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Fix multiple formatting problems in HTML docs The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 22:25:37 +08:00
<?xml version="1.0" encoding="UTF-8"?>
docs: switch to using HTML5 doctype declaration The HTML5 doctype is simply <!DOCTYPE html> no DTD is present because HTML5 is no longer defined as an extension of SGML. XSL has no way to natively output a doctype without a public or system identifier, so we have to use an <xsl:text> hack instead. See also https://dev.w3.org/html5/html-author/#doctype-declaration Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-27 01:01:25 +08:00
<!DOCTYPE html>
Fix multiple formatting problems in HTML docs The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 22:25:37 +08:00
<html xmlns="http://www.w3.org/1999/xhtml">
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<body>
<h1>Network Filters</h1>
<ul id="toc">
</ul>
<p>
This page provides an introduction to libvirt's network filters,
their goals, concepts and XML format.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h2><a id="goals">Goals and background</a></h2>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
The goal of the network filtering XML is to enable administrators
of a virtualized system to configure and enforce network traffic
filtering rules on virtual
machines and manage the parameters of network traffic that
virtual machines
are allowed to send or receive.
The network traffic filtering rules are
applied on the host when a virtual machine is started. Since the
filtering rules
cannot be circumvented from within
the virtual machine, it makes them mandatory from the point of
view of a virtual machine user.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
The network filter subsystem allows each virtual machine's network
traffic filtering rules to be configured individually on a per
interface basis. The rules are
applied on the host when the virtual machine is started and can be modified
while the virtual machine is running. The latter can be achieved by
modifying the XML description of a network filter.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Multiple virtual machines can make use of the same generic network filter.
When such a filter is modified, the network traffic filtering rules
of all running virtual machines that reference this filter are updated.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Network filtering support is available <span class="since">since 0.8.1
doc: fix writing of QEMU QEMU should be written all upper or all lower case.
2017-03-08 01:09:58 +08:00
(QEMU, KVM)</span>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h2><a id="nwfconcepts">Concepts</a></h2>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
The network traffic filtering subsystem enables configuration
of network traffic filtering rules on individual network
interfaces that are configured for certain types of
network configurations. Supported network types are
</p>
<ul>
<li><code>network</code></li>
<li><code>ethernet</code> -- must be used in bridging mode</li>
<li><code>bridge</code></li>
</ul>
<p>
The interface XML is used to reference a top-level filter. In the
following example, the interface description references
the filter <code>clean-traffic</code>.
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
...
&lt;devices&gt;
&lt;interface type='bridge'&gt;
&lt;mac address='00:16:3e:5d:c7:9e'/&gt;
&lt;filterref filter='clean-traffic'/&gt;
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Network filters are written in XML and may either contain references
to other filters, contain rules for traffic filtering, or
hold a combination of both. The above referenced filter
<code>clean-traffic </code> is a filter that only contains references to
other filters and no actual filtering rules. Since references to
other filters can be used, a <i>tree</i> of filters can be built.
The <code>clean-traffic</code> filter can be viewed using the
command <code>virsh nwfilter-dumpxml clean-traffic</code>.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
As previously mentioned, a single network filter can be referenced
by multiple virtual machines. Since interfaces will typically
have individual parameters associated with their respective traffic
filtering rules, the rules described in a filter XML can
be parameterized with variables. In this case, the variable name
is used in the filter XML and the name and value are provided at the
place where the filter is referenced. In the
following example, the interface description has been extended with
the parameter <code>IP</code> and a dotted IP address as value.
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
...
&lt;devices&gt;
&lt;interface type='bridge'&gt;
&lt;mac address='00:16:3e:5d:c7:9e'/&gt;
&lt;filterref filter='clean-traffic'&gt;
&lt;parameter name='IP' value='10.0.0.1'/&gt;
&lt;/filterref&gt;
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
In this particular example, the <code>clean-traffic</code> network
traffic filter will be instantiated with the IP address parameter
10.0.0.1 and enforce that the traffic from this interface will
always be using 10.0.0.1 as the source IP address, which is
one of the purposes of this particular filter.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfconceptschains">Filtering chains</a></h3>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
Filtering rules are organized in filter chains. These chains can be
thought of as having a tree structure with packet
Fix multiple formatting problems in HTML docs The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 22:25:37 +08:00
filtering rules as entries in individual chains (branches). <br/>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
Packets start their filter evaluation in the <code>root</code> chain
and can then continue their evaluation in other chains, return from
those chains back into the <code>root</code> chain or be
dropped or accepted by a filtering rule in one of the traversed chains.
<br/>
Libvirt's network filtering system automatically creates individual
<code>root</code> chains for every virtual machine's network interface
on which the user chooses to activate traffic filtering.
The user may write filtering rules that are either directly instantiated
in the <code>root</code> chain or may create protocol-specific
filtering chains for efficient evaluation of protocol-specific rules.
The following chains exist:
</p>
<ul>
<li>root</li>
<li>mac <span class="since">(since 0.9.8)</span></li>
<li>stp (spanning tree protocol)
<span class="since">(since 0.9.8)</span></li>
<li>vlan (802.1Q) <span class="since">(since 0.9.8)</span></li>
<li>arp, rarp</li>
<li>ipv4</li>
<li>ipv6</li>
</ul>
<p>
<span class="since">Since 0.9.8</span> multiple chains evaluating the
<code>mac</code>, <code>stp</code>, <code>vlan</code>,
<code>arp</code>, <code>rarp</code>, <code>ipv4</code>, or
<code>ipv6</code> protocol can be created using
the protocol name only as a prefix in the chain's name. This for
examples allows chains with names <code>arp-xyz</code> or
<code>arp-test</code> to be specified and have ARP protocol packets
evaluated in those chains.
<br/><br/>
The following filter shows an example of filtering ARP traffic
in the <code>arp</code> chain.
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
<pre>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
&lt;filter name='no-arp-spoofing' chain='arp' priority='-500'&gt;
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
&lt;uuid&gt;f88f1932-debf-4aa1-9fbe-f10d3aa4bc95&lt;/uuid&gt;
&lt;rule action='drop' direction='out' priority='300'&gt;
&lt;mac match='no' srcmacaddr='$MAC'/&gt;
&lt;/rule&gt;
&lt;rule action='drop' direction='out' priority='350'&gt;
&lt;arp match='no' arpsrcmacaddr='$MAC'/&gt;
&lt;/rule&gt;
&lt;rule action='drop' direction='out' priority='400'&gt;
&lt;arp match='no' arpsrcipaddr='$IP'/&gt;
&lt;/rule&gt;
&lt;rule action='drop' direction='in' priority='450'&gt;
&lt;arp opcode='Reply'/&gt;
&lt;arp match='no' arpdstmacaddr='$MAC'/&gt;
&lt;/rule&gt;
&lt;rule action='drop' direction='in' priority='500'&gt;
&lt;arp match='no' arpdstipaddr='$IP'/&gt;
&lt;/rule&gt;
&lt;rule action='accept' direction='inout' priority='600'&gt;
&lt;arp opcode='Request'/&gt;
&lt;/rule&gt;
&lt;rule action='accept' direction='inout' priority='650'&gt;
&lt;arp opcode='Reply'/&gt;
&lt;/rule&gt;
&lt;rule action='drop' direction='inout' priority='1000'/&gt;
&lt;/filter&gt;
</pre>
<p>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
The consequence of putting ARP-specific rules in the <code>arp</code>
chain, rather than for example in the <code>root</code> chain, is that
packets for any other protocol than ARP do not need to be evaluated by
ARP protocol-specific rules. This improves the efficiency
of the traffic filtering. However, one must then pay attention to only
put filtering rules for the given protocol into the chain since
any other rules will not be evaluated, i.e., an IPv4 rule will not
be evaluated in the ARP chain since no IPv4 protocol packets will
traverse the ARP chain.
<br/><br/>
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfconceptschainpriorities">Filtering chain priorities</a></h3>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<p>
All chains are connected to the <code>root</code> chain. The order in
which those chains are accessed is influenced by the priority of the
chain. The following table shows the chains that can be assigned a
priority and their default priorities.
</p>
<table class="top_table">
<tr>
<th> Chain (prefix) </th>
<th> Default priority </th>
</tr>
<tr>
<td>stp</td><td>-810</td>
</tr>
<tr>
<td>mac</td><td>-800</td>
</tr>
<tr>
<td>vlan</td><td>-750</td>
</tr>
<tr>
<td>ipv4</td><td>-700</td>
</tr>
<tr>
<td>ipv6</td><td>-600</td>
</tr>
<tr>
<td>arp</td><td>-500</td>
</tr>
<tr>
<td>rarp</td><td>-400</td>
</tr>
</table>
<p>
A chain with a lower priority value is accessed before one with a
higher value.
Fix multiple formatting problems in HTML docs The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 22:25:37 +08:00
<br/>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<span class="since">Since 0.9.8</span> the above listed chains
can be assigned custom priorities by writing a value in the
range [-1000, 1000] into the priority (XML) attribute in the filter
node. The above example filter shows the default priority of -500
for <code>arp</code> chains.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfconceptsvars">Usage of variables in filters</a></h3>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<p>
Two variables names have so far been reserved for usage by the
network traffic filtering subsystem: <code>MAC</code> and
<code>IP</code>.
<br/><br/>
<code>MAC</code> is the MAC address of the
network interface. A filtering rule that references this variable
will automatically be instantiated with the MAC address of the
interface. This works without the user having to explicitly provide
the MAC parameter. Even though it is possible to specify the MAC
parameter similar to the IP parameter above, it is discouraged
since libvirt knows what MAC address an interface will be using.
<br/><br/>
The parameter <code>IP</code> represents the IP address
that the operating system inside the virtual machine is expected
to use on the given interface. The <code>IP</code> parameter
is special in so far as the libvirt daemon will try to determine
the IP address (and thus the IP parameter's value) that is being
used on an interface if the parameter
is not explicitly provided but referenced.
For current limitations on IP address detection, consult the
<a href="#nwflimits">section on limitations</a> on how to use this
feature and what to expect when using it.
<br/><br/>
The above-shown network filer <code>no-arp-spoofing</code>
is an example of
a network filter XML referencing the <code>MAC</code> and
<code>IP</code> variables.
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note that referenced variables are always prefixed with the
$ (dollar) sign. The format of the value of a variable
must be of the type expected by the filter attribute in the
XML. In the above example, the <code>IP</code> parameter
must hold a dotted IP address in decimal numbers format.
Failure to provide the correct
value type will result in the filter not being instantiatable
and will prevent a virtual machine from starting or the
interface from attaching when hotplugging is used. The types
that are expected for each XML attribute are shown
below.
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<br/><br/>
<span class="since">Since 0.9.8</span> variables can contain lists of
elements, e.g., the variable <code>IP</code> can contain multiple IP
addresses that are valid on a particular interface. The notation for
providing multiple elements for the IP variable is:
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
...
&lt;devices&gt;
&lt;interface type='bridge'&gt;
&lt;mac address='00:16:3e:5d:c7:9e'/&gt;
&lt;filterref filter='clean-traffic'&gt;
&lt;parameter name='IP' value='10.0.0.1'/&gt;
&lt;parameter name='IP' value='10.0.0.2'/&gt;
&lt;parameter name='IP' value='10.0.0.3'/&gt;
&lt;/filterref&gt;
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<p>
This then allows filters to enable multiple IP addresses
per interface. Therefore, with the list
of IP address shown above, the following rule will create 3
individual filtering rules, one for each IP address.
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
...
&lt;rule action='accept' direction='in' priority='500'&gt;
&lt;tcp srpipaddr='$IP'/&gt;
&lt;/rule&gt;
...
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
</pre>
Add documentation new ways to access members of variables This patch adds documentation about the new 'ways' that users can access the contents of variables in filters: - access via index: $TEST[2] - access via iterators $TEST[@1]
2012-01-11 19:42:37 +08:00
<p>
<span class="since">Since 0.9.10</span> it is possible to access
individual elements of a variable holding a list of elements.
A filtering rule like the following accesses the 2nd element
of the variable DSTPORTS.
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
...
&lt;rule action='accept' direction='in' priority='500'&gt;
&lt;udp dstportstart='$DSTPORTS[1]'/&gt;
&lt;/rule&gt;
...
Add documentation new ways to access members of variables This patch adds documentation about the new 'ways' that users can access the contents of variables in filters: - access via index: $TEST[2] - access via iterators $TEST[@1]
2012-01-11 19:42:37 +08:00
</pre>
<p>
<span class="since">Since 0.9.10</span> it is possible to create
filtering rules that instantiate all combinations of rules from
different lists using the notation of
<code>$VARIABLE[@&lt;iterator ID&gt;]</code>.
The following rule allows a virtual machine to
receive traffic on a set of ports, which are specified in DSTPORTS,
from the set of source IP address specified in SRCIPADDRESSES.
The rule generates all combinations of elements of the variable
DSTPORT with those of SRCIPADDRESSES by using two independent
iterators to access their elements.
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
...
&lt;rule action='accept' direction='in' priority='500'&gt;
&lt;ip srcipaddr='$SRCIPADDRESSES[@1]' dstportstart='$DSTPORTS[@2]'/&gt;
&lt;/rule&gt;
...
