243 lines
8.2 KiB
Plaintext
243 lines
8.2 KiB
Plaintext
#
|
|
# Network configuration
|
|
#
|
|
|
|
menu "Networking"
|
|
|
|
config NET
|
|
bool "Networking support"
|
|
---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>.
|
|
|
|
# Make sure that all config symbols are dependent on NET
|
|
if NET
|
|
|
|
menu "Networking options"
|
|
|
|
config NET_NS
|
|
bool "Network namespace support"
|
|
default n
|
|
depends on EXPERIMENTAL && !SYSFS
|
|
help
|
|
Allow user space to create what appear to be multiple instances
|
|
of the network stack.
|
|
|
|
source "net/packet/Kconfig"
|
|
source "net/unix/Kconfig"
|
|
source "net/xfrm/Kconfig"
|
|
source "net/iucv/Kconfig"
|
|
|
|
config INET
|
|
bool "TCP/IP networking"
|
|
---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 144 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.
|
|
|
|
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.
|
|
|
|
Make sure to say N to "Fast switching" below if you intend to say Y
|
|
here, as Fast switching currently bypasses netfilter.
|
|
|
|
Chances are that you should say Y here if you compile a kernel which
|
|
will run as a router and N for regular hosts. If unsure, say N.
|
|
|
|
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 BRIDGE_NETFILTER
|
|
bool "Bridged IP/ARP packets filtering"
|
|
depends on BRIDGE && NETFILTER && INET
|
|
default y
|
|
---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/tipc/Kconfig"
|
|
source "net/atm/Kconfig"
|
|
source "net/bridge/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/econet/Kconfig"
|
|
source "net/wanrouter/Kconfig"
|
|
source "net/sched/Kconfig"
|
|
|
|
menu "Network testing"
|
|
|
|
config NET_PKTGEN
|
|
tristate "Packet Generator (USE WITH CAUTION)"
|
|
depends on 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 && EXPERIMENTAL && 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://linux-net.osdl.org/index.php/TcpProbe
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called tcp_probe.
|
|
|
|
endmenu
|
|
|
|
endmenu
|
|
|
|
source "net/ax25/Kconfig"
|
|
source "net/irda/Kconfig"
|
|
source "net/bluetooth/Kconfig"
|
|
source "net/rxrpc/Kconfig"
|
|
|
|
config FIB_RULES
|
|
bool
|
|
|
|
menu "Wireless"
|
|
depends on !S390
|
|
|
|
source "net/wireless/Kconfig"
|
|
source "net/mac80211/Kconfig"
|
|
source "net/ieee80211/Kconfig"
|
|
|
|
endmenu
|
|
|
|
source "net/rfkill/Kconfig"
|
|
source "net/9p/Kconfig"
|
|
|
|
endif # if NET
|
|
endmenu # Networking
|
|
|