378 lines
12 KiB
Plaintext
378 lines
12 KiB
Plaintext
#
|
|
# Network configuration
|
|
#
|
|
|
|
menuconfig NET
|
|
bool "Networking support"
|
|
select NLATTR
|
|
select GENERIC_NET_UTILS
|
|
---help---
|
|
Unless you really know what you are doing, you should say Y here.
|
|
The reason is that some programs need kernel networking support even
|
|
when running on a stand-alone machine that isn't connected to any
|
|
other computer.
|
|
|
|
If you are upgrading from an older kernel, you
|
|
should consider updating your networking tools too because changes
|
|
in the kernel and the tools often go hand in hand. The tools are
|
|
contained in the package net-tools, the location and version number
|
|
of which are given in <file:Documentation/Changes>.
|
|
|
|
For a general introduction to Linux networking, it is highly
|
|
recommended to read the NET-HOWTO, available from
|
|
<http://www.tldp.org/docs.html#howto>.
|
|
|
|
if NET
|
|
|
|
config WANT_COMPAT_NETLINK_MESSAGES
|
|
bool
|
|
help
|
|
This option can be selected by other options that need compat
|
|
netlink messages.
|
|
|
|
config COMPAT_NETLINK_MESSAGES
|
|
def_bool y
|
|
depends on COMPAT
|
|
depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
|
|
help
|
|
This option makes it possible to send different netlink messages
|
|
to tasks depending on whether the task is a compat task or not. To
|
|
achieve this, you need to set skb_shinfo(skb)->frag_list to the
|
|
compat skb before sending the skb, the netlink code will sort out
|
|
which message to actually pass to the task.
|
|
|
|
Newly written code should NEVER need this option but do
|
|
compat-independent messages instead!
|
|
|
|
menu "Networking options"
|
|
|
|
source "net/packet/Kconfig"
|
|
source "net/unix/Kconfig"
|
|
source "net/xfrm/Kconfig"
|
|
source "net/iucv/Kconfig"
|
|
|
|
config INET
|
|
bool "TCP/IP networking"
|
|
select CRYPTO
|
|
select CRYPTO_AES
|
|
---help---
|
|
These are the protocols used on the Internet and on most local
|
|
Ethernets. It is highly recommended to say Y here (this will enlarge
|
|
your kernel by about 400 KB), since some programs (e.g. the X window
|
|
system) use TCP/IP even if your machine is not connected to any
|
|
other computer. You will get the so-called loopback device which
|
|
allows you to ping yourself (great fun, that!).
|
|
|
|
For an excellent introduction to Linux networking, please read the
|
|
Linux Networking HOWTO, available from
|
|
<http://www.tldp.org/docs.html#howto>.
|
|
|
|
If you say Y here and also to "/proc file system support" and
|
|
"Sysctl support" below, you can change various aspects of the
|
|
behavior of the TCP/IP code by writing to the (virtual) files in
|
|
/proc/sys/net/ipv4/*; the options are explained in the file
|
|
<file:Documentation/networking/ip-sysctl.txt>.
|
|
|
|
Short answer: say Y.
|
|
|
|
if INET
|
|
source "net/ipv4/Kconfig"
|
|
source "net/ipv6/Kconfig"
|
|
source "net/netlabel/Kconfig"
|
|
|
|
endif # if INET
|
|
|
|
config NETWORK_SECMARK
|
|
bool "Security Marking"
|
|
help
|
|
This enables security marking of network packets, similar
|
|
to nfmark, but designated for security purposes.
|
|
If you are unsure how to answer this question, answer N.
|
|
|
|
config NET_PTP_CLASSIFY
|
|
def_bool n
|
|
|
|
config NETWORK_PHY_TIMESTAMPING
|
|
bool "Timestamping in PHY devices"
|
|
select NET_PTP_CLASSIFY
|
|
help
|
|
This allows timestamping of network packets by PHYs with
|
|
hardware timestamping capabilities. This option adds some
|
|
overhead in the transmit and receive paths.
|
|
|
|
If you are unsure how to answer this question, answer N.
|
|
|
|
menuconfig NETFILTER
|
|
bool "Network packet filtering framework (Netfilter)"
|
|
---help---
|
|
Netfilter is a framework for filtering and mangling network packets
|
|
that pass through your Linux box.
|
|
|
|
The most common use of packet filtering is to run your Linux box as
|
|
a firewall protecting a local network from the Internet. The type of
|
|
firewall provided by this kernel support is called a "packet
|
|
filter", which means that it can reject individual network packets
|
|
based on type, source, destination etc. The other kind of firewall,
|
|
a "proxy-based" one, is more secure but more intrusive and more
|
|
bothersome to set up; it inspects the network traffic much more
|
|
closely, modifies it and has knowledge about the higher level
|
|
protocols, which a packet filter lacks. Moreover, proxy-based
|
|
firewalls often require changes to the programs running on the local
|
|
clients. Proxy-based firewalls don't need support by the kernel, but
|
|
they are often combined with a packet filter, which only works if
|
|
you say Y here.
