forked from Minki/linux
5097846230
This patch adds the infrastructure to add fine timeout tuning over nfnetlink. Now you can use the NFNL_SUBSYS_CTNETLINK_TIMEOUT subsystem to create/delete/dump timeout objects that contain some specific timeout policy for one flow. The follow up patches will allow you attach timeout policy object to conntrack via the CT target and the conntrack extension infrastructure. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
1144 lines
39 KiB
Plaintext
1144 lines
39 KiB
Plaintext
menu "Core Netfilter Configuration"
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depends on NET && INET && NETFILTER
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config NETFILTER_NETLINK
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tristate
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config NETFILTER_NETLINK_ACCT
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tristate "Netfilter NFACCT over NFNETLINK interface"
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depends on NETFILTER_ADVANCED
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select NETFILTER_NETLINK
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help
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If this option is enabled, the kernel will include support
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for extended accounting via NFNETLINK.
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config NETFILTER_NETLINK_QUEUE
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tristate "Netfilter NFQUEUE over NFNETLINK interface"
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depends on NETFILTER_ADVANCED
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select NETFILTER_NETLINK
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help
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If this option is enabled, the kernel will include support
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for queueing packets via NFNETLINK.
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config NETFILTER_NETLINK_LOG
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tristate "Netfilter LOG over NFNETLINK interface"
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default m if NETFILTER_ADVANCED=n
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select NETFILTER_NETLINK
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help
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If this option is enabled, the kernel will include support
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for logging packets via NFNETLINK.
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This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
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and is also scheduled to replace the old syslog-based ipt_LOG
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and ip6t_LOG modules.
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config NF_CONNTRACK
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tristate "Netfilter connection tracking support"
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default m if NETFILTER_ADVANCED=n
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help
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Connection tracking keeps a record of what packets have passed
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through your machine, in order to figure out how they are related
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into connections.
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This is required to do Masquerading or other kinds of Network
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Address Translation. It can also be used to enhance packet
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filtering (see `Connection state match support' below).
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To compile it as a module, choose M here. If unsure, say N.
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if NF_CONNTRACK
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config NF_CONNTRACK_MARK
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bool 'Connection mark tracking support'
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depends on NETFILTER_ADVANCED
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help
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This option enables support for connection marks, used by the
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`CONNMARK' target and `connmark' match. Similar to the mark value
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of packets, but this mark value is kept in the conntrack session
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instead of the individual packets.
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config NF_CONNTRACK_SECMARK
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bool 'Connection tracking security mark support'
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depends on NETWORK_SECMARK
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default m if NETFILTER_ADVANCED=n
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help
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This option enables security markings to be applied to
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connections. Typically they are copied to connections from
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packets using the CONNSECMARK target and copied back from
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connections to packets with the same target, with the packets
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being originally labeled via SECMARK.
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If unsure, say 'N'.
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config NF_CONNTRACK_ZONES
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bool 'Connection tracking zones'
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depends on NETFILTER_ADVANCED
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depends on NETFILTER_XT_TARGET_CT
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help
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This option enables support for connection tracking zones.
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Normally, each connection needs to have a unique system wide
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identity. Connection tracking zones allow to have multiple
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connections using the same identity, as long as they are
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contained in different zones.
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If unsure, say `N'.
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config NF_CONNTRACK_PROCFS
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bool "Supply CT list in procfs (OBSOLETE)"
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default y
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depends on PROC_FS
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---help---
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This option enables for the list of known conntrack entries
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to be shown in procfs under net/netfilter/nf_conntrack. This
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is considered obsolete in favor of using the conntrack(8)
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tool which uses Netlink.
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config NF_CONNTRACK_EVENTS
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bool "Connection tracking events"
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depends on NETFILTER_ADVANCED
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help
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If this option is enabled, the connection tracking code will
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provide a notifier chain that can be used by other kernel code
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to get notified about changes in the connection tracking state.
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If unsure, say `N'.
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config NF_CONNTRACK_TIMESTAMP
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bool 'Connection tracking timestamping'
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depends on NETFILTER_ADVANCED
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help
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This option enables support for connection tracking timestamping.
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This allows you to store the flow start-time and to obtain
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the flow-stop time (once it has been destroyed) via Connection
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tracking events.
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If unsure, say `N'.
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config NF_CT_PROTO_DCCP
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tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)'
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depends on EXPERIMENTAL
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depends on NETFILTER_ADVANCED
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default IP_DCCP
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help
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With this option enabled, the layer 3 independent connection
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tracking code will be able to do state tracking on DCCP connections.