Add documentation new ways to access members of variables This patch adds documentation about the new 'ways' that users can access the contents of variables in filters: - access via index: $TEST[2] - access via iterators $TEST[@1]
2012-01-11 19:42:37 +08:00
</pre>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Add documentation new ways to access members of variables This patch adds documentation about the new 'ways' that users can access the contents of variables in filters: - access via index: $TEST[2] - access via iterators $TEST[@1]
2012-01-11 19:42:37 +08:00
<p>
In an example we assign concrete values to SRCIPADDRESSES and DSTPORTS
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
SRCIPADDRESSES = [ 10.0.0.1, 11.1.2.3 ]
DSTPORTS = [ 80, 8080 ]
Add documentation new ways to access members of variables This patch adds documentation about the new 'ways' that users can access the contents of variables in filters: - access via index: $TEST[2] - access via iterators $TEST[@1]
2012-01-11 19:42:37 +08:00
</pre>
<p>
Accessing the variables using $SRCIPADDRESSES[@1] and $DSTPORTS[@2] would
then result in all combinations of addresses and ports being created:
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
10.0.0.1, 80
10.0.0.1, 8080
11.1.2.3, 80
11.1.2.3, 8080
Add documentation new ways to access members of variables This patch adds documentation about the new 'ways' that users can access the contents of variables in filters: - access via index: $TEST[2] - access via iterators $TEST[@1]
2012-01-11 19:42:37 +08:00
</pre>
<p>
Accessing the same variables using a single iterator, for example by using
the notation $SRCIPADDRESSES[@1] and $DSTPORTS[@1], would result in
parallel access to both lists and result in the following combinations:
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
10.0.0.1, 80
11.1.2.3, 8080
Add documentation new ways to access members of variables This patch adds documentation about the new 'ways' that users can access the contents of variables in filters: - access via index: $TEST[2] - access via iterators $TEST[@1]
2012-01-11 19:42:37 +08:00
</pre>
<p>
Further, the notation of $VARIABLE is short-hand for $VARIABLE[@0]. The
former notation always assumes the iterator with Id '0'.
Fix multiple formatting problems in HTML docs The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 22:25:37 +08:00
</p>
nwfilter: add DHCP snooping This patch adds DHCP snooping support to libvirt. The learning method for IP addresses is specified by setting the "CTRL_IP_LEARNING" variable to one of "any" [default] (existing IP learning code), "none" (static only addresses) or "dhcp" (DHCP snooping). Active leases are saved in a lease file and reloaded on restart or HUP. The following interface XML activates and uses the DHCP snooping: <interface type='bridge'> <source bridge='virbr0'/> <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref> </interface> All filters containing the variable 'IP' are automatically adjusted when the VM receives an IP address via DHCP. However, multiple IP addresses per interface are silently ignored in this patch, thus only supporting one IP address per interface. Multiple IP address support is added in a later patch in this series. Signed-off-by: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2012-06-02 07:32:06 +08:00
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfelemsRulesAdvIPAddrDetection">Automatic IP address detection</a></h3>
nwfilter: add DHCP snooping This patch adds DHCP snooping support to libvirt. The learning method for IP addresses is specified by setting the "CTRL_IP_LEARNING" variable to one of "any" [default] (existing IP learning code), "none" (static only addresses) or "dhcp" (DHCP snooping). Active leases are saved in a lease file and reloaded on restart or HUP. The following interface XML activates and uses the DHCP snooping: <interface type='bridge'> <source bridge='virbr0'/> <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref> </interface> All filters containing the variable 'IP' are automatically adjusted when the VM receives an IP address via DHCP. However, multiple IP addresses per interface are silently ignored in this patch, thus only supporting one IP address per interface. Multiple IP address support is added in a later patch in this series. Signed-off-by: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2012-06-02 07:32:06 +08:00
<p>
The detection of IP addresses used on a virtual machine's interface
is automatically activated if the variable <code>IP</code> is referenced
but no value has been assigned to it.
<span class="since">Since 0.9.13</span>
the variable <code>CTRL_IP_LEARNING</code> can be used to specify
the IP address learning method to use. Valid values are <code>any</code>,
<code>dhcp</code>, or <code>none</code>.
<br/><br/>
The value <code>any</code> means that libvirt may use any packet to
determine the address in use by a virtual machine, which is the default
behavior if the variable <code>CTRL_IP_LEARNING</code> is not set. This method
will only detect a single IP address on an interface.
Once a VM's IP address has been detected, its IP network traffic
will be locked to that address, if for example IP address spoofing
is prevented by one of its filters. In that case the user of the VM
will not be able to change the IP address on the interface inside
the VM, which would be considered IP address spoofing.
When a VM is migrated to another host or resumed after a suspend operation,
the first packet sent by the VM will again determine the IP address it can
use on a particular interface.
Fix multiple formatting problems in HTML docs The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 22:25:37 +08:00
<br/>
nwfilter: add DHCP snooping This patch adds DHCP snooping support to libvirt. The learning method for IP addresses is specified by setting the "CTRL_IP_LEARNING" variable to one of "any" [default] (existing IP learning code), "none" (static only addresses) or "dhcp" (DHCP snooping). Active leases are saved in a lease file and reloaded on restart or HUP. The following interface XML activates and uses the DHCP snooping: <interface type='bridge'> <source bridge='virbr0'/> <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref> </interface> All filters containing the variable 'IP' are automatically adjusted when the VM receives an IP address via DHCP. However, multiple IP addresses per interface are silently ignored in this patch, thus only supporting one IP address per interface. Multiple IP address support is added in a later patch in this series. Signed-off-by: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2012-06-02 07:32:06 +08:00
A value of <code>dhcp</code> specifies that libvirt should only honor DHCP
server-assigned addresses with valid leases. This method supports the detection
and usage of multiple IP address per interface.
When a VM is resumed after a suspend operation, still valid IP address leases
are applied to its filters. Otherwise the VM is expected to again use DHCP to obtain new
IP addresses. The migration of a VM to another physical host requires that
the VM again runs the DHCP protocol.
<br/><br/>
Use of <code>CTRL_IP_LEARNING=dhcp</code> (DHCP snooping) provides additional
anti-spoofing security, especially when combined with a filter allowing
only trusted DHCP servers to assign addresses. To enable this, set the
variable <code>DHCPSERVER</code> to the IP address of a valid DHCP server
and provide filters that use this variable to filter incoming DHCP responses.
<br/><br/>
When DHCP snooping is enabled and the DHCP lease expires,
the VM will no longer be able to use the IP address until it acquires a
new, valid lease from a DHCP server. If the VM is migrated, it must get
a new valid DHCP lease to use an IP address (e.g., by
bringing the VM interface down and up again).
<br/><br/>
Note that automatic DHCP detection listens to the DHCP traffic
the VM exchanges with the DHCP server of the infrastructure. To avoid
denial-of-service attacks on libvirt, the evaluation of those packets
is rate-limited, meaning that a VM sending an excessive number of DHCP
packets per second on an interface will not have all of those packets
evaluated and thus filters may not get adapted. Normal DHCP client
behavior is assumed to send a low number of DHCP packets per second.
Further, it is important to setup appropriate filters on all VMs in
the infrastructure to avoid them being able to send DHCP
packets. Therefore VMs must either be prevented from sending UDP and TCP
traffic from port 67 to port 68 or the <code>DHCPSERVER</code>
variable should be used on all VMs to restrict DHCP server messages to
only be allowed to originate from trusted DHCP servers. At the same
time anti-spoofing prevention must be enabled on all VMs in the subnet.
<br/><br/>
If <code>CTRL_IP_LEARNING</code> is set to <code>none</code>, libvirt does not do
IP address learning and referencing <code>IP</code> without assigning it an
explicit value is an error.
<br/><br/>
The following XML provides an example for the activation of IP address learning
using the DHCP snooping method:
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
&lt;interface type='bridge'&gt;
&lt;source bridge='virbr0'/&gt;
&lt;filterref filter='clean-traffic'&gt;
&lt;parameter name='CTRL_IP_LEARNING' value='dhcp'/&gt;
&lt;/filterref&gt;
&lt;/interface&gt;
nwfilter: add DHCP snooping This patch adds DHCP snooping support to libvirt. The learning method for IP addresses is specified by setting the "CTRL_IP_LEARNING" variable to one of "any" [default] (existing IP learning code), "none" (static only addresses) or "dhcp" (DHCP snooping). Active leases are saved in a lease file and reloaded on restart or HUP. The following interface XML activates and uses the DHCP snooping: <interface type='bridge'> <source bridge='virbr0'/> <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref> </interface> All filters containing the variable 'IP' are automatically adjusted when the VM receives an IP address via DHCP. However, multiple IP addresses per interface are silently ignored in this patch, thus only supporting one IP address per interface. Multiple IP address support is added in a later patch in this series. Signed-off-by: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2012-06-02 07:32:06 +08:00
</pre>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfelemsReservedVars">Reserved Variables</a></h3>
nwfilter: add DHCP snooping This patch adds DHCP snooping support to libvirt. The learning method for IP addresses is specified by setting the "CTRL_IP_LEARNING" variable to one of "any" [default] (existing IP learning code), "none" (static only addresses) or "dhcp" (DHCP snooping). Active leases are saved in a lease file and reloaded on restart or HUP. The following interface XML activates and uses the DHCP snooping: <interface type='bridge'> <source bridge='virbr0'/> <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref> </interface> All filters containing the variable 'IP' are automatically adjusted when the VM receives an IP address via DHCP. However, multiple IP addresses per interface are silently ignored in this patch, thus only supporting one IP address per interface. Multiple IP address support is added in a later patch in this series. Signed-off-by: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2012-06-02 07:32:06 +08:00
<p>
The following table lists reserved variables in use by libvirt.
</p>
<table class="top_table">
<tr>
<th> Variable Name </th>
<th> Semantics </th>
</tr>
<tr>
<td> MAC </td>
<td> The MAC address of the interface </td>
</tr>
<tr>
<td> IP </td>
<td> The list of IP addresses in use by an interface </td>
</tr>
<tr>
<td> IPV6 </td>
<td> Not currently implemented:
the list of IPV6 addresses in use by an interface </td>
</tr>
<tr>
<td> DHCPSERVER </td>
<td> The list of IP addresses of trusted DHCP servers</td>
</tr>
<tr>
<td> DHCPSERVERV6 </td>
<td> Not currently implemented:
The list of IPv6 addresses of trusted DHCP servers</td>
</tr>
<tr>
<td> CTRL_IP_LEARNING </td>
<td> The choice of the IP address detection mode </td>
</tr>
</table>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h2><a id="nwfelems">Element and attribute overview</a></h2>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
The root element required for all network filters is
named <code>filter</code> with two possible attributes. The
<code>name</code> attribute provides a unique name of the
given filter. The <code>chain</code> attribute is optional but
allows certain filters to be better organized for more efficient
processing by the firewall subsystem of the underlying host.
Currently the system only supports the chains <code>root,
ipv4, ipv6, arp and rarp</code>.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfelemsRefs">References to other filters</a></h3>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Any filter may hold references to other filters. Individual
filters may be referenced multiple times in a filter tree but
references between filters must not introduce loops (directed
acyclic graph).
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
The following shows the XML of the <code>clean-traffic</code>
network filter referencing several other filters.
</p>
<pre>
&lt;filter name='clean-traffic'&gt;
&lt;uuid&gt;6ef53069-ba34-94a0-d33d-17751b9b8cb1&lt;/uuid&gt;
&lt;filterref filter='no-mac-spoofing'/&gt;
&lt;filterref filter='no-ip-spoofing'/&gt;
&lt;filterref filter='allow-incoming-ipv4'/&gt;
&lt;filterref filter='no-arp-spoofing'/&gt;
&lt;filterref filter='no-other-l2-traffic'/&gt;
&lt;filterref filter='qemu-announce-self'/&gt;
&lt;/filter&gt;
</pre>
<p>
To reference another filter, the XML node <code>filterref</code>
needs to be provided inside a <code>filter</code> node. This
node must have the attribute <code>filter</code> whose value contains
the name of the filter to be referenced.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
New network filters can be defined at any time and
may contain references to network filters that are
not known to libvirt, yet. However, once a virtual machine
is started or a network interface
referencing a filter is to be hotplugged, all network filters
in the filter tree must be available. Otherwise the virtual
machine will not start or the network interface cannot be
attached.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfelemsRules">Filter rules</a></h3>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
The following XML shows a simple example of a network
traffic filter implementing a rule to drop traffic if
the IP address (provided through the value of the
variable IP) in an outgoing IP packet is not the expected
one, thus preventing IP address spoofing by the VM.
</p>
<pre>
&lt;filter name='no-ip-spoofing' chain='ipv4'&gt;
&lt;uuid&gt;fce8ae33-e69e-83bf-262e-30786c1f8072&lt;/uuid&gt;
&lt;rule action='drop' direction='out' priority='500'&gt;
&lt;ip match='no' srcipaddr='$IP'/&gt;
&lt;/rule&gt;
&lt;/filter&gt;
</pre>
<p>
A traffic filtering rule starts with the <code>rule</code>
node. This node may contain up to three attributes
</p>
<ul>
<li>
support continue/return targets in nwfilter This patch adds support for "continue" and "return" actions in filter rules. Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
2011-10-19 03:55:25 +08:00
action -- mandatory; must either be <code>drop</code>
(matching the rule silently discards the packet with no
further analysis),
<code>reject</code> (matching the rule generates an ICMP
reject message with no further analysis) <span class="since">(since
0.9.0)</span>, <code>accept</code> (matching the rule accepts
the packet with no further analysis), <code>return</code>
(matching the rule passes this filter, but returns control to
the calling filter for further
analysis) <span class="since">(since 0.9.7)</span>,
Fix multiple formatting problems in HTML docs The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 22:25:37 +08:00
or <code>continue</code> (matching the rule goes on to the next
support continue/return targets in nwfilter This patch adds support for "continue" and "return" actions in filter rules. Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
2011-10-19 03:55:25 +08:00
rule for further analysis) <span class="since">(since
0.9.7)</span>.
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</li>
<li>
direction -- mandatory; must either be <code>in</code>, <code>out</code> or
<code>inout</code> if the rule is for incoming,
outgoing or incoming-and-outgoing traffic
</li>
<li>
priority -- optional; the priority of the rule controls the order in
which the rule will be instantiated relative to other rules.
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
Rules with lower value will be instantiated before rules with higher
values.