|
|
|
|
You should also say Y here if you intend to use your Linux box as
|
|
the gateway to the Internet for a local network of machines without
|
|
globally valid IP addresses. This is called "masquerading": if one
|
|
of the computers on your local network wants to send something to
|
|
the outside, your box can "masquerade" as that computer, i.e. it
|
|
forwards the traffic to the intended outside destination, but
|
|
modifies the packets to make it look like they came from the
|
|
firewall box itself. It works both ways: if the outside host
|
|
replies, the Linux box will silently forward the traffic to the
|
|
correct local computer. This way, the computers on your local net
|
|
are completely invisible to the outside world, even though they can
|
|
reach the outside and can receive replies. It is even possible to
|
|
run globally visible servers from within a masqueraded local network
|
|
using a mechanism called portforwarding. Masquerading is also often
|
|
called NAT (Network Address Translation).
|
|
|
|
Another use of Netfilter is in transparent proxying: if a machine on
|
|
the local network tries to connect to an outside host, your Linux
|
|
box can transparently forward the traffic to a local server,
|
|
typically a caching proxy server.
|
|
|
|
Yet another use of Netfilter is building a bridging firewall. Using
|
|
a bridge with Network packet filtering enabled makes iptables "see"
|
|
the bridged traffic. For filtering on the lower network and Ethernet
|
|
protocols over the bridge, use ebtables (under bridge netfilter
|
|
configuration).
|
|
|
|
Various modules exist for netfilter which replace the previous
|
|
masquerading (ipmasqadm), packet filtering (ipchains), transparent
|
|
proxying, and portforwarding mechanisms. Please see
|
|
<file:Documentation/Changes> under "iptables" for the location of
|
|
these packages.
|
|
|
|
if NETFILTER
|
|
|
|
config NETFILTER_DEBUG
|
|
bool "Network packet filtering debugging"
|
|
depends on NETFILTER
|
|
help
|
|
You can say Y here if you want to get additional messages useful in
|
|
debugging the netfilter code.
|
|
|
|
config NETFILTER_ADVANCED
|
|
bool "Advanced netfilter configuration"
|
|
depends on NETFILTER
|
|
default y
|
|
help
|
|
If you say Y here you can select between all the netfilter modules.
|
|
If you say N the more unusual ones will not be shown and the
|
|
basic ones needed by most people will default to 'M'.
|
|
|
|
If unsure, say Y.
|
|
|
|
config BRIDGE_NETFILTER
|
|
tristate "Bridged IP/ARP packets filtering"
|
|
depends on (BRIDGE || BRIDGE=n)
|
|
depends on NETFILTER && INET
|
|
depends on NETFILTER_ADVANCED
|
|
default m
|
|
---help---
|
|
Enabling this option will let arptables resp. iptables see bridged
|
|
ARP resp. IP traffic. If you want a bridging firewall, you probably
|
|
want this option enabled.
|
|
Enabling or disabling this option doesn't enable or disable
|
|
ebtables.
|
|
|
|
If unsure, say N.
|
|
|
|
source "net/netfilter/Kconfig"
|
|
source "net/ipv4/netfilter/Kconfig"
|
|
source "net/ipv6/netfilter/Kconfig"
|
|
source "net/decnet/netfilter/Kconfig"
|
|
source "net/bridge/netfilter/Kconfig"
|
|
|
|
endif
|
|
|
|
source "net/dccp/Kconfig"
|
|
source "net/sctp/Kconfig"
|
|
source "net/rds/Kconfig"
|
|
source "net/tipc/Kconfig"
|
|
source "net/atm/Kconfig"
|
|
source "net/l2tp/Kconfig"
|
|
source "net/802/Kconfig"
|
|
source "net/bridge/Kconfig"
|
|
source "net/dsa/Kconfig"
|
|
source "net/8021q/Kconfig"
|
|
source "net/decnet/Kconfig"
|
|
source "net/llc/Kconfig"
|
|
source "net/ipx/Kconfig"
|
|
source "drivers/net/appletalk/Kconfig"
|
|
source "net/x25/Kconfig"
|
|
source "net/lapb/Kconfig"
|
|
source "net/phonet/Kconfig"
|
|
source "net/6lowpan/Kconfig"
|
|
source "net/ieee802154/Kconfig"
|
|
source "net/mac802154/Kconfig"
|
|
source "net/sched/Kconfig"
|
|
source "net/dcb/Kconfig"
|
|
source "net/dns_resolver/Kconfig"
|
|
source "net/batman-adv/Kconfig"
|
|
source "net/openvswitch/Kconfig"
|
|
source "net/vmw_vsock/Kconfig"
|
|
source "net/netlink/Kconfig"
|
|
source "net/mpls/Kconfig"
|
|
source "net/hsr/Kconfig"
|
|
|
|
config RPS
|
|
boolean
|
|
depends on SMP && SYSFS
|
|
default y
|
|
|
|
config RFS_ACCEL
|
|
boolean
|
|
depends on RPS
|
|
select CPU_RMAP
|
|
default y
|
|
|
|
config XPS
|
|
boolean
|
|
depends on SMP
|
|
default y
|
|
|
|
config CGROUP_NET_PRIO
|
|
bool "Network priority cgroup"
|
|
depends on CGROUPS
|
|
---help---
|
|
Cgroup subsystem for use in assigning processes to network priorities on
|
|
a per-interface basis.
