path: root/net/netfilter/Kconfig

menu "Core Netfilter Configuration"
	depends on NET && INET && NETFILTER

config NETFILTER_NETLINK
	tristate

config NETFILTER_NETLINK_QUEUE
	tristate "Netfilter NFQUEUE over NFNETLINK interface"
	depends on NETFILTER_ADVANCED
	select NETFILTER_NETLINK
	help
	  If this option is enabled, the kernel will include support
	  for queueing packets via NFNETLINK.
	  
config NETFILTER_NETLINK_LOG
	tristate "Netfilter LOG over NFNETLINK interface"
	default m if NETFILTER_ADVANCED=n
	select NETFILTER_NETLINK
	help
	  If this option is enabled, the kernel will include support
	  for logging packets via NFNETLINK.

	  This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
	  and is also scheduled to replace the old syslog-based ipt_LOG
	  and ip6t_LOG modules.

config NF_CONNTRACK
	tristate "Netfilter connection tracking support"
	default m if NETFILTER_ADVANCED=n
	help
	  Connection tracking keeps a record of what packets have passed
	  through your machine, in order to figure out how they are related
	  into connections.

	  This is required to do Masquerading or other kinds of Network
	  Address Translation.  It can also be used to enhance packet
	  filtering (see `Connection state match support' below).

	  To compile it as a module, choose M here.  If unsure, say N.

if NF_CONNTRACK

config NF_CT_ACCT
	bool "Connection tracking flow accounting"
	depends on NETFILTER_ADVANCED
	help
	  If this option is enabled, the connection tracking code will
	  keep per-flow packet and byte counters.

	  Those counters can be used for flow-based accounting or the
	  `connbytes' match.

	  Please note that currently this option only sets a default state.
	  You may change it at boot time with nf_conntrack.acct=0/1 kernel
	  parameter or by loading the nf_conntrack module with acct=0/1.

	  You may also disable/enable it on a running system with:
	   sysctl net.netfilter.nf_conntrack_acct=0/1

	  This option will be removed in 2.6.29.

	  If unsure, say `N'.

config NF_CONNTRACK_MARK
	bool  'Connection mark tracking support'
	depends on NETFILTER_ADVANCED
	help
	  This option enables support for connection marks, used by the
	  `CONNMARK' target and `connmark' match. Similar to the mark value
	  of packets, but this mark value is kept in the conntrack session
	  instead of the individual packets.

config NF_CONNTRACK_SECMARK
	bool  'Connection tracking security mark support'
	depends on NETWORK_SECMARK
	default m if NETFILTER_ADVANCED=n
	help
	  This option enables security markings to be applied to
	  connections.  Typically they are copied to connections from
	  packets using the CONNSECMARK target and copied back from
	  connections to packets with the same target, with the packets
	  being originally labeled via SECMARK.

	  If unsure, say 'N'.

config NF_CONNTRACK_ZONES
	bool  'Connection tracking zones'
	depends on NETFILTER_ADVANCED
	depends on NETFILTER_XT_TARGET_CT
	help
	  This option enables support for connection tracking zones.
	  Normally, each connection needs to have a unique system wide
	  identity. Connection tracking zones allow to have multiple
	  connections using the same identity, as long as they are
	  contained in different zones.

	  If unsure, say `N'.

config NF_CONNTRACK_EVENTS
	bool "Connection tracking events"
	depends on NETFILTER_ADVANCED
	help
	  If this option is enabled, the connection tracking code will
	  provide a notifier chain that can be used by other kernel code
	  to get notified about changes in the connection tracking state.

	  If unsure, say `N'.

config NF_CT_PROTO_DCCP
	tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)'
	depends on EXPERIMENTAL
	depends on NETFILTER_ADVANCED
	default IP_DCCP
	help
	  With this option enabled, the layer 3 independent connection
	  tracking code will be able to do state tracking on DCCP connections.

	  If unsure, say 'N'.

config NF_CT_PROTO_GRE
	tristate

config NF_CT_PROTO_SCTP
	tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
	depends on EXPERIMENTAL
	depends on NETFILTER_ADVANCED
	default IP_SCTP
	help
	  With this option enabled, the layer 3 independent connection
	  tracking code will be able to do state tracking on SCTP connections.

	  If you want to compile it as a module, say M here and read
	  <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.

config NF_CT_PROTO_UDPLITE
	tristate 'UDP-Lite protocol connection tracking support'
	depends on NETFILTER_ADVANCED
	help
	  With this option enabled, the layer 3 independent connection
	  tracking code will be able to do state tracking on UDP-Lite
	  connections.

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_AMANDA
	tristate "Amanda backup protocol support"
	depends on NETFILTER_ADVANCED
	select TEXTSEARCH
	select TEXTSEARCH_KMP
	help
	  If you are running the Amanda backup package <http://www.amanda.org/>
	  on this machine or machines that will be MASQUERADED through this
	  machine, then you may want to enable this feature.  This allows the
	  connection tracking and natting code to allow the sub-channels that
	  Amanda requires for communication of the backup data, messages and
	  index.

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_FTP
	tristate "FTP protocol support"
	default m if NETFILTER_ADVANCED=n
	help
	  Tracking FTP connections is problematic: special helpers are
	  required for tracking them, and doing masquerading and other forms
	  of Network Address Translation on them.

