linux-imx/net/Kconfig

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 NETDEBUG bool "Network packet debugging" help You can say Y here if you want to get additional messages useful in debugging bad packets, but can overwhelm logs under denial of service attacks.

source "net/packet/Kconfig" source "net/unix/Kconfig" source "net/xfrm/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"

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 (replaces ipchains)" ---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"

config NET_DIVERT bool "Frame Diverter (EXPERIMENTAL)" depends on EXPERIMENTAL ---help--- The Frame Diverter allows you to divert packets from the network, that are not aimed at the interface receiving it (in promisc. mode). Typically, a Linux box setup as an Ethernet bridge with the Frames Diverter on, can do some really transparent www caching using a Squid proxy for example.

  This is very useful when you don't want to change your router's
  config (or if you simply don't have access to it).

  The other possible usages of diverting Ethernet Frames are
  numberous:
  - reroute smtp traffic to another interface
  - traffic-shape certain network streams
  - transparently proxy smtp connections
  - etc...

  For more informations, please refer to:
  <http://diverter.sourceforge.net/>
  <http://perso.wanadoo.fr/magpie/EtherDivert.html>

  If unsure, say N.

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 the packet generator 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/ieee80211/Kconfig"

config WIRELESS_EXT bool

endif # if NET endmenu # Networking