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If unsure, say 'N'.
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config NF_CT_PROTO_GRE
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tristate
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config NF_CT_PROTO_SCTP
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tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
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depends on EXPERIMENTAL
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depends on NETFILTER_ADVANCED
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default IP_SCTP
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help
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With this option enabled, the layer 3 independent connection
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tracking code will be able to do state tracking on SCTP connections.
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If you want to compile it as a module, say M here and read
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<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
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config NF_CT_PROTO_UDPLITE
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tristate 'UDP-Lite protocol connection tracking support'
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depends on NETFILTER_ADVANCED
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help
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With this option enabled, the layer 3 independent connection
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tracking code will be able to do state tracking on UDP-Lite
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connections.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_AMANDA
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tristate "Amanda backup protocol support"
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depends on NETFILTER_ADVANCED
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select TEXTSEARCH
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select TEXTSEARCH_KMP
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help
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If you are running the Amanda backup package <http://www.amanda.org/>
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on this machine or machines that will be MASQUERADED through this
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machine, then you may want to enable this feature. This allows the
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connection tracking and natting code to allow the sub-channels that
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Amanda requires for communication of the backup data, messages and
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index.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_FTP
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tristate "FTP protocol support"
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default m if NETFILTER_ADVANCED=n
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help
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Tracking FTP connections is problematic: special helpers are
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required for tracking them, and doing masquerading and other forms
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of Network Address Translation on them.
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This is FTP support on Layer 3 independent connection tracking.
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Layer 3 independent connection tracking is experimental scheme
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which generalize ip_conntrack to support other layer 3 protocols.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_H323
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tristate "H.323 protocol support"
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depends on (IPV6 || IPV6=n)
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depends on NETFILTER_ADVANCED
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help
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H.323 is a VoIP signalling protocol from ITU-T. As one of the most
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important VoIP protocols, it is widely used by voice hardware and
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software including voice gateways, IP phones, Netmeeting, OpenPhone,
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Gnomemeeting, etc.
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With this module you can support H.323 on a connection tracking/NAT
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firewall.
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This module supports RAS, Fast Start, H.245 Tunnelling, Call
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Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
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whiteboard, file transfer, etc. For more information, please
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visit http://nath323.sourceforge.net/.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_IRC
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tristate "IRC protocol support"
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default m if NETFILTER_ADVANCED=n
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help
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There is a commonly-used extension to IRC called
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Direct Client-to-Client Protocol (DCC). This enables users to send
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files to each other, and also chat to each other without the need
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of a server. DCC Sending is used anywhere you send files over IRC,
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and DCC Chat is most commonly used by Eggdrop bots. If you are
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using NAT, this extension will enable you to send files and initiate
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chats. Note that you do NOT need this extension to get files or
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have others initiate chats, or everything else in IRC.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_BROADCAST
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tristate
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config NF_CONNTRACK_NETBIOS_NS
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tristate "NetBIOS name service protocol support"
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select NF_CONNTRACK_BROADCAST
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help
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NetBIOS name service requests are sent as broadcast messages from an
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unprivileged port and responded to with unicast messages to the
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same port. This make them hard to firewall properly because connection
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tracking doesn't deal with broadcasts. This helper tracks locally
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originating NetBIOS name service requests and the corresponding
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responses. It relies on correct IP address configuration, specifically
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netmask and broadcast address. When properly configured, the output
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of "ip address show" should look similar to this:
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$ ip -4 address show eth0
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4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
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inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_SNMP
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tristate "SNMP service protocol support"
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depends on NETFILTER_ADVANCED
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select NF_CONNTRACK_BROADCAST
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help
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SNMP service requests are sent as broadcast messages from an
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unprivileged port and responded to with unicast messages to the
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same port. This make them hard to firewall properly because connection
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tracking doesn't deal with broadcasts. This helper tracks locally
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originating SNMP service requests and the corresponding
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responses. It relies on correct IP address configuration, specifically
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netmask and broadcast address.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_PPTP
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tristate "PPtP protocol support"
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depends on NETFILTER_ADVANCED
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select NF_CT_PROTO_GRE
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help
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This module adds support for PPTP (Point to Point Tunnelling
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Protocol, RFC2637) connection tracking and NAT.
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If you are running PPTP sessions over a stateful firewall or NAT
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box, you may want to enable this feature.
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Please note that not all PPTP modes of operation are supported yet.