Valid values are in the range of 0 to 1000.
<span class="since">Since 0.9.8</span> this has been extended to cover
the range of -1000 to 1000. If this attribute is not
provided, priority 500 will automatically be assigned.
Fix multiple formatting problems in HTML docs The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 22:25:37 +08:00
<br/>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
Note that filtering rules in the <code>root</code> chain are sorted
with filters connected to the <code>root</code> chain following
their priorities. This allows to interleave filtering rules with
access to filter chains.
(See also section on
<a href="#nwfconceptschainpriorities">
filtering chain priorities
</a>.)
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</li>
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
<li>
statematch -- optional; possible values are '0' or 'false' to
turn the underlying connection state matching off; default is 'true'
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
Also read the section on <a href="#nwfelemsRulesAdv">advanced configuration</a>
topics.
</li>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</ul>
<p>
The above example indicates that the traffic of type <code>ip</code>
Fix some typos in messages, docs and comments.
2012-08-23 02:29:18 +08:00
will be associated with the chain 'ipv4' and the rule will have
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
priority 500. If for example another filter is referenced whose
traffic of type <code>ip</code> is also associated with the chain
'ipv4' then that filter's rules will be ordered relative to the priority
500 of the shown rule.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
A rule may contain a single rule for filtering of traffic. The
above example shows that traffic of type <code>ip</code> is to be
filtered.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h4><a id="nwfelemsRulesProto">Supported protocols</a></h4>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
The following sections enumerate the list of protocols that
are supported by the network filtering subsystem. The
type of traffic a rule is supposed to filter on is provided
in the <code>rule</code> node as a nested node. Depending
on the traffic type a rule is filtering, the attributes are
different. The above example showed the single
attribute <code>srcipaddr</code> that is valid inside the
<code>ip</code> traffic filtering node. The following sections
show what attributes are valid and what type of data they are
expecting. The following datatypes are available:
</p>
<ul>
<li>UINT8 : 8 bit integer; range 0-255</li>
<li>UINT16: 16 bit integer; range 0-65535</li>
Fix some typos in messages, docs and comments.
2012-08-23 02:29:18 +08:00
<li>MAC_ADDR: MAC address in dotted decimal format, i.e., 00:11:22:33:44:55</li>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<li>MAC_MASK: MAC address mask in MAC address format, i.e., FF:FF:FF:FC:00:00</li>
<li>IP_ADDR: IP address in dotted decimal format, i.e., 10.1.2.3</li>
<li>IP_MASK: IP address mask in either dotted decimal format (255.255.248.0) or CIDR mask (0-32)</li>
<li>IPV6_ADDR: IPv6 address in numbers format, i.e., FFFF::1</li>
<li>IPV6_MASK: IPv6 mask in numbers format (FFFF:FFFF:FC00::) or CIDR mask (0-128)</li>
<li>STRING: A string</li>
nwfilter: enable filtering of gratuitous ARP packets This patch enables filtering of gratuitous ARP packets using the following XML: <rule action='accept' direction='in' priority='425'> <arp gratuitous='true'/> </rule>
2011-05-24 07:41:18 +08:00
<li>BOOLEAN: 'true', 'yes', '1' or 'false', 'no', '0'</li>
nwfilter: Add support for ipset This patch adds support for the recent ipset iptables extension to libvirt's nwfilter subsystem. Ipset allows to maintain 'sets' of IP addresses, ports and other packet parameters and allows for faster lookup (in the order of O(1) vs. O(n)) and rule evaluation to achieve higher throughput than what can be achieved with individual iptables rules. On the command line iptables supports ipset using iptables ... -m set --match-set <ipset name> <flags> -j ... where 'ipset name' is the name of a previously created ipset and flags is a comma-separated list of up to 6 flags. Flags use 'src' and 'dst' for selecting IP addresses, ports etc. from the source or destination part of a packet. So a concrete example may look like this: iptables -A INPUT -m set --match-set test src,src -j ACCEPT Since ipset management is quite complex, the idea was to leave ipset management outside of libvirt but still allow users to reference an ipset. The user would have to make sure the ipset is available once the VM is started so that the iptables rule(s) referencing the ipset can be created. Using XML to describe an ipset in an nwfilter rule would then look as follows: <rule action='accept' direction='in'> <all ipset='test' ipsetflags='src,src'/> </rule> The two parameters on the command line are also the two distinct XML attributes 'ipset' and 'ipsetflags'. FYI: Here is the man page for ipset: https://ipset.netfilter.org/ipset.man.html Regards, Stefan
2012-05-21 18:26:34 +08:00
<li>IPSETFLAGS: The source and destination flags of the ipset described
by up to 6 'src' or 'dst' elements selecting features from either
the source or destination part of the packet header; example:
src,src,dst. The number of 'selectors' to provide here depends
on the type of ipset that is referenced.</li>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</ul>
<p>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Every attribute except for those of type IP_MASK or IPV6_MASK can
be negated using the <code>match</code>
attribute with value <code>no</code>. Multiple negated attributes
may be grouped together. The following
XML fragment shows such an example using abstract attributes.
</p>
<pre>
[...]
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
&lt;rule action='drop' direction='in'&gt;
&lt;protocol match='no' attribute1='value1' attribute2='value2'/&gt;
&lt;protocol attribute3='value3'/&gt;
&lt;/rule&gt;
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
[...]
</pre>
<p>
Rules perform a logical AND evaluation on all values of the given
protocol attributes. Thus, if a single attribute's value does not match
the one given in the rule, the whole rule will be skipped during
evaluation. Therefore, in the above example incoming traffic
will only be dropped if
the protocol property attribute1 does not match value1 AND
the protocol property attribute2 does not match value2 AND
the protocol property attribute3 matches value3.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoMAC">MAC (Ethernet)</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>mac</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: Rules of this type should go into the <code>root</code> chain.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of sender</td>
</tr>
<tr>
<td>dstmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of destination</td>
</tr>
<tr>
<td>dstmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of destination</td>
</tr>
<tr>
<td>protocolid</td>
<td>UINT16 (0x600-0xffff), STRING</td>
<td>Layer 3 protocol ID</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
Valid Strings for <code>protocolid</code> are: arp, rarp, ipv4, ipv6
</p>
build: fix HTML errors in nwfilter docs A build on Ubuntu reported: || Generating formatnwfilter.html.tmp /dados/develop/libvirt/docs/formatnwfilter.html.in|390| HTML parser error : Unexpected end tag : p || </p> || ^ /dados/develop/libvirt/docs/formatnwfilter.html.in|705| HTML parser error : Unexpected end tag : code || <td>End of range of valid source ports</code></td> || ^ /dados/develop/libvirt/docs/formatnwfilter.html.in|710| HTML parser error : Unexpected end tag : code || <td>Start of range of valid destination ports</code></td> || ^ * docs/formatnwfilter.html.in: Fix invalid HTML constructs. Reported by Eduardo Otubo.
2010-05-26 07:20:51 +08:00
<pre>
[...]
&lt;mac match='no' srcmacaddr='$MAC'/&gt;
[...]
</pre>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoVLAN">VLAN (802.1Q)</a>
Add documentation for VLAN filtering support Add documentation for the VLAN filtering support. Describe the XML attributes that are supported. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2011-11-19 20:26:56 +08:00
<span class="since">(Since 0.9.8)</span>
</h5>
<p>
Protocol ID: <code>vlan</code>
<br/>
Note: Rules of this type should go either into the <code>root</code> or
<code>vlan</code> chain.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of sender</td>
</tr>
<tr>
<td>dstmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of destination</td>
</tr>
<tr>
<td>dstmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of destination</td>
</tr>
<tr>
Fix vlanid attribute name in nwfilter docs 'vlanid' is the attribute name in our XML, 'vlan-id' is the ebtables attribute: [root@localhost ~]# virsh nwfilter-dumpxml myself <filter name='myself' chain='root'> <uuid>7192ef51-cd50-4f14-ad7b-fa5c69ea19e3</uuid> <rule action='accept' direction='in' priority='500'> <vlan dstmacaddr='00:11:22:33:44:55' vlanid='44'/> </rule> </filter> [root@localhost ~]# ebtables -t nat -L Bridge table: nat ... -p 802_1Q -d 0:11:22:33:44:55 --vlan-id 44 -j ACCEPT https://bugzilla.redhat.com/show_bug.cgi?id=1126721 Signed-off-by: Ján Tomko <jtomko@redhat.com>
2014-08-05 13:25:16 +08:00
<td>vlanid</td>
Add documentation for VLAN filtering support Add documentation for the VLAN filtering support. Describe the XML attributes that are supported. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2011-11-19 20:26:56 +08:00
<td>UINT16 (0x0-0xfff, 0 - 4095)</td>
<td>VLAN ID</td>
</tr>
<tr>
<td>encap-protocol</td>
<td>UINT16 (0x03c-0xfff), String</td>
<td>Encapsulated layer 3 protocol ID</td>
</tr>
<tr>
<td>comment </td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
</table>
<p>
Valid Strings for <code>encap-protocol</code> are: arp, ipv4, ipv6
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoSTP">STP (Spanning Tree Protocol)</a>
Add documentation for STP filtering support Add documentation for the STP filtering support. Describe the XML attributes that are supported. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2011-11-23 04:12:03 +08:00
<span class="since">(Since 0.9.8)</span>
</h5>
<p>
Protocol ID: <code>stp</code>
<br/>
Note: Rules of this type should go either into the <code>root</code> or
<code>stp</code> chain.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of sender</td>
</tr>
<tr>
<td>type</td>
<td>UINT8</td>
Fix some typos in messages, docs and comments.
2012-08-23 02:29:18 +08:00
<td>Bridge Protocol Data Unit (BPDU) type</td>
Add documentation for STP filtering support Add documentation for the STP filtering support. Describe the XML attributes that are supported. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2011-11-23 04:12:03 +08:00
</tr>
<tr>
<td>flags</td>
<td>UINT8</td>
<td>BPDU flag</td>
</tr>
<tr>
<td>root-priority</td>
<td>UINT16</td>
<td>Root priority (range start)</td>
</tr>
<tr>
<td>root-priority-hi</td>
<td>UINT16</td>
<td>Root priority range end</td>
</tr>
<tr>
<td>root-address</td>
<td>MAC_ADDRESS</td>
<td>Root MAC address</td>
</tr>
<tr>
<td>root-address-mask</td>
<td>MAC_MASK</td>
<td>Root MAC address mask</td>
</tr>
<tr>
<td>root-cost</td>
<td>UINT32</td>
<td>Root path cost (range start)</td>
</tr>
<tr>
<td>root-cost-hi</td>
<td>UINT32</td>
<td>Root path cost range end</td>
</tr>
<tr>
<td>sender-priority</td>
<td>UINT16</td>
<td>Sender priority (range start)</td>
</tr>
<tr>
<td>sender-priority-hi</td>
<td>UINT16</td>
<td>Sender priority range end</td>
</tr>
<tr>
<td>sender-address</td>
<td>MAC_ADDRESS</td>
<td>BPDU sender MAC address</td>
</tr>
<tr>
<td>sender-address-mask</td>
<td>MAC_MASK</td>
<td>BPDU sender MAC address mask</td>
</tr>
<tr>
<td>port</td>
<td>UINT16</td>
<td>Port identifier (range start)</td>
</tr>
<tr>
<td>port_hi</td>
<td>UINT16</td>
<td>Port identifier range end</td>
</tr>
<tr>
<td>msg-age</td>
<td>UINT16</td>
<td>Message age timer (range start)</td>
</tr>
<tr>
<td>msg-age-hi</td>
<td>UINT16</td>
<td>Message age timer range end</td>
</tr>
<tr>
<td>max-age</td>
<td>UINT16</td>
<td>Maximum age timer (range start)</td>
</tr>
<tr>
<td>max-age-hi</td>
<td>UINT16</td>
<td>Maximum age timer range end</td>
</tr>
<tr>
<td>hello-time</td>
<td>UINT16</td>
<td>Hello time timer (range start)</td>
</tr>
<tr>
<td>hello-time-hi</td>
<td>UINT16</td>
<td>Hello time timer range end</td>
</tr>
<tr>
<td>forward-delay</td>
<td>UINT16</td>
<td>Forward delay (range start)</td>
</tr>
<tr>
<td>forward-delay-hi</td>
<td>UINT16</td>
<td>Forward delay range end</td>
</tr>
<tr>
<td>comment</td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
</table>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoARP">ARP/RARP</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>arp</code> or <code>rarp</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: Rules of this type should either go into the
<code>root</code> or <code>arp/rarp</code> chain.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of sender</td>
</tr>
<tr>
<td>dstmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of destination</td>
</tr>
<tr>
<td>dstmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of destination</td>
</tr>
<tr>
<td>hwtype</td>
<td>UINT16</td>
<td>Hardware type</td>
</tr>
<tr>
<td>protocoltype</td>
<td>UINT16</td>
<td>Protocol type</td>
</tr>
<tr>
<td>opcode</td>