	  This is FTP support on Layer 3 independent connection tracking.
	  Layer 3 independent connection tracking is experimental scheme
	  which generalize ip_conntrack to support other layer 3 protocols.

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_H323
	tristate "H.323 protocol support"
	depends on (IPV6 || IPV6=n)
	depends on NETFILTER_ADVANCED
	help
	  H.323 is a VoIP signalling protocol from ITU-T. As one of the most
	  important VoIP protocols, it is widely used by voice hardware and
	  software including voice gateways, IP phones, Netmeeting, OpenPhone,
	  Gnomemeeting, etc.

	  With this module you can support H.323 on a connection tracking/NAT
	  firewall.

	  This module supports RAS, Fast Start, H.245 Tunnelling, Call
	  Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
	  whiteboard, file transfer, etc. For more information, please
	  visit http://nath323.sourceforge.net/.

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_IRC
	tristate "IRC protocol support"
	default m if NETFILTER_ADVANCED=n
	help
	  There is a commonly-used extension to IRC called
	  Direct Client-to-Client Protocol (DCC).  This enables users to send
	  files to each other, and also chat to each other without the need
	  of a server.  DCC Sending is used anywhere you send files over IRC,
	  and DCC Chat is most commonly used by Eggdrop bots.  If you are
	  using NAT, this extension will enable you to send files and initiate
	  chats.  Note that you do NOT need this extension to get files or
	  have others initiate chats, or everything else in IRC.

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_NETBIOS_NS
	tristate "NetBIOS name service protocol support"
	depends on NETFILTER_ADVANCED
	help
	  NetBIOS name service requests are sent as broadcast messages from an
	  unprivileged port and responded to with unicast messages to the
	  same port. This make them hard to firewall properly because connection
	  tracking doesn't deal with broadcasts. This helper tracks locally
	  originating NetBIOS name service requests and the corresponding
	  responses. It relies on correct IP address configuration, specifically
	  netmask and broadcast address. When properly configured, the output
	  of "ip address show" should look similar to this:

	  $ ip -4 address show eth0
	  4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
	      inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_PPTP
	tristate "PPtP protocol support"
	depends on NETFILTER_ADVANCED
	select NF_CT_PROTO_GRE
	help
	  This module adds support for PPTP (Point to Point Tunnelling
	  Protocol, RFC2637) connection tracking and NAT.

	  If you are running PPTP sessions over a stateful firewall or NAT
	  box, you may want to enable this feature.

	  Please note that not all PPTP modes of operation are supported yet.
	  Specifically these limitations exist:
	    - Blindly assumes that control connections are always established
	      in PNS->PAC direction. This is a violation of RFC2637.
	    - Only supports a single call within each session

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_SANE
	tristate "SANE protocol support (EXPERIMENTAL)"
	depends on EXPERIMENTAL
	depends on NETFILTER_ADVANCED
	help
	  SANE is a protocol for remote access to scanners as implemented
	  by the 'saned' daemon. Like FTP, it uses separate control and
	  data connections.

	  With this module you can support SANE on a connection tracking
	  firewall.

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_SIP
	tristate "SIP protocol support"
	default m if NETFILTER_ADVANCED=n
	help
	  SIP is an application-layer control protocol that can establish,
	  modify, and terminate multimedia sessions (conferences) such as
	  Internet telephony calls. With the ip_conntrack_sip and
	  the nf_nat_sip modules you can support the protocol on a connection
	  tracking/NATing firewall.

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CONNTRACK_TFTP
	tristate "TFTP protocol support"
	depends on NETFILTER_ADVANCED
	help
	  TFTP connection tracking helper, this is required depending
	  on how restrictive your ruleset is.
	  If you are using a tftp client behind -j SNAT or -j MASQUERADING
	  you will need this.

	  To compile it as a module, choose M here.  If unsure, say N.

config NF_CT_NETLINK
	tristate 'Connection tracking netlink interface'
	select NETFILTER_NETLINK
	default m if NETFILTER_ADVANCED=n
	help
	  This option enables support for a netlink-based userspace interface

endif # NF_CONNTRACK

# transparent proxy support
config NETFILTER_TPROXY
	tristate "Transparent proxying support (EXPERIMENTAL)"
	depends on EXPERIMENTAL
	depends on IP_NF_MANGLE
	depends on NETFILTER_ADVANCED
	help
	  This option enables transparent proxying support, that is,
	  support for handling non-locally bound IPv4 TCP and UDP sockets.
	  For it to work you will have to configure certain iptables rules
	  and use policy routing. For more information on how to set it up
	  see Documentation/networking/tproxy.txt.

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XTABLES
	tristate "Netfilter Xtables support (required for ip_tables)"
	default m if NETFILTER_ADVANCED=n
	help
	  This is required if you intend to use any of ip_tables,
	  ip6_tables or arp_tables.

if NETFILTER_XTABLES

comment "Xtables combined modules"

config NETFILTER_XT_MARK
	tristate 'nfmark target and match support'
	default m if NETFILTER_ADVANCED=n
	---help---
	This option adds the "MARK" target and "mark" match.

	Netfilter mark matching