|
|
|
|
config CGROUP_NET_CLASSID
|
|
boolean "Network classid cgroup"
|
|
depends on CGROUPS
|
|
---help---
|
|
Cgroup subsystem for use as general purpose socket classid marker that is
|
|
being used in cls_cgroup and for netfilter matching.
|
|
|
|
config NET_RX_BUSY_POLL
|
|
boolean
|
|
default y
|
|
|
|
config BQL
|
|
boolean
|
|
depends on SYSFS
|
|
select DQL
|
|
default y
|
|
|
|
config BPF_JIT
|
|
bool "enable BPF Just In Time compiler"
|
|
depends on HAVE_BPF_JIT
|
|
depends on MODULES
|
|
---help---
|
|
Berkeley Packet Filter filtering capabilities are normally handled
|
|
by an interpreter. This option allows kernel to generate a native
|
|
code when filter is loaded in memory. This should speedup
|
|
packet sniffing (libpcap/tcpdump). Note : Admin should enable
|
|
this feature changing /proc/sys/net/core/bpf_jit_enable
|
|
|
|
config NET_FLOW_LIMIT
|
|
boolean
|
|
depends on RPS
|
|
default y
|
|
---help---
|
|
The network stack has to drop packets when a receive processing CPU's
|
|
backlog reaches netdev_max_backlog. If a few out of many active flows
|
|
generate the vast majority of load, drop their traffic earlier to
|
|
maintain capacity for the other flows. This feature provides servers
|
|
with many clients some protection against DoS by a single (spoofed)
|
|
flow that greatly exceeds average workload.
|
|
|
|
menu "Network testing"
|
|
|
|
config NET_PKTGEN
|
|
tristate "Packet Generator (USE WITH CAUTION)"
|
|
depends on INET && PROC_FS
|
|
---help---
|
|
This module will inject preconfigured packets, at a configurable
|
|
rate, out of a given interface. It is used for network interface
|
|
stress testing and performance analysis. If you don't understand
|
|
what was just said, you don't need it: say N.
|
|
|
|
Documentation on how to use the packet generator can be found
|
|
at <file:Documentation/networking/pktgen.txt>.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called pktgen.
|
|
|
|
config NET_TCPPROBE
|
|
tristate "TCP connection probing"
|
|
depends on INET && PROC_FS && KPROBES
|
|
---help---
|
|
This module allows for capturing the changes to TCP connection
|
|
state in response to incoming packets. It is used for debugging
|
|
TCP congestion avoidance modules. If you don't understand
|
|
what was just said, you don't need it: say N.
|
|
|
|
Documentation on how to use TCP connection probing can be found
|
|
at:
|
|
|
|
http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called tcp_probe.
|
|
|
|
config NET_DROP_MONITOR
|
|
tristate "Network packet drop alerting service"
|
|
depends on INET && TRACEPOINTS
|
|
---help---
|
|
This feature provides an alerting service to userspace in the
|
|
event that packets are discarded in the network stack. Alerts
|
|
are broadcast via netlink socket to any listening user space
|
|
process. If you don't need network drop alerts, or if you are ok
|
|
just checking the various proc files and other utilities for
|
|
drop statistics, say N here.
|
|
|
|
endmenu
|
|
|
|
endmenu
|
|
|
|
source "net/ax25/Kconfig"
|
|
source "net/can/Kconfig"
|
|
source "net/irda/Kconfig"
|
|
source "net/bluetooth/Kconfig"
|
|
source "net/rxrpc/Kconfig"
|
|
|
|
config FIB_RULES
|
|
bool
|
|
|
|
menuconfig WIRELESS
|
|
bool "Wireless"
|
|
depends on !S390
|
|
default y
|
|
|
|
if WIRELESS
|
|
|
|
source "net/wireless/Kconfig"
|
|
source "net/mac80211/Kconfig"
|
|
|
|
endif # WIRELESS
|
|
|
|
source "net/wimax/Kconfig"
|
|
|
|
source "net/rfkill/Kconfig"
|
|
source "net/9p/Kconfig"
|
|
source "net/caif/Kconfig"
|
|
source "net/ceph/Kconfig"
|
|
source "net/nfc/Kconfig"
|
|
|
|
|
|
endif # if NET
|
|
|
|
# Used by archs to tell that they support BPF_JIT
|
|
config HAVE_BPF_JIT
|
|
bool
|