<td>UINT16, STRING</td>
<td>Opcode</td>
</tr>
<tr>
<td>arpsrcmacaddr</td>
<td>MAC_ADDR</td>
<td>Source MAC address in ARP/RARP packet</td>
</tr>
<tr>
<td>arpdstmacaddr</td>
<td>MAC_ADDR</td>
<td>Destination MAC address in ARP/RARP packet</td>
</tr>
<tr>
<td>arpsrcipaddr</td>
<td>IP_ADDR</td>
<td>Source IP address in ARP/RARP packet</td>
</tr>
nwfilter: Add ARP src/dst IP mask for ebtables ARP Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=862887 Add a netmask for the source and destination IP address for the ebtables --arp-ip-src and --arp-ip-dst options. Extend the XML parser with support for XML attributes for these netmasks similar to already supported netmasks. Extend the documentation. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2014-03-14 06:30:09 +08:00
<tr>
<td>arpsrcipmask <span class="since">(Since 1.2.3)</span></td>
<td>IP_MASK</td>
<td>Source IP mask</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<tr>
<td>arpdstipaddr</td>
<td>IP_ADDR</td>
<td>Destination IP address in ARP/RARP packet</td>
</tr>
nwfilter: Add ARP src/dst IP mask for ebtables ARP Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=862887 Add a netmask for the source and destination IP address for the ebtables --arp-ip-src and --arp-ip-dst options. Extend the XML parser with support for XML attributes for these netmasks similar to already supported netmasks. Extend the documentation. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2014-03-14 06:30:09 +08:00
<tr>
<td>arpdstipmask <span class="since">(Since 1.2.3)</span></td>
<td>IP_MASK</td>
<td>Destination IP mask</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: enable filtering of gratuitous ARP packets This patch enables filtering of gratuitous ARP packets using the following XML: <rule action='accept' direction='in' priority='425'> <arp gratuitous='true'/> </rule>
2011-05-24 07:41:18 +08:00
<tr>
<td>gratuitous <span class="since">(Since 0.9.2)</span></td>
<td>BOOLEAN</td>
<td>boolean indicating whether to check for gratuitous ARP packet</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
Valid strings for the <code>Opcode</code> field are:
Request, Reply, Request_Reverse, Reply_Reverse, DRARP_Request,
DRARP_Reply, DRARP_Error, InARP_Request, ARP_NAK
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoIP">IPv4</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>ip</code>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: Rules of this type should either go into the
<code>root</code> or <code>ipv4</code> chain.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of sender</td>
</tr>
<tr>
<td>dstmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of destination</td>
</tr>
<tr>
<td>dstmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of destination</td>
</tr>
<tr>
<td>srcipaddr</td>
<td>IP_ADDR</td>
<td>Source IP address</td>
</tr>
<tr>
<td>srcipmask</td>
<td>IP_MASK</td>
<td>Mask applied to source IP address</td>
</tr>
<tr>
<td>dstipaddr</td>
<td>IP_ADDR</td>
<td>Destination IP address</td>
</tr>
<tr>
<td>dstipmask</td>
<td>IP_MASK</td>
<td>Mask applied to destination IP address</td>
</tr>
<tr>
<td>protocol</td>
<td>UINT8, STRING</td>
<td>Layer 4 protocol identifier</td>
</tr>
<tr>
<td>srcportstart</td>
<td>UINT16</td>
<td>Start of range of valid source ports; requires <code>protocol</code></td>
</tr>
<tr>
<td>srcportend</td>
<td>UINT16</td>
<td>End of range of valid source ports; requires <code>protocol</code></td>
</tr>
<tr>
<td>dstportstart</td>
<td>UINT16</td>
<td>Start of range of valid destination ports; requires <code>protocol</code></td>
</tr>
<tr>
<td>dstportend</td>
<td>UINT16</td>
<td>End of range of valid destination ports; requires <code>protocol</code></td>
</tr>
docs: nwfilter: add missing dscp attribute Added attribute dscp to below supported protocols table in nwfilter docs. IPV4 (ip) TCP/UDP/SCTP (tcp/udp/sctp) ICMP (icmp) IGMP,ESP,AH,UDPLITE,'ALL' (igmp,esp,ah,udplite,all) TCP/UDP/SCTP over IPV6 (tcp-ipv6,udp-ipv6,sctp-ipv6) ICMPV6 (icmpv6) IGMP,ESP,AH,UDPLITE,'ALL' over IPv6 (igmp-ipv6,esp-ipv6,ah-ipv6,udplite-ipv6,all-ipv6) Here is a simple example: [root@localhost ~]# virsh nwfilter-dumpxml myself <filter name='myself' chain='root'> <uuid>7192ef51-cd50-4f14-ad7b-fa5c69ea19e3</uuid> <rule action='accept' direction='in' priority='500'> <ip dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp-ipv6 dscp='2'/> </rule> <rule action='accept' direction='in' priority='500'> <icmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <icmpv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <udp dscp='3'/> </rule> <rule action='accept' direction='in' priority='500'> <udp-ipv6 dscp='4'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite dscp='5'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite-ipv6 dscp='6'/> </rule> <rule action='accept' direction='in' priority='500'> <esp dscp='7'/> </rule> <rule action='accept' direction='in' priority='500'> <esp-ipv6 dscp='8'/> </rule> <rule action='accept' direction='in' priority='500'> <ah dscp='9'/> </rule> <rule action='accept' direction='in' priority='500'> <ah-ipv6 dscp='10'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp dscp='11'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <igmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all dscp='55'/> </rule> </filter> Signed-off-by: Ján Tomko <jtomko@redhat.com>
2014-08-07 12:27:32 +08:00
<tr>
<td>dscp</td>
<td>UINT8 (0x0-0x3f, 0 - 63)</td>
<td>Differentiated Services Code Point</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
Valid strings for <code>protocol</code> are:
tcp, udp, udplite, esp, ah, icmp, igmp, sctp
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoIPv6">IPv6</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>ipv6</code>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: Rules of this type should either go into the
<code>root</code> or <code>ipv6</code> chain.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of sender</td>
</tr>
<tr>
<td>dstmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of destination</td>
</tr>
<tr>
<td>dstmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of destination</td>
</tr>
<tr>
<td>srcipaddr</td>
<td>IPV6_ADDR</td>
<td>Source IPv6 address</td>
</tr>
<tr>
<td>srcipmask</td>
<td>IPV6_MASK</td>
<td>Mask applied to source IPv6 address</td>
</tr>
<tr>
<td>dstipaddr</td>
<td>IPV6_ADDR</td>
<td>Destination IPv6 address</td>
</tr>
<tr>
<td>dstipmask</td>
<td>IPV6_MASK</td>
<td>Mask applied to destination IPv6 address</td>
</tr>
<tr>
<td>protocol</td>
<td>UINT8</td>
<td>Layer 4 protocol identifier</td>
</tr>
<tr>
<td>srcportstart</td>
<td>UINT16</td>
<td>Start of range of valid source ports; requires <code>protocol</code></td>
</tr>
<tr>
<td>srcportend</td>
<td>UINT16</td>
<td>End of range of valid source ports; requires <code>protocol</code></td>
</tr>
<tr>
<td>dstportstart</td>
<td>UINT16</td>
<td>Start of range of valid destination ports; requires <code>protocol</code></td>
</tr>
<tr>
<td>dstportend</td>
<td>UINT16</td>
<td>End of range of valid destination ports; requires <code>protocol</code></td>
</tr>
nwfilter: Add support for icmpv6 filtering Make use of the ebtables functionality to be able to filter certain parameters of icmpv6 packets. Extend the XML parser for icmpv6 types, type ranges, codes, and code ranges. Extend the nwfilter documentation, schema, and test cases. Being able to filter icmpv6 types and codes helps extending the DHCP snooper for IPv6 and filtering at least some parameters of IPv6's NDP (Neighbor Discovery Protocol) packets. However, the filtering will not be as good as the filtering of ARP packets since we cannot check on IP addresses in the payload of the NDP packets. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2015-01-08 00:41:49 +08:00
<tr>
<td>type<span class="since">(Since 1.2.12)</span></td>
<td>UINT8</td>
<td>ICMPv6 type; requires <code>protocol</code> to be set to <code>icmpv6</code></td>
</tr>
<tr>
<td>typeend<span class="since">(Since 1.2.12)</span></td>
<td>UINT8</td>
<td>ICMPv6 type end of range; requires <code>protocol</code> to be set to <code>icmpv6</code></td>
</tr>
<tr>
<td>code<span class="since">(Since 1.2.12)</span></td>
<td>UINT8</td>
<td>ICMPv6 code; requires <code>protocol</code> to be set to <code>icmpv6</code></td>
</tr>
<tr>
<td>code<span class="since">(Since 1.2.12)</span></td>
<td>UINT8</td>
<td>ICMPv6 code end of range; requires <code>protocol</code> to be set to <code>icmpv6</code></td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
Valid strings for <code>protocol</code> are:
tcp, udp, udplite, esp, ah, icmpv6, sctp
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoTCP-ipv4">TCP/UDP/SCTP</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>tcp</code>, <code>udp</code>, <code>sctp</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: The chain parameter is ignored for this type of traffic
and should either be omitted or set to <code>root</code>.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcipaddr</td>
<td>IP_ADDR</td>
<td>Source IP address</td>
</tr>
<tr>
<td>srcipmask</td>
<td>IP_MASK</td>
<td>Mask applied to source IP address</td>
</tr>
<tr>
<td>dstipaddr</td>
<td>IP_ADDR</td>
<td>Destination IP address</td>
</tr>
<tr>
<td>dstipmask</td>
<td>IP_MASK</td>
<td>Mask applied to destination IP address</td>
</tr>
<tr>
<td>srcipfrom</td>
<td>IP_ADDR</td>
<td>Start of range of source IP address</td>
</tr>
<tr>
<td>srcipto</td>
<td>IP_ADDR</td>
<td>End of range of source IP address</td>
</tr>
<tr>
<td>dstipfrom</td>
<td>IP_ADDR</td>
<td>Start of range of destination IP address</td>
</tr>
<tr>
<td>dstipto</td>
<td>IP_ADDR</td>
<td>End of range of destination IP address</td>
</tr>
<tr>
<td>srcportstart</td>
<td>UINT16</td>
<td>Start of range of valid source ports</td>
</tr>
<tr>
<td>srcportend</td>
<td>UINT16</td>
build: fix HTML errors in nwfilter docs A build on Ubuntu reported: || Generating formatnwfilter.html.tmp /dados/develop/libvirt/docs/formatnwfilter.html.in|390| HTML parser error : Unexpected end tag : p || </p> || ^ /dados/develop/libvirt/docs/formatnwfilter.html.in|705| HTML parser error : Unexpected end tag : code || <td>End of range of valid source ports</code></td> || ^ /dados/develop/libvirt/docs/formatnwfilter.html.in|710| HTML parser error : Unexpected end tag : code || <td>Start of range of valid destination ports</code></td> || ^ * docs/formatnwfilter.html.in: Fix invalid HTML constructs. Reported by Eduardo Otubo.
2010-05-26 07:20:51 +08:00
<td>End of range of valid source ports</td>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</tr>
<tr>
<td>dstportstart</td>
<td>UINT16</td>
build: fix HTML errors in nwfilter docs A build on Ubuntu reported: || Generating formatnwfilter.html.tmp /dados/develop/libvirt/docs/formatnwfilter.html.in|390| HTML parser error : Unexpected end tag : p || </p> || ^ /dados/develop/libvirt/docs/formatnwfilter.html.in|705| HTML parser error : Unexpected end tag : code || <td>End of range of valid source ports</code></td> || ^ /dados/develop/libvirt/docs/formatnwfilter.html.in|710| HTML parser error : Unexpected end tag : code || <td>Start of range of valid destination ports</code></td> || ^ * docs/formatnwfilter.html.in: Fix invalid HTML constructs. Reported by Eduardo Otubo.
2010-05-26 07:20:51 +08:00
<td>Start of range of valid destination ports</td>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</tr>
<tr>
<td>dstportend</td>
<td>UINT16</td>
<td>End of range of valid destination ports</td>
</tr>
docs: nwfilter: add missing dscp attribute Added attribute dscp to below supported protocols table in nwfilter docs. IPV4 (ip) TCP/UDP/SCTP (tcp/udp/sctp) ICMP (icmp) IGMP,ESP,AH,UDPLITE,'ALL' (igmp,esp,ah,udplite,all) TCP/UDP/SCTP over IPV6 (tcp-ipv6,udp-ipv6,sctp-ipv6) ICMPV6 (icmpv6) IGMP,ESP,AH,UDPLITE,'ALL' over IPv6 (igmp-ipv6,esp-ipv6,ah-ipv6,udplite-ipv6,all-ipv6) Here is a simple example: [root@localhost ~]# virsh nwfilter-dumpxml myself <filter name='myself' chain='root'> <uuid>7192ef51-cd50-4f14-ad7b-fa5c69ea19e3</uuid> <rule action='accept' direction='in' priority='500'> <ip dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp-ipv6 dscp='2'/> </rule> <rule action='accept' direction='in' priority='500'> <icmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <icmpv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <udp dscp='3'/> </rule> <rule action='accept' direction='in' priority='500'> <udp-ipv6 dscp='4'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite dscp='5'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite-ipv6 dscp='6'/> </rule> <rule action='accept' direction='in' priority='500'> <esp dscp='7'/> </rule> <rule action='accept' direction='in' priority='500'> <esp-ipv6 dscp='8'/> </rule> <rule action='accept' direction='in' priority='500'> <ah dscp='9'/> </rule> <rule action='accept' direction='in' priority='500'> <ah-ipv6 dscp='10'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp dscp='11'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <igmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all dscp='55'/> </rule> </filter> Signed-off-by: Ján Tomko <jtomko@redhat.com>
2014-08-07 12:27:32 +08:00
<tr>
<td>dscp</td>
<td>UINT8 (0x0-0x3f, 0 - 63)</td>
<td>Differentiated Services Code Point</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: Extend docs with info about the state attribute I am adding a row with information about the newly supported state attribute to each of the tables describing supported attributes of protocols.