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Specifically these limitations exist:
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- Blindly assumes that control connections are always established
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in PNS->PAC direction. This is a violation of RFC2637.
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- Only supports a single call within each session
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_SANE
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tristate "SANE protocol support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on NETFILTER_ADVANCED
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help
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SANE is a protocol for remote access to scanners as implemented
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by the 'saned' daemon. Like FTP, it uses separate control and
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data connections.
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With this module you can support SANE on a connection tracking
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firewall.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_SIP
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tristate "SIP protocol support"
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default m if NETFILTER_ADVANCED=n
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help
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SIP is an application-layer control protocol that can establish,
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modify, and terminate multimedia sessions (conferences) such as
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Internet telephony calls. With the ip_conntrack_sip and
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the nf_nat_sip modules you can support the protocol on a connection
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tracking/NATing firewall.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CONNTRACK_TFTP
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tristate "TFTP protocol support"
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depends on NETFILTER_ADVANCED
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help
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TFTP connection tracking helper, this is required depending
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on how restrictive your ruleset is.
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If you are using a tftp client behind -j SNAT or -j MASQUERADING
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you will need this.
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To compile it as a module, choose M here. If unsure, say N.
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config NF_CT_NETLINK
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tristate 'Connection tracking netlink interface'
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select NETFILTER_NETLINK
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default m if NETFILTER_ADVANCED=n
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help
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This option enables support for a netlink-based userspace interface
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config NF_CT_NETLINK_TIMEOUT
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tristate 'Connection tracking timeout tuning via Netlink'
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select NETFILTER_NETLINK
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depends on NETFILTER_ADVANCED
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help
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This option enables support for connection tracking timeout
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fine-grain tuning. This allows you to attach specific timeout
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policies to flows, instead of using the global timeout policy.
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If unsure, say `N'.
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endif # NF_CONNTRACK
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# transparent proxy support
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config NETFILTER_TPROXY
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tristate "Transparent proxying support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on IP_NF_MANGLE
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depends on NETFILTER_ADVANCED
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help
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This option enables transparent proxying support, that is,
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support for handling non-locally bound IPv4 TCP and UDP sockets.
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For it to work you will have to configure certain iptables rules
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and use policy routing. For more information on how to set it up
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see Documentation/networking/tproxy.txt.
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To compile it as a module, choose M here. If unsure, say N.
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config NETFILTER_XTABLES
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tristate "Netfilter Xtables support (required for ip_tables)"
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default m if NETFILTER_ADVANCED=n
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help
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This is required if you intend to use any of ip_tables,
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ip6_tables or arp_tables.
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if NETFILTER_XTABLES
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comment "Xtables combined modules"
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config NETFILTER_XT_MARK
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tristate 'nfmark target and match support'
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default m if NETFILTER_ADVANCED=n
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---help---
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This option adds the "MARK" target and "mark" match.
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Netfilter mark matching allows you to match packets based on the
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"nfmark" value in the packet.
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The target allows you to create rules in the "mangle" table which alter
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the netfilter mark (nfmark) field associated with the packet.
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Prior to routing, the nfmark can influence the routing method (see
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"Use netfilter MARK value as routing key") and can also be used by
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other subsystems to change their behavior.
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config NETFILTER_XT_CONNMARK
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tristate 'ctmark target and match support'
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depends on NF_CONNTRACK
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depends on NETFILTER_ADVANCED
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select NF_CONNTRACK_MARK
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---help---
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This option adds the "CONNMARK" target and "connmark" match.
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Netfilter allows you to store a mark value per connection (a.k.a.
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ctmark), similarly to the packet mark (nfmark). Using this
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target and match, you can set and match on this mark.
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config NETFILTER_XT_SET
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tristate 'set target and match support'
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depends on IP_SET
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depends on NETFILTER_ADVANCED
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help
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This option adds the "SET" target and "set" match.
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Using this target and match, you can add/delete and match
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elements in the sets created by ipset(8).
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To compile it as a module, choose M here. If unsure, say N.
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# alphabetically ordered list of targets
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comment "Xtables targets"
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config NETFILTER_XT_TARGET_AUDIT
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tristate "AUDIT target support"
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depends on AUDIT
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depends on NETFILTER_ADVANCED
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---help---
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This option adds a 'AUDIT' target, which can be used to create
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audit records for packets dropped/accepted.
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To compileit as a module, choose M here. If unsure, say N.