2010-10-07 18:45:46 +08:00
<tr>
<td>state <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>comma separated list of NEW,ESTABLISHED,RELATED,INVALID or NONE</td>
</tr>
nwfilters: support for TCP flags evaluation This patch adds support for the evaluation of TCP flags in nwfilters. It adds documentation to the web page and extends the tests as well. Also, the nwfilter schema is extended. The following are some example for rules using the tcp flags: <rule action='accept' direction='in'> <tcp state='NONE' flags='SYN/ALL' dsptportstart='80'/> </rule> <rule action='drop' direction='in'> <tcp state='NONE' flags='SYN/ALL'/> </rule>
2011-04-08 08:13:38 +08:00
<tr>
<td>flags <span class="since">(Since 0.9.1)</span></td>
<td>STRING</td>
<td>TCP-only: format of mask/flags with mask and flags each being a comma separated list of SYN,ACK,URG,PSH,FIN,RST or NONE or ALL</td>
</tr>
nwfilter: Add support for ipset This patch adds support for the recent ipset iptables extension to libvirt's nwfilter subsystem. Ipset allows to maintain 'sets' of IP addresses, ports and other packet parameters and allows for faster lookup (in the order of O(1) vs. O(n)) and rule evaluation to achieve higher throughput than what can be achieved with individual iptables rules. On the command line iptables supports ipset using iptables ... -m set --match-set <ipset name> <flags> -j ... where 'ipset name' is the name of a previously created ipset and flags is a comma-separated list of up to 6 flags. Flags use 'src' and 'dst' for selecting IP addresses, ports etc. from the source or destination part of a packet. So a concrete example may look like this: iptables -A INPUT -m set --match-set test src,src -j ACCEPT Since ipset management is quite complex, the idea was to leave ipset management outside of libvirt but still allow users to reference an ipset. The user would have to make sure the ipset is available once the VM is started so that the iptables rule(s) referencing the ipset can be created. Using XML to describe an ipset in an nwfilter rule would then look as follows: <rule action='accept' direction='in'> <all ipset='test' ipsetflags='src,src'/> </rule> The two parameters on the command line are also the two distinct XML attributes 'ipset' and 'ipsetflags'. FYI: Here is the man page for ipset: https://ipset.netfilter.org/ipset.man.html Regards, Stefan
2012-05-21 18:26:34 +08:00
<tr>
<td>ipset <span class="since">(Since 0.9.13)</span></td>
<td>STRING</td>
<td>The name of an IPSet managed outside of libvirt</td>
</tr>
<tr>
<td>ipsetflags <span class="since">(Since 0.9.13)</span></td>
<td>IPSETFLAGS</td>
<td>flags for the IPSet; requires ipset attribute</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoICMP">ICMP</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>icmp</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: The chain parameter is ignored for this type of traffic
and should either be omitted or set to <code>root</code>.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of sender</td>
</tr>
<tr>
<td>dstmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of destination</td>
</tr>
<tr>
<td>dstmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of destination</td>
</tr>
<tr>
<td>srcipaddr</td>
<td>IP_ADDR</td>
<td>Source IP address</td>
</tr>
<tr>
<td>srcipmask</td>
<td>IP_MASK</td>
<td>Mask applied to source IP address</td>
</tr>
<tr>
<td>dstipaddr</td>
<td>IP_ADDR</td>
<td>Destination IP address</td>
</tr>
<tr>
<td>dstipmask</td>
<td>IP_MASK</td>
<td>Mask applied to destination IP address</td>
</tr>
<tr>
<td>srcipfrom</td>
<td>IP_ADDR</td>
<td>Start of range of source IP address</td>
</tr>
<tr>
<td>srcipto</td>
<td>IP_ADDR</td>
<td>End of range of source IP address</td>
</tr>
<tr>
<td>dstipfrom</td>
<td>IP_ADDR</td>
<td>Start of range of destination IP address</td>
</tr>
<tr>
<td>dstipto</td>
<td>IP_ADDR</td>
<td>End of range of destination IP address</td>
</tr>
<tr>
<td>type</td>
<td>UINT16</td>
<td>ICMP type</td>
</tr>
<tr>
<td>code</td>
<td>UINT16</td>
<td>ICMP code</td>
</tr>
docs: nwfilter: add missing dscp attribute Added attribute dscp to below supported protocols table in nwfilter docs. IPV4 (ip) TCP/UDP/SCTP (tcp/udp/sctp) ICMP (icmp) IGMP,ESP,AH,UDPLITE,'ALL' (igmp,esp,ah,udplite,all) TCP/UDP/SCTP over IPV6 (tcp-ipv6,udp-ipv6,sctp-ipv6) ICMPV6 (icmpv6) IGMP,ESP,AH,UDPLITE,'ALL' over IPv6 (igmp-ipv6,esp-ipv6,ah-ipv6,udplite-ipv6,all-ipv6) Here is a simple example: [root@localhost ~]# virsh nwfilter-dumpxml myself <filter name='myself' chain='root'> <uuid>7192ef51-cd50-4f14-ad7b-fa5c69ea19e3</uuid> <rule action='accept' direction='in' priority='500'> <ip dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp-ipv6 dscp='2'/> </rule> <rule action='accept' direction='in' priority='500'> <icmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <icmpv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <udp dscp='3'/> </rule> <rule action='accept' direction='in' priority='500'> <udp-ipv6 dscp='4'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite dscp='5'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite-ipv6 dscp='6'/> </rule> <rule action='accept' direction='in' priority='500'> <esp dscp='7'/> </rule> <rule action='accept' direction='in' priority='500'> <esp-ipv6 dscp='8'/> </rule> <rule action='accept' direction='in' priority='500'> <ah dscp='9'/> </rule> <rule action='accept' direction='in' priority='500'> <ah-ipv6 dscp='10'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp dscp='11'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <igmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all dscp='55'/> </rule> </filter> Signed-off-by: Ján Tomko <jtomko@redhat.com>
2014-08-07 12:27:32 +08:00
<tr>
<td>dscp</td>
<td>UINT8 (0x0-0x3f, 0 - 63)</td>
<td>Differentiated Services Code Point</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: Extend docs with info about the state attribute I am adding a row with information about the newly supported state attribute to each of the tables describing supported attributes of protocols.
2010-10-07 18:45:46 +08:00
<tr>
<td>state <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>comma separated list of NEW,ESTABLISHED,RELATED,INVALID or NONE</td>
</tr>
nwfilter: Add support for ipset This patch adds support for the recent ipset iptables extension to libvirt's nwfilter subsystem. Ipset allows to maintain 'sets' of IP addresses, ports and other packet parameters and allows for faster lookup (in the order of O(1) vs. O(n)) and rule evaluation to achieve higher throughput than what can be achieved with individual iptables rules. On the command line iptables supports ipset using iptables ... -m set --match-set <ipset name> <flags> -j ... where 'ipset name' is the name of a previously created ipset and flags is a comma-separated list of up to 6 flags. Flags use 'src' and 'dst' for selecting IP addresses, ports etc. from the source or destination part of a packet. So a concrete example may look like this: iptables -A INPUT -m set --match-set test src,src -j ACCEPT Since ipset management is quite complex, the idea was to leave ipset management outside of libvirt but still allow users to reference an ipset. The user would have to make sure the ipset is available once the VM is started so that the iptables rule(s) referencing the ipset can be created. Using XML to describe an ipset in an nwfilter rule would then look as follows: <rule action='accept' direction='in'> <all ipset='test' ipsetflags='src,src'/> </rule> The two parameters on the command line are also the two distinct XML attributes 'ipset' and 'ipsetflags'. FYI: Here is the man page for ipset: https://ipset.netfilter.org/ipset.man.html Regards, Stefan
2012-05-21 18:26:34 +08:00
<tr>
<td>ipset <span class="since">(Since 0.9.13)</span></td>
<td>STRING</td>
<td>The name of an IPSet managed outside of libvirt</td>
</tr>
<tr>
<td>ipsetflags <span class="since">(Since 0.9.13)</span></td>
<td>IPSETFLAGS</td>
<td>flags for the IPSet; requires ipset attribute</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoMisc">IGMP, ESP, AH, UDPLITE, 'ALL'</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>igmp</code>, <code>esp</code>, <code>ah</code>, <code>udplite</code>, <code>all</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: The chain parameter is ignored for this type of traffic
and should either be omitted or set to <code>root</code>.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of sender</td>
</tr>
<tr>
<td>dstmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of destination</td>
</tr>
<tr>
<td>dstmacmask</td>
<td>MAC_MASK</td>
<td>Mask applied to MAC address of destination</td>
</tr>
<tr>
<td>srcipaddr</td>
<td>IP_ADDR</td>
<td>Source IP address</td>
</tr>
<tr>
<td>srcipmask</td>
<td>IP_MASK</td>
<td>Mask applied to source IP address</td>
</tr>
<tr>
<td>dstipaddr</td>
<td>IP_ADDR</td>
<td>Destination IP address</td>
</tr>
<tr>
<td>dstipmask</td>
<td>IP_MASK</td>
<td>Mask applied to destination IP address</td>
</tr>
<tr>
<td>srcipfrom</td>
<td>IP_ADDR</td>
<td>Start of range of source IP address</td>
</tr>
<tr>
<td>srcipto</td>
<td>IP_ADDR</td>
<td>End of range of source IP address</td>
</tr>
<tr>
<td>dstipfrom</td>
<td>IP_ADDR</td>
<td>Start of range of destination IP address</td>
</tr>
<tr>
<td>dstipto</td>
<td>IP_ADDR</td>
<td>End of range of destination IP address</td>
</tr>
docs: nwfilter: add missing dscp attribute Added attribute dscp to below supported protocols table in nwfilter docs. IPV4 (ip) TCP/UDP/SCTP (tcp/udp/sctp) ICMP (icmp) IGMP,ESP,AH,UDPLITE,'ALL' (igmp,esp,ah,udplite,all) TCP/UDP/SCTP over IPV6 (tcp-ipv6,udp-ipv6,sctp-ipv6) ICMPV6 (icmpv6) IGMP,ESP,AH,UDPLITE,'ALL' over IPv6 (igmp-ipv6,esp-ipv6,ah-ipv6,udplite-ipv6,all-ipv6) Here is a simple example: [root@localhost ~]# virsh nwfilter-dumpxml myself <filter name='myself' chain='root'> <uuid>7192ef51-cd50-4f14-ad7b-fa5c69ea19e3</uuid> <rule action='accept' direction='in' priority='500'> <ip dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp-ipv6 dscp='2'/> </rule> <rule action='accept' direction='in' priority='500'> <icmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <icmpv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <udp dscp='3'/> </rule> <rule action='accept' direction='in' priority='500'> <udp-ipv6 dscp='4'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite dscp='5'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite-ipv6 dscp='6'/> </rule> <rule action='accept' direction='in' priority='500'> <esp dscp='7'/> </rule> <rule action='accept' direction='in' priority='500'> <esp-ipv6 dscp='8'/> </rule> <rule action='accept' direction='in' priority='500'> <ah dscp='9'/> </rule> <rule action='accept' direction='in' priority='500'> <ah-ipv6 dscp='10'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp dscp='11'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <igmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all dscp='55'/> </rule> </filter> Signed-off-by: Ján Tomko <jtomko@redhat.com>
2014-08-07 12:27:32 +08:00
<tr>
<td>dscp</td>
<td>UINT8 (0x0-0x3f, 0 - 63)</td>
<td>Differentiated Services Code Point</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: Extend docs with info about the state attribute I am adding a row with information about the newly supported state attribute to each of the tables describing supported attributes of protocols.