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config NETFILTER_XT_TARGET_CHECKSUM
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tristate "CHECKSUM target support"
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depends on IP_NF_MANGLE || IP6_NF_MANGLE
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depends on NETFILTER_ADVANCED
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---help---
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This option adds a `CHECKSUM' target, which can be used in the iptables mangle
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table.
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You can use this target to compute and fill in the checksum in
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a packet that lacks a checksum. This is particularly useful,
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if you need to work around old applications such as dhcp clients,
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that do not work well with checksum offloads, but don't want to disable
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checksum offload in your device.
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To compile it as a module, choose M here. If unsure, say N.
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config NETFILTER_XT_TARGET_CLASSIFY
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tristate '"CLASSIFY" target support'
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depends on NETFILTER_ADVANCED
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help
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This option adds a `CLASSIFY' target, which enables the user to set
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the priority of a packet. Some qdiscs can use this value for
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classification, among these are:
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atm, cbq, dsmark, pfifo_fast, htb, prio
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|
To compile it as a module, choose M here. If unsure, say N.
|
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|
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config NETFILTER_XT_TARGET_CONNMARK
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tristate '"CONNMARK" target support'
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depends on NF_CONNTRACK
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depends on NETFILTER_ADVANCED
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select NETFILTER_XT_CONNMARK
|
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---help---
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This is a backwards-compat option for the user's convenience
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(e.g. when running oldconfig). It selects
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CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
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config NETFILTER_XT_TARGET_CONNSECMARK
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tristate '"CONNSECMARK" target support'
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depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
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default m if NETFILTER_ADVANCED=n
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help
|
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The CONNSECMARK target copies security markings from packets
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to connections, and restores security markings from connections
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to packets (if the packets are not already marked). This would
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normally be used in conjunction with the SECMARK target.
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To compile it as a module, choose M here. If unsure, say N.
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|
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config NETFILTER_XT_TARGET_CT
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tristate '"CT" target support'
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depends on NF_CONNTRACK
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depends on IP_NF_RAW || IP6_NF_RAW
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|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This options adds a `CT' target, which allows to specify initial
|
|
connection tracking parameters like events to be delivered and
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the helper to be used.
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|
|
To compile it as a module, choose M here. If unsure, say N.
|
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|
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config NETFILTER_XT_TARGET_DSCP
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tristate '"DSCP" and "TOS" target support'
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depends on IP_NF_MANGLE || IP6_NF_MANGLE
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depends on NETFILTER_ADVANCED
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|
help
|
|
This option adds a `DSCP' target, which allows you to manipulate
|
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the IPv4/IPv6 header DSCP field (differentiated services codepoint).
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|
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The DSCP field can have any value between 0x0 and 0x3f inclusive.
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|
|
It also adds the "TOS" target, which allows you to create rules in
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|
the "mangle" table which alter the Type Of Service field of an IPv4
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or the Priority field of an IPv6 packet, prior to routing.
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|
|
To compile it as a module, choose M here. If unsure, say N.
|
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|
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config NETFILTER_XT_TARGET_HL
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tristate '"HL" hoplimit target support'
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depends on IP_NF_MANGLE || IP6_NF_MANGLE
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depends on NETFILTER_ADVANCED
|
|
---help---
|
|
This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
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|
targets, which enable the user to change the
|
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hoplimit/time-to-live value of the IP header.
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|
|
While it is safe to decrement the hoplimit/TTL value, the
|
|
modules also allow to increment and set the hoplimit value of
|
|
the header to arbitrary values. This is EXTREMELY DANGEROUS
|
|
since you can easily create immortal packets that loop
|
|
forever on the network.
|
|
|
|
config NETFILTER_XT_TARGET_IDLETIMER
|
|
tristate "IDLETIMER target support"
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
|
|
This option adds the `IDLETIMER' target. Each matching packet
|
|
resets the timer associated with label specified when the rule is
|
|
added. When the timer expires, it triggers a sysfs notification.
|
|
The remaining time for expiration can be read via sysfs.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_TARGET_LED
|
|
tristate '"LED" target support'
|
|
depends on LEDS_CLASS && LEDS_TRIGGERS
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `LED' target, which allows you to blink LEDs in
|
|
response to particular packets passing through your machine.
|
|
|
|
This can be used to turn a spare LED into a network activity LED,
|
|
which only flashes in response to FTP transfers, for example. Or
|
|
you could have an LED which lights up for a minute or two every time
|
|
somebody connects to your machine via SSH.
|
|
|
|
You will need support for the "led" class to make this work.
|
|
|
|
To create an LED trigger for incoming SSH traffic:
|
|
iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
|
|
|
|
Then attach the new trigger to an LED on your system:
|
|
echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
|
|
|
|
For more information on the LEDs available on your system, see
|
|
Documentation/leds/leds-class.txt
|
|
|
|
config NETFILTER_XT_TARGET_LOG
|
|
tristate "LOG target support"
|
|
default m if NETFILTER_ADVANCED=n
|
|
help
|
|
This option adds a `LOG' target, which allows you to create rules in
|
|
any iptables table which records the packet header to the syslog.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_TARGET_MARK
|
|
tristate '"MARK" target support'
|
|
depends on NETFILTER_ADVANCED
|
|
select NETFILTER_XT_MARK
|
|
---help---
|
|
This is a backwards-compat option for the user's convenience
|
|
(e.g. when running oldconfig). It selects
|
|
CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
|
|
|
|
config NETFILTER_XT_TARGET_NFLOG
|
|
tristate '"NFLOG" target support'
|
|
default m if NETFILTER_ADVANCED=n
|
|
select NETFILTER_NETLINK_LOG
|
|
help
|
|
This option enables the NFLOG target, which allows to LOG
|
|
messages through nfnetlink_log.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_TARGET_NFQUEUE
|
|
tristate '"NFQUEUE" target Support'
|
|
depends on NETFILTER_ADVANCED
|
|
select NETFILTER_NETLINK_QUEUE
|
|
help
|
|
This target replaced the old obsolete QUEUE target.
|
|
|
|
As opposed to QUEUE, it supports 65535 different queues,
|
|
not just one.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_TARGET_NOTRACK
|
|
tristate '"NOTRACK" target support'
|
|
depends on IP_NF_RAW || IP6_NF_RAW
|
|
depends on NF_CONNTRACK
|
|
help
|
|
The NOTRACK target allows a select rule to specify
|
|
which packets *not* to enter the conntrack/NAT
|
|
subsystem with all the consequences (no ICMP error tracking,
|
|
no protocol helpers for the selected packets).
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_TARGET_RATEEST
|
|
tristate '"RATEEST" target support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `RATEEST' target, which allows to measure
|
|
rates similar to TC estimators. The `rateest' match can be
|
|
used to match on the measured rates.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_TARGET_TEE
|
|
tristate '"TEE" - packet cloning to alternate destination'
|
|
depends on NETFILTER_ADVANCED
|
|
depends on (IPV6 || IPV6=n)
|
|
depends on !NF_CONNTRACK || NF_CONNTRACK
|
|
---help---
|
|
This option adds a "TEE" target with which a packet can be cloned and
|
|
this clone be rerouted to another nexthop.
|
|
|
|
config NETFILTER_XT_TARGET_TPROXY
|
|
tristate '"TPROXY" target support (EXPERIMENTAL)'
|
|
depends on EXPERIMENTAL
|
|
depends on NETFILTER_TPROXY
|
|
depends on NETFILTER_XTABLES
|
|
depends on NETFILTER_ADVANCED
|
|
select NF_DEFRAG_IPV4
|
|
select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
|
|
help
|
|
This option adds a `TPROXY' target, which is somewhat similar to
|
|
REDIRECT. It can only be used in the mangle table and is useful
|
|
to redirect traffic to a transparent proxy. It does _not_ depend
|
|
on Netfilter connection tracking and NAT, unlike REDIRECT.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_TARGET_TRACE
|
|
tristate '"TRACE" target support'
|
|
depends on IP_NF_RAW || IP6_NF_RAW
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
The TRACE target allows you to mark packets so that the kernel
|
|
will log every rule which match the packets as those traverse
|
|
the tables, chains, rules.
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_TARGET_SECMARK
|
|
tristate '"SECMARK" target support'
|
|
depends on NETWORK_SECMARK
|
|
default m if NETFILTER_ADVANCED=n
|
|
help
|
|
The SECMARK target allows security marking of network
|
|
packets, for use with security subsystems.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_TARGET_TCPMSS
|
|
tristate '"TCPMSS" target support'
|
|
depends on (IPV6 || IPV6=n)
|
|
default m if NETFILTER_ADVANCED=n
|
|
---help---
|
|
This option adds a `TCPMSS' target, which allows you to alter the
|
|
MSS value of TCP SYN packets, to control the maximum size for that
|
|
connection (usually limiting it to your outgoing interface's MTU
|
|
minus 40).
|
|
|
|
This is used to overcome criminally braindead ISPs or servers which
|
|
block ICMP Fragmentation