2010-10-07 18:45:46 +08:00
<tr>
<td>state <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>comma separated list of NEW,ESTABLISHED,RELATED,INVALID or NONE</td>
</tr>
nwfilter: Add support for ipset This patch adds support for the recent ipset iptables extension to libvirt's nwfilter subsystem. Ipset allows to maintain 'sets' of IP addresses, ports and other packet parameters and allows for faster lookup (in the order of O(1) vs. O(n)) and rule evaluation to achieve higher throughput than what can be achieved with individual iptables rules. On the command line iptables supports ipset using iptables ... -m set --match-set <ipset name> <flags> -j ... where 'ipset name' is the name of a previously created ipset and flags is a comma-separated list of up to 6 flags. Flags use 'src' and 'dst' for selecting IP addresses, ports etc. from the source or destination part of a packet. So a concrete example may look like this: iptables -A INPUT -m set --match-set test src,src -j ACCEPT Since ipset management is quite complex, the idea was to leave ipset management outside of libvirt but still allow users to reference an ipset. The user would have to make sure the ipset is available once the VM is started so that the iptables rule(s) referencing the ipset can be created. Using XML to describe an ipset in an nwfilter rule would then look as follows: <rule action='accept' direction='in'> <all ipset='test' ipsetflags='src,src'/> </rule> The two parameters on the command line are also the two distinct XML attributes 'ipset' and 'ipsetflags'. FYI: Here is the man page for ipset: https://ipset.netfilter.org/ipset.man.html Regards, Stefan
2012-05-21 18:26:34 +08:00
<tr>
<td>ipset <span class="since">(Since 0.9.13)</span></td>
<td>STRING</td>
<td>The name of an IPSet managed outside of libvirt</td>
</tr>
<tr>
<td>ipsetflags <span class="since">(Since 0.9.13)</span></td>
<td>IPSETFLAGS</td>
<td>flags for the IPSet; requires ipset attribute</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoTCP-ipv6">TCP/UDP/SCTP over IPV6</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>tcp-ipv6</code>, <code>udp-ipv6</code>, <code>sctp-ipv6</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: The chain parameter is ignored for this type of traffic
and should either be omitted or set to <code>root</code>.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcipaddr</td>
<td>IPV6_ADDR</td>
<td>Source IP address</td>
</tr>
<tr>
<td>srcipmask</td>
<td>IPV6_MASK</td>
<td>Mask applied to source IP address</td>
</tr>
<tr>
<td>dstipaddr</td>
<td>IPV6_ADDR</td>
<td>Destination IP address</td>
</tr>
<tr>
<td>dstipmask</td>
<td>IPV6_MASK</td>
<td>Mask applied to destination IP address</td>
</tr>
<tr>
<td>srcipfrom</td>
<td>IPV6_ADDR</td>
<td>Start of range of source IP address</td>
</tr>
<tr>
<td>srcipto</td>
<td>IPV6_ADDR</td>
<td>End of range of source IP address</td>
</tr>
<tr>
<td>dstipfrom</td>
<td>IPV6_ADDR</td>
<td>Start of range of destination IP address</td>
</tr>
<tr>
<td>dstipto</td>
<td>IPV6_ADDR</td>
<td>End of range of destination IP address</td>
</tr>
<tr>
<td>srcportstart</td>
<td>UINT16</td>
<td>Start of range of valid source ports</td>
</tr>
<tr>
<td>srcportend</td>
<td>UINT16</td>
<td>End of range of valid source ports</td>
</tr>
<tr>
<td>dstportstart</td>
<td>UINT16</td>
<td>Start of range of valid destination ports</td>
</tr>
<tr>
<td>dstportend</td>
<td>UINT16</td>
<td>End of range of valid destination ports</td>
</tr>
docs: nwfilter: add missing dscp attribute Added attribute dscp to below supported protocols table in nwfilter docs. IPV4 (ip) TCP/UDP/SCTP (tcp/udp/sctp) ICMP (icmp) IGMP,ESP,AH,UDPLITE,'ALL' (igmp,esp,ah,udplite,all) TCP/UDP/SCTP over IPV6 (tcp-ipv6,udp-ipv6,sctp-ipv6) ICMPV6 (icmpv6) IGMP,ESP,AH,UDPLITE,'ALL' over IPv6 (igmp-ipv6,esp-ipv6,ah-ipv6,udplite-ipv6,all-ipv6) Here is a simple example: [root@localhost ~]# virsh nwfilter-dumpxml myself <filter name='myself' chain='root'> <uuid>7192ef51-cd50-4f14-ad7b-fa5c69ea19e3</uuid> <rule action='accept' direction='in' priority='500'> <ip dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp-ipv6 dscp='2'/> </rule> <rule action='accept' direction='in' priority='500'> <icmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <icmpv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <udp dscp='3'/> </rule> <rule action='accept' direction='in' priority='500'> <udp-ipv6 dscp='4'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite dscp='5'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite-ipv6 dscp='6'/> </rule> <rule action='accept' direction='in' priority='500'> <esp dscp='7'/> </rule> <rule action='accept' direction='in' priority='500'> <esp-ipv6 dscp='8'/> </rule> <rule action='accept' direction='in' priority='500'> <ah dscp='9'/> </rule> <rule action='accept' direction='in' priority='500'> <ah-ipv6 dscp='10'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp dscp='11'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <igmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all dscp='55'/> </rule> </filter> Signed-off-by: Ján Tomko <jtomko@redhat.com>
2014-08-07 12:27:32 +08:00
<tr>
<td>dscp</td>
<td>UINT8 (0x0-0x3f, 0 - 63)</td>
<td>Differentiated Services Code Point</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: Extend docs with info about the state attribute I am adding a row with information about the newly supported state attribute to each of the tables describing supported attributes of protocols.
2010-10-07 18:45:46 +08:00
<tr>
<td>state <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>comma separated list of NEW,ESTABLISHED,RELATED,INVALID or NONE</td>
</tr>
nwfilters: support for TCP flags evaluation This patch adds support for the evaluation of TCP flags in nwfilters. It adds documentation to the web page and extends the tests as well. Also, the nwfilter schema is extended. The following are some example for rules using the tcp flags: <rule action='accept' direction='in'> <tcp state='NONE' flags='SYN/ALL' dsptportstart='80'/> </rule> <rule action='drop' direction='in'> <tcp state='NONE' flags='SYN/ALL'/> </rule>
2011-04-08 08:13:38 +08:00
<tr>
<td>flags <span class="since">(Since 0.9.1)</span></td>
<td>STRING</td>
<td>TCP-only: format of mask/flags with mask and flags each being a comma separated list of SYN,ACK,URG,PSH,FIN,RST or NONE or ALL</td>
</tr>
nwfilter: Add support for ipset This patch adds support for the recent ipset iptables extension to libvirt's nwfilter subsystem. Ipset allows to maintain 'sets' of IP addresses, ports and other packet parameters and allows for faster lookup (in the order of O(1) vs. O(n)) and rule evaluation to achieve higher throughput than what can be achieved with individual iptables rules. On the command line iptables supports ipset using iptables ... -m set --match-set <ipset name> <flags> -j ... where 'ipset name' is the name of a previously created ipset and flags is a comma-separated list of up to 6 flags. Flags use 'src' and 'dst' for selecting IP addresses, ports etc. from the source or destination part of a packet. So a concrete example may look like this: iptables -A INPUT -m set --match-set test src,src -j ACCEPT Since ipset management is quite complex, the idea was to leave ipset management outside of libvirt but still allow users to reference an ipset. The user would have to make sure the ipset is available once the VM is started so that the iptables rule(s) referencing the ipset can be created. Using XML to describe an ipset in an nwfilter rule would then look as follows: <rule action='accept' direction='in'> <all ipset='test' ipsetflags='src,src'/> </rule> The two parameters on the command line are also the two distinct XML attributes 'ipset' and 'ipsetflags'. FYI: Here is the man page for ipset: https://ipset.netfilter.org/ipset.man.html Regards, Stefan
2012-05-21 18:26:34 +08:00
<tr>
<td>ipset <span class="since">(Since 0.9.13)</span></td>
<td>STRING</td>
<td>The name of an IPSet managed outside of libvirt</td>
</tr>
<tr>
<td>ipsetflags <span class="since">(Since 0.9.13)</span></td>
<td>IPSETFLAGS</td>
<td>flags for the IPSet; requires ipset attribute</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoICMPv6">ICMPv6</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Protocol ID: <code>icmpv6</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: The chain parameter is ignored for this type of traffic
and should either be omitted or set to <code>root</code>.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcipaddr</td>
<td>IPV6_ADDR</td>
<td>Source IPv6 address</td>
</tr>
<tr>
<td>srcipmask</td>
<td>IPV6_MASK</td>
<td>Mask applied to source IPv6 address</td>
</tr>
<tr>
<td>dstipaddr</td>
<td>IPV6_ADDR</td>
<td>Destination IPv6 address</td>
</tr>
<tr>
<td>dstipmask</td>
<td>IPV6_MASK</td>
<td>Mask applied to destination IPv6 address</td>
</tr>
<tr>
<td>srcipfrom</td>
<td>IPV6_ADDR</td>
<td>Start of range of source IP address</td>
</tr>
<tr>
<td>srcipto</td>
<td>IPV6_ADDR</td>
<td>End of range of source IP address</td>
</tr>
<tr>
<td>dstipfrom</td>
<td>IPV6_ADDR</td>
<td>Start of range of destination IP address</td>
</tr>
<tr>
<td>dstipto</td>
<td>IPV6_ADDR</td>
<td>End of range of destination IP address</td>
</tr>
<tr>
<td>type</td>
<td>UINT16</td>
<td>ICMPv6 type</td>
</tr>
<tr>
<td>code</td>
<td>UINT16</td>
<td>ICMPv6 code</td>
</tr>
docs: nwfilter: add missing dscp attribute Added attribute dscp to below supported protocols table in nwfilter docs. IPV4 (ip) TCP/UDP/SCTP (tcp/udp/sctp) ICMP (icmp) IGMP,ESP,AH,UDPLITE,'ALL' (igmp,esp,ah,udplite,all) TCP/UDP/SCTP over IPV6 (tcp-ipv6,udp-ipv6,sctp-ipv6) ICMPV6 (icmpv6) IGMP,ESP,AH,UDPLITE,'ALL' over IPv6 (igmp-ipv6,esp-ipv6,ah-ipv6,udplite-ipv6,all-ipv6) Here is a simple example: [root@localhost ~]# virsh nwfilter-dumpxml myself <filter name='myself' chain='root'> <uuid>7192ef51-cd50-4f14-ad7b-fa5c69ea19e3</uuid> <rule action='accept' direction='in' priority='500'> <ip dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp-ipv6 dscp='2'/> </rule> <rule action='accept' direction='in' priority='500'> <icmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <icmpv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <udp dscp='3'/> </rule> <rule action='accept' direction='in' priority='500'> <udp-ipv6 dscp='4'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite dscp='5'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite-ipv6 dscp='6'/> </rule> <rule action='accept' direction='in' priority='500'> <esp dscp='7'/> </rule> <rule action='accept' direction='in' priority='500'> <esp-ipv6 dscp='8'/> </rule> <rule action='accept' direction='in' priority='500'> <ah dscp='9'/> </rule> <rule action='accept' direction='in' priority='500'> <ah-ipv6 dscp='10'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp dscp='11'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <igmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all dscp='55'/> </rule> </filter> Signed-off-by: Ján Tomko <jtomko@redhat.com>
2014-08-07 12:27:32 +08:00
<tr>
<td>dscp</td>
<td>UINT8 (0x0-0x3f, 0 - 63)</td>
<td>Differentiated Services Code Point</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: Extend docs with info about the state attribute I am adding a row with information about the newly supported state attribute to each of the tables describing supported attributes of protocols.
2010-10-07 18:45:46 +08:00
<tr>
<td>state <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>comma separated list of NEW,ESTABLISHED,RELATED,INVALID or NONE</td>
</tr>
nwfilter: Add support for ipset This patch adds support for the recent ipset iptables extension to libvirt's nwfilter subsystem. Ipset allows to maintain 'sets' of IP addresses, ports and other packet parameters and allows for faster lookup (in the order of O(1) vs. O(n)) and rule evaluation to achieve higher throughput than what can be achieved with individual iptables rules. On the command line iptables supports ipset using iptables ... -m set --match-set <ipset name> <flags> -j ... where 'ipset name' is the name of a previously created ipset and flags is a comma-separated list of up to 6 flags. Flags use 'src' and 'dst' for selecting IP addresses, ports etc. from the source or destination part of a packet. So a concrete example may look like this: iptables -A INPUT -m set --match-set test src,src -j ACCEPT Since ipset management is quite complex, the idea was to leave ipset management outside of libvirt but still allow users to reference an ipset. The user would have to make sure the ipset is available once the VM is started so that the iptables rule(s) referencing the ipset can be created. Using XML to describe an ipset in an nwfilter rule would then look as follows: <rule action='accept' direction='in'> <all ipset='test' ipsetflags='src,src'/> </rule> The two parameters on the command line are also the two distinct XML attributes 'ipset' and 'ipsetflags'. FYI: Here is the man page for ipset: https://ipset.netfilter.org/ipset.man.html Regards, Stefan
2012-05-21 18:26:34 +08:00
<tr>
<td>ipset <span class="since">(Since 0.9.13)</span></td>
<td>STRING</td>
<td>The name of an IPSet managed outside of libvirt</td>
</tr>
<tr>
<td>ipsetflags <span class="since">(Since 0.9.13)</span></td>
<td>IPSETFLAGS</td>
<td>flags for the IPSet; requires ipset attribute</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h5><a id="nwfelemsRulesProtoMiscv6">ESP, AH, UDPLITE, 'ALL' over IPv6</a></h5>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
docs: remove reference to non-existent "igmp-ipv6" protocol IGMP is used on IPv4 networks tp setup multicast group memberships. On IPv6, this job is done by Multicast Listener Discovery (MLD), which uses ICMPv6 packets rather than its own IP protocol number like IGMP. The nwfilter documentation lists "igmp-ipv6" as one of the possible protocols, but this is ignored (and stripped from the xml). This patch removes that erroneous reference. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1038888
2016-04-22 02:32:51 +08:00
Protocol ID: <code>esp-ipv6</code>, <code>ah-ipv6</code>, <code>udplite-ipv6</code>, <code>all-ipv6</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
Note: The chain parameter is ignored for this type of traffic
and should either be omitted or set to <code>root</code>.
</p>
<table class="top_table">
<tr>
<th> Attribute </th>
<th> Datatype </th>
<th> Semantics </th>
</tr>
<tr>
<td>srcmacaddr</td>
<td>MAC_ADDR</td>
<td>MAC address of sender</td>
</tr>
<tr>
<td>srcipaddr</td>
<td>IPV6_ADDR</td>
<td>Source IPv6 address</td>
</tr>
<tr>
<td>srcipmask</td>
<td>IPV6_MASK</td>
<td>Mask applied to source IPv6 address</td>
</tr>
<tr>
<td>dstipaddr</td>
<td>IPV6_ADDR</td>
<td>Destination IPv6 address</td>
</tr>
<tr>
<td>dstipmask</td>
<td>IPV6_MASK</td>
<td>Mask applied to destination IPv6 address</td>
</tr>
<tr>
<td>srcipfrom</td>
<td>IPV6_ADDR</td>
<td>Start of range of source IP address</td>
</tr>
<tr>
<td>srcipto</td>
<td>IPV6_ADDR</td>
<td>End of range of source IP address</td>
</tr>
<tr>
<td>dstipfrom</td>
<td>IPV6_ADDR</td>
<td>Start of range of destination IP address</td>
</tr>
<tr>
<td>dstipto</td>
<td>IPV6_ADDR</td>
<td>End of range of destination IP address</td>
</tr>
docs: nwfilter: add missing dscp attribute Added attribute dscp to below supported protocols table in nwfilter docs. IPV4 (ip) TCP/UDP/SCTP (tcp/udp/sctp) ICMP (icmp) IGMP,ESP,AH,UDPLITE,'ALL' (igmp,esp,ah,udplite,all) TCP/UDP/SCTP over IPV6 (tcp-ipv6,udp-ipv6,sctp-ipv6) ICMPV6 (icmpv6) IGMP,ESP,AH,UDPLITE,'ALL' over IPv6 (igmp-ipv6,esp-ipv6,ah-ipv6,udplite-ipv6,all-ipv6) Here is a simple example: [root@localhost ~]# virsh nwfilter-dumpxml myself <filter name='myself' chain='root'> <uuid>7192ef51-cd50-4f14-ad7b-fa5c69ea19e3</uuid> <rule action='accept' direction='in' priority='500'> <ip dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp dscp='1'/> </rule> <rule action='accept' direction='in' priority='500'> <tcp-ipv6 dscp='2'/> </rule> <rule action='accept' direction='in' priority='500'> <icmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <icmpv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <udp dscp='3'/> </rule> <rule action='accept' direction='in' priority='500'> <udp-ipv6 dscp='4'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite dscp='5'/> </rule> <rule action='accept' direction='in' priority='500'> <udplite-ipv6 dscp='6'/> </rule> <rule action='accept' direction='in' priority='500'> <esp dscp='7'/> </rule> <rule action='accept' direction='in' priority='500'> <esp-ipv6 dscp='8'/> </rule> <rule action='accept' direction='in' priority='500'> <ah dscp='9'/> </rule> <rule action='accept' direction='in' priority='500'> <ah-ipv6 dscp='10'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp dscp='11'/> </rule> <rule action='accept' direction='in' priority='500'> <sctp-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <igmp dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all-ipv6 dscp='55'/> </rule> <rule action='accept' direction='in' priority='500'> <all dscp='55'/> </rule> </filter> Signed-off-by: Ján Tomko <jtomko@redhat.com>
2014-08-07 12:27:32 +08:00
<tr>
<td>dscp</td>
<td>UINT8 (0x0-0x3f, 0 - 63)</td>
<td>Differentiated Services Code Point</td>
</tr>
nwfilter: Extend docs with information about comment attr. I am adding a row with information about the newly supported comment attribute to each of the tables describing supported attributes of protocols.
2010-10-01 04:01:51 +08:00
<tr>
<td>comment <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>text with max. 256 characters</td>
</tr>
nwfilter: Extend docs with info about the state attribute I am adding a row with information about the newly supported state attribute to each of the tables describing supported attributes of protocols.
2010-10-07 18:45:46 +08:00
<tr>
<td>state <span class="since">(Since 0.8.5)</span></td>
<td>STRING</td>
<td>comma separated list of NEW,ESTABLISHED,RELATED,INVALID or NONE</td>
</tr>
nwfilter: Add support for ipset This patch adds support for the recent ipset iptables extension to libvirt's nwfilter subsystem. Ipset allows to maintain 'sets' of IP addresses, ports and other packet parameters and allows for faster lookup (in the order of O(1) vs. O(n)) and rule evaluation to achieve higher throughput than what can be achieved with individual iptables rules. On the command line iptables supports ipset using iptables ... -m set --match-set <ipset name> <flags> -j ... where 'ipset name' is the name of a previously created ipset and flags is a comma-separated list of up to 6 flags. Flags use 'src' and 'dst' for selecting IP addresses, ports etc. from the source or destination part of a packet. So a concrete example may look like this: iptables -A INPUT -m set --match-set test src,src -j ACCEPT Since ipset management is quite complex, the idea was to leave ipset management outside of libvirt but still allow users to reference an ipset. The user would have to make sure the ipset is available once the VM is started so that the iptables rule(s) referencing the ipset can be created. Using XML to describe an ipset in an nwfilter rule would then look as follows: <rule action='accept' direction='in'> <all ipset='test' ipsetflags='src,src'/> </rule> The two parameters on the command line are also the two distinct XML attributes 'ipset' and 'ipsetflags'. FYI: Here is the man page for ipset: https://ipset.netfilter.org/ipset.man.html Regards, Stefan
2012-05-21 18:26:34 +08:00
<tr>
<td>ipset <span class="since">(Since 0.9.13)</span></td>
<td>STRING</td>
<td>The name of an IPSet managed outside of libvirt</td>
</tr>
<tr>
<td>ipsetflags <span class="since">(Since 0.9.13)</span></td>
<td>IPSETFLAGS</td>
<td>flags for the IPSet; requires ipset attribute</td>
</tr>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</table>
<p>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfelemsRulesAdv">Advanced Filter Configuration Topics</a></h3>
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
<p>
The following sections discuss advanced filter configuration
topics.
</p>
nwfilter: add DHCP snooping This patch adds DHCP snooping support to libvirt. The learning method for IP addresses is specified by setting the "CTRL_IP_LEARNING" variable to one of "any" [default] (existing IP learning code), "none" (static only addresses) or "dhcp" (DHCP snooping). Active leases are saved in a lease file and reloaded on restart or HUP. The following interface XML activates and uses the DHCP snooping: <interface type='bridge'> <source bridge='virbr0'/> <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref> </interface> All filters containing the variable 'IP' are automatically adjusted when the VM receives an IP address via DHCP. However, multiple IP addresses per interface are silently ignored in this patch, thus only supporting one IP address per interface. Multiple IP address support is added in a later patch in this series. Signed-off-by: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2012-06-02 07:32:06 +08:00
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h4><a id="nwfelemsRulesAdvTracking">Connection tracking</a></h4>
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
<p>
The network filtering subsystem (on Linux) makes use of the connection
tracking support of iptables. This helps in enforcing the
directionality of network traffic (state match) as well as
counting and limiting the number of simultaneous connections towards
a VM. As an example, if a VM has TCP port 8080
open as a server, clients may connect to the VM on port 8080.
Connection tracking and enforcement of directionality then prevents
the VM from initiating a connection from
(TCP client) port 8080 to the host back to a remote host.
More importantly, tracking helps to prevent
remote attackers from establishing a connection back to a VM. For example,
if the user inside the VM established a connection to
port 80 on an attacker site, then the attacker will not be able to
initiate a connection from TCP port 80 back towards the VM.
By default the connection state match that enables connection tracking
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
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and then enforcement of directionality of traffic is turned on. <br/>
docs: fix a typo in formatnwfilter s/fragement/fragment Signed-off-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
2013-11-06 15:38:00 +08:00
The following shows an example XML fragment where this feature has been
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
turned off for incoming connections to TCP port 12345.
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
[...]
&lt;rule direction='in' action='accept' statematch='false'&gt;
&lt;tcp dstportstart='12345'/&gt;
&lt;/rule&gt;
[...]
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
</pre>
<p>
This now allows incoming traffic to TCP port 12345, but would also
enable the initiation from (client) TCP port 12345 within the VM,
which may or may not be desirable.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h4><a id="nwfelemsRulesAdvLimiting">Limiting Number of Connections</a></h4>
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
<p>
To limit the number of connections a VM may establish, a rule must
be provided that sets a limit of connections for a given
type of traffic. If for example a VM
is supposed to be allowed to only ping one other IP address at a time
and is supposed to have only one active incoming ssh connection at a
time, the following XML fragment can be used to achieve this.
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
[...]
&lt;rule action='drop' direction='in' priority='400'&gt;
&lt;tcp connlimit-above='1'/&gt;
&lt;/rule&gt;
&lt;rule action='accept' direction='in' priority='500'&gt;
&lt;tcp dstportstart='22'/&gt;
&lt;/rule&gt;
&lt;rule action='drop' direction='out' priority='400'&gt;
&lt;icmp connlimit-above='1'/&gt;
&lt;/rule&gt;
&lt;rule action='accept' direction='out' priority='500'&gt;
&lt;icmp/&gt;
&lt;/rule&gt;
&lt;rule action='accept' direction='out' priority='500'&gt;
&lt;udp dstportstart='53'/&gt;
&lt;/rule&gt;
&lt;rule action='drop' direction='inout' priority='1000'&gt;
&lt;all/&gt;
&lt;/rule&gt;
[...]
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
</pre>
<p>
Note that the rule for the limit has to logically appear
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
before the rule for accepting the traffic.<br/>
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
An additional rule for letting DNS traffic to port 22
go out the VM has been added to avoid ssh sessions not
getting established for reasons related to DNS lookup failures
by the ssh daemon. Leaving this rule out may otherwise lead to
fun-filled debugging joy (symptom: ssh client seems to hang
while trying to connect).
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
Lot of care must be taken with timeouts related
to tracking of traffic. An ICMP ping that
the user may have terminated inside the VM may have a long
timeout in the host's connection tracking system and therefore
not allow another ICMP ping to go through for a while. Therefore,
the timeouts have to be tuned in the host's sysfs, i.e.,
</p>
<pre>
formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-11-12 06:40:27 +08:00
echo 3 > /proc/sys/net/netfilter/nf_conntrack_icmp_timeout
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
</pre>
<p>
sets the ICMP connection tracking timeout to 3 seconds. The
effect of this is that once one ping is terminated, another
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
one can start after 3 seconds.<br/>
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
Further, we want to point out that a client that for whatever
reason has not properly closed a TCP connection may cause a
connection to be held open for a longer period of time,
depending to what timeout the <code>TCP established</code> state
timeout has been set to on the host. Also, idle connections may time
out in the connection tracking system but can be reactivated once
packets are exchanged. However, a newly initiated connection may force
an idle connection into TCP backoff if the number of allowed connections
is set to a too low limit, the new connection is established
and hits (not exceeds) the limit of allowed connections and for
example a key is pressed on the old ssh session, which now has become
unresponsive due to its traffic being dropped.
Therefore, the limit of connections should be rather high so that
fluctuations in new TCP connections don't cause odd
Fix some typos in messages, docs and comments.
2012-08-23 02:29:18 +08:00
traffic behavior in relation to idle connections.
nwfilter: extensions of docs with As requested, here a couple of paragraphs about the recently added statematch attribute and some advanced (and tricky) traffic filtering topics.
2010-06-19 01:44:17 +08:00
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h2><a id="nwfcli">Command line tools</a></h2>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
The libvirt command line tool <code>virsh</code> has been extended
with life-cycle support for network filters. All commands related
to the network filtering subsystem start with the prefix
<code>nwfilter</code>. The following commands are available:
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
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</p>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<ul>
<li>nwfilter-list : list UUIDs and names of all network filters</li>
<li>nwfilter-define : define a new network filter or update an existing one</li>
<li>nwfilter-undefine : delete a network filter given its name; it must not be currently in use</li>
<li>nwfilter-dumpxml : display a network filter given its name</li>
<li>nwfilter-edit : edit a network filter given its name</li>
</ul>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h2><a id="nwfexamples">Pre-existing network filters</a></h2>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
The following is a list of example network filters that are
automatically installed with libvirt.</p>
<table class="top_table">
<tr>
<th> Name </th>
<th> Description </th>
</tr>
<tr>
<td> no-arp-spoofing </td>
<td> Prevent a VM from spoofing ARP traffic; this filter
only allows ARP request and reply messages and enforces
that those packets contain the MAC and IP addresses
of the VM.</td>
</tr>
<tr>
<td> allow-dhcp </td>
<td> Allow a VM to request an IP address via DHCP (from any
DHCP server)</td>
</tr>
<tr>
<td> allow-dhcp-server </td>
<td> Allow a VM to request an IP address from a specified
DHCP server. The dotted decimal IP address of the DHCP
server must be provided in a reference to this filter.
The name of the variable must be <i>DHCPSERVER</i>.</td>
</tr>
<tr>
<td> no-ip-spoofing </td>
<td> Prevent a VM from sending of IP packets with
a source IP address different from the one
in the packet. </td>
</tr>
<tr>
<td> no-ip-multicast </td>
<td> Prevent a VM from sending IP multicast packets. </td>
</tr>
<tr>
<td> clean-traffic </td>
<td> Prevent MAC, IP and ARP spoofing. This filter references
several other filters as building blocks. </td>
</tr>
</table>
<p>
Note that most of the above filters are only building blocks and
require a combination with other filters to provide useful network
traffic filtering.
The most useful one in the above list is the <i>clean-traffic</i>
filter. This filter itself can for example be combined with the
<i>no-ip-multicast</i>
filter to prevent virtual machines from sending IP multicast traffic
on top of the prevention of packet spoofing.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h2><a id="nwfwrite">Writing your own filters</a></h2>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
Since libvirt only provides a couple of example networking filters, you
may consider writing your own. When planning on doing so
there are a couple of things
you may need to know regarding the network filtering subsystem and how
it works internally. Certainly you also have to know and understand
the protocols very well that you want to be filtering on so that
no further traffic than what you want can pass and that in fact the
traffic you want to allow does pass.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
The network filtering subsystem is currently only available on
doc: fix writing of QEMU QEMU should be written all upper or all lower case.
2017-03-08 01:09:58 +08:00
Linux hosts and only works for QEMU and KVM type of virtual machines.
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
On Linux
it builds upon the support for <code>ebtables</code>, <code>iptables
</code> and <code>ip6tables</code> and makes use of their features.
From the above list of supported protocols the following ones are
implemented using <code>ebtables</code>:
</p>
<ul>
<li>mac</li>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<li>stp (spanning tree protocol)</li>
<li>vlan (802.1Q)</li>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<li>arp, rarp</li>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<li>ipv4</li>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<li>ipv6</li>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
</ul>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
All other protocols over IPv4 are supported using iptables, those over
IPv6 are implemented using ip6tables.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
On a Linux host, all traffic filtering instantiated by libvirt's network
filter subsystem first passes through the filtering support implemented
by ebtables and only then through iptables or ip6tables filters. If
a filter tree has rules with the protocols <code>mac</code>,
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<code>stp</code>, <code>vlan</code>
<code>arp</code>, <code>rarp</code>, <code>ipv4</code>,
or <code>ipv6</code> ebtables rules will automatically be instantiated.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
The role of the <code>chain</code> attribute in the network filter
XML is that internally a new user-defined ebtables table is created
that then for example receives all <code>arp</code> traffic coming
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
from or going to a virtual machine if the chain <code>arp</code>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
has been specified. Further, a rule is generated in an interface's
<code>root</code> chain that directs all ipv4 traffic into the
user-defined chain. Therefore, all ARP traffic rules should then be
placed into filters specifying this chain. This type of branching
into user-defined tables is only supported with filtering on the ebtables
layer.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<br/>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
2011-11-19 00:58:18 +08:00
<span class="since">Since 0.9.8</span> multiple chains for the same
protocol can be created. For this the name of the chain must have
a prefix of one of the previously enumerated protocols. To create an
additional chain for handling of ARP traffic, a chain with name
<code>arp-test</code> can be specified.
<br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
As an example, it is
possible to filter on UDP traffic by source and destination ports using
the <code>ip</code> protocol filter and specifying attributes for the
protocol, source and destination IP addresses and ports of UDP packets
that are to be accepted. This allows
early filtering of UDP traffic with ebtables. However, once an IP or IPv6
packet, such as a UDP packet,
has passed the ebtables layer and there is at least one rule in a filter
tree that instantiates iptables or ip6tables rules, a rule to let
the UDP packet pass will also be necessary to be provided for those
filtering layers. This can be
Fix some typos in messages, docs and comments.
2012-08-23 02:29:18 +08:00
achieved with a rule containing an appropriate <code>udp</code> or
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<code>udp-ipv6</code> traffic filtering node.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwfwriteexample">Example custom filter</a></h3>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
<p>
As an example we want to now build a filter that fulfills the following
list of requirements:
</p>
<ul>
<li>prevents a VM's interface from MAC, IP and ARP spoofing</li>
<li>opens only TCP ports 22 and 80 of a VM's interface</li>
<li>allows the VM to send ping traffic from an interface
nwfilter: Add 2nd example to the html docs This patch adds another example to the nwfilter html page and provides 2 solutions for how to write a filter meeting the given requirements using newly added features.
2010-10-07 18:50:26 +08:00
but not let the VM be pinged on the interface</li>
<li>allows the VM to do DNS lookups (UDP towards port 53)</li>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
2010-05-25 19:09:31 +08:00
</ul>
<p>
The requirement to prevent spoofing is fulfilled by the existing
<code>clean-traffic</code> network filter, thus we will reference this
filter from our custom filter.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
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<br/>
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To enable traffic for TCP ports 22 and 80 we will add 2 rules to
enable this type of traffic. To allow the VM to send ping traffic
we will add a rule for ICMP traffic. For simplicity reasons
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we allow general ICMP traffic to be initiated from the VM, not
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
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just ICMP echo request and response messages. To then
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disallow all other traffic to reach or be initiated by the
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
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VM we will then need to add a rule that drops all other traffic.
Assuming our VM is called <i>test</i> and
the interface we want to associate our filter with is called <i>eth0</i>,
we name our filter <i>test-eth0</i>.
The result of these considerations is the following network filter XML:
</p>
<pre>
&lt;filter name='test-eth0'&gt;
&lt;!-- reference the clean traffic filter to prevent
MAC, IP and ARP spoofing. By not providing
and IP address parameter, libvirt will detect the
IP address the VM is using. --&gt;
&lt;filterref filter='clean-traffic'/&gt;
&lt;!-- enable TCP ports 22 (ssh) and 80 (http) to be reachable --&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;tcp dstportstart='22'/&gt;
&lt;/rule&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;tcp dstportstart='80'/&gt;
&lt;/rule&gt;
&lt;!-- enable general ICMP traffic to be initiated by the VM;
this includes ping traffic --&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;icmp/&gt;
&lt;/rule&gt;
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&lt;!-- enable outgoing DNS lookups using UDP --&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;udp dstportstart='53'/&gt;
&lt;/rule&gt;
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&lt;!-- drop all other traffic --&gt;
&lt;rule action='drop' direction='inout'&gt;
&lt;all/&gt;
&lt;/rule&gt;
&lt;/filter&gt;
</pre>
<p>
Note that none of the rules in the above XML contain the
IP address of the VM as either source or destination address, yet
the filtering of the traffic works correctly. The reason is that
the evaluation of the rules internally happens on a
per-interface basis and the rules are evaluated based on the knowledge
about which (tap) interface has sent or will receive the packet rather
than what their source or destination IP address may be.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
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<br/><br/>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
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An XML fragment for a possible network interface description inside
the domain XML of the <code>test</code> VM could then look like this:
</p>
<pre>
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[...]
&lt;interface type='bridge'&gt;
&lt;source bridge='mybridge'/&gt;
&lt;filterref filter='test-eth0'/&gt;
&lt;/interface&gt;
[...]
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</pre>
<p>
To more strictly control the ICMP traffic and enforce that only
ICMP echo requests can be sent from the VM
and only ICMP echo responses be received by the VM, the above
<code>ICMP</code> rule can be replaced with the following two rules:
</p>
<pre>
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&lt;!-- enable outgoing ICMP echo requests--&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;icmp type='8'/&gt;
&lt;/rule&gt;
&lt;!-- enable incoming ICMP echo replies--&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;icmp type='0'/&gt;
&lt;/rule&gt;
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</pre>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
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<h3><a id="nwfwriteexample2nd">Second example custom filter</a></h3>
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<p>
In this example we now want to build a similar filter as in the
example above, but extend the list of requirements with an
ftp server located inside the VM. Further, we will be using features
that have been added in <span class="since">version 0.8.5</span>.
The requirements for this filter are:
</p>
<ul>
<li>prevents a VM's interface from MAC, IP and ARP spoofing</li>
<li>opens only TCP ports 22 and 80 of a VM's interface</li>
<li>allows the VM to send ping traffic from an interface
but not let the VM be pinged on the interface</li>
<li>allows the VM to do DNS lookups (UDP towards port 53)</li>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
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<li>enable an ftp server (in active mode) to be run inside the VM</li>
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</ul>
<p>
The additional requirement of allowing an ftp server to be run inside
the VM maps into the requirement of allowing port 21 to be reachable
for ftp control traffic as well as enabling the VM to establish an
outgoing tcp connection originating from the VM's TCP port 20 back to
the ftp client (ftp active mode). There are several ways of how this
filter can be written and we present 2 solutions.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
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<br/><br/>
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The 1st solution makes use of the <code>state</code> attribute of
the TCP protocol that gives us a hook into the connection tracking
framework of the Linux host. For the VM-initiated ftp data connection
(ftp active mode) we use the <code>RELATED</code> state that allows
us to detect that the VM-initiated ftp data connection is a consequence of
( or 'has a relationship with' ) an existing ftp control connection,
thus we want to allow it to let packets
pass the firewall. The <code>RELATED</code> state, however, is only
valid for the very first packet of the outgoing TCP connection for the
ftp data path. Afterwards, the state to compare against is
<code>ESTABLISHED</code>, which then applies equally
to the incoming and outgoing direction. All this is related to the ftp
data traffic originating from TCP port 20 of the VM. This then leads to
the following solution
doc: fix writing of QEMU QEMU should be written all upper or all lower case.
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<span class="since">(since 0.8.5 (QEMU, KVM, UML))</span>:
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</p>
<pre>
&lt;filter name='test-eth0'&gt;
&lt;!-- reference the clean traffic filter to prevent
MAC, IP and ARP spoofing. By not providing
and IP address parameter, libvirt will detect the
IP address the VM is using. --&gt;
&lt;filterref filter='clean-traffic'/&gt;
&lt;!-- enable TCP port 21 (ftp-control) to be reachable --&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;tcp dstportstart='21'/&gt;
&lt;/rule&gt;
&lt;!-- enable TCP port 20 for VM-initiated ftp data connection
related to an existing ftp control connection --&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;tcp srcportstart='20' state='RELATED,ESTABLISHED'/&gt;
&lt;/rule&gt;
&lt;!-- accept all packets from client on the ftp data connection --&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;tcp dstportstart='20' state='ESTABLISHED'/&gt;
&lt;/rule&gt;
&lt;!-- enable TCP ports 22 (ssh) and 80 (http) to be reachable --&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;tcp dstportstart='22'/&gt;
&lt;/rule&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;tcp dstportstart='80'/&gt;
&lt;/rule&gt;
&lt;!-- enable general ICMP traffic to be initiated by the VM;
this includes ping traffic --&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;icmp/&gt;
&lt;/rule&gt;
&lt;!-- enable outgoing DNS lookups using UDP --&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;udp dstportstart='53'/&gt;
&lt;/rule&gt;
&lt;!-- drop all other traffic --&gt;
&lt;rule action='drop' direction='inout'&gt;
&lt;all/&gt;
&lt;/rule&gt;
&lt;/filter&gt;
</pre>
<p>
Before trying out a filter using the <code>RELATED</code> state,
Fix some typos in messages, docs and comments.
2012-08-23 02:29:18 +08:00
you have to make sure that the appropriate connection tracking module
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has been loaded into the host's kernel. Depending on the version of the
kernel, you must run either one of the following two commands before
the ftp connection with the VM is established.
</p>
<pre>
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modprobe nf_conntrack_ftp # where available or
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formatnwfilter.html.in: Kill useless spaces in <pre/> The <pre/> section is rendered as-is on the page. That is, if all the lines are prefixed with 4 spaces the rendered page will also have them. Problem is if we put a box around such <pre/> because the content might not fix into it. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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modprobe ip_conntrack_ftp # if above is not available
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</pre>
<p>
If other protocols than ftp are to be used in conjunction with the
<code>RELATED</code> state, their corresponding module must be loaded.
Modules exist at least for the protocols ftp, tftp, irc, sip,
sctp, and amanda.
</p>
<p>
The 2nd solution makes uses the state flags of connections more
than the previous solution did.
In this solution we take advantage of the fact that the
<code>NEW</code> state of a connection is valid when the very
first packet of a traffic flow is seen. Subsequently, if the very first
packet of a flow is accepted, the flow becomes a connection and enters
the <code>ESTABLISHED</code> state. This allows us to write a general
rule for allowing packets of <code>ESTABLISHED</code> connections to
reach the VM or be sent by the VM.
We write specific rules for the very first packets identified by the
<code>NEW</code> state and for which ports they are acceptable. All
packets for ports that are not explicitly accepted will be dropped and
therefore the connection will not go into the <code>ESTABLISHED</code>
state and any subsequent packets be dropped.
</p>
<pre>
&lt;filter name='test-eth0'&gt;
&lt;!-- reference the clean traffic filter to prevent
MAC, IP and ARP spoofing. By not providing
and IP address parameter, libvirt will detect the
IP address the VM is using. --&gt;
&lt;filterref filter='clean-traffic'/&gt;
&lt;!-- let the packets of all previously accepted connections reach the VM --&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;all state='ESTABLISHED'/&gt;
&lt;/rule&gt;
&lt;!-- let the packets of all previously accepted and related connections be sent from the VM --&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;all state='ESTABLISHED,RELATED'/&gt;
&lt;/rule&gt;
&lt;!-- enable traffic towards port 21 (ftp), 22 (ssh) and 80 (http) --&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;tcp dstportstart='21' dstportend='22' state='NEW'/&gt;
&lt;/rule&gt;
&lt;rule action='accept' direction='in'&gt;
&lt;tcp dstportstart='80' state='NEW'/&gt;
&lt;/rule&gt;
&lt;!-- enable general ICMP traffic to be initiated by the VM;
this includes ping traffic --&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;icmp state='NEW'/&gt;
&lt;/rule&gt;
&lt;!-- enable outgoing DNS lookups using UDP --&gt;
&lt;rule action='accept' direction='out'&gt;
&lt;udp dstportstart='53' state='NEW'/&gt;
&lt;/rule&gt;
&lt;!-- drop all other traffic --&gt;
&lt;rule action='drop' direction='inout'&gt;
&lt;all/&gt;
&lt;/rule&gt;
&lt;/filter&gt;
</pre>
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docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
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<h2><a id="nwflimits">Limitations</a></h2>
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<p>
The following sections list (current) limitations of the network
filtering subsystem.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
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<h3><a id="nwflimitsmigr">VM Migration</a></h3>
nwfilter: documentation This patch adds documentation of the nwfilter subsystem of libvirt to the existing (web) docs.
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<p>
VM migration is only supported if the whole filter tree
that is referenced by a virtual machine's top level filter
is also available on the target host. The network filter
<i>clean-traffic</i>
for example should be available on all libvirt installations
of version 0.8.1 or later and thus enable migration of VMs that
for example reference this filter. All other
custom filters must be migrated using higher layer software. It is
outside the scope of libvirt to ensure that referenced filters
on the source system are equivalent to those on the target system
and vice versa.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
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<br/><br/>
docs: fix a typo in formatnwfilter.html.in s/insallations/installations/ Signed-off-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
2013-11-15 17:33:28 +08:00
Migration must occur between libvirt installations of version
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0.8.1 or later in order not to lose the network traffic filters
associated with an interface.
</p>
docs: switch to using 'id' attribute instead of 'name' for links The 'name' attribute on <a...> elements is deprecated in favour of the 'id' attribute which is allowed on any element. HTML5 drops 'name' support entirely. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-26 22:52:42 +08:00
<h3><a id="nwflimitsvlan">VLAN filtering on Linux</a></h3>
Documentation about chains' priorities, lists of elements etc. This patch adds several aspects of documentation about the network filtering system: - chains, chains' priorities and chains' default priorities - talks about lists of elements, i.e., a variable assigned multiple values (part of already ACK-ed series) - already mentions the vlan, stp and mac chains added later on (https://www.redhat.com/archives/libvir-list/2011-October/msg01238.html) - mentions limitations of vlan filtering (when sent by VM) on Linux systems
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<p>
VLAN (802.1Q) packets, if sent by a virtual machine, cannot be filtered
with rules for protocol IDs <code>arp</code>, <code>rarp</code>,
<code>ipv4</code> and <code>ipv6</code> but only
with protocol IDs <code>mac</code> and <code>vlan</code>. Therefore,
the example filter <code>clean-traffic</code> will not work as expected.
</p>
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</body>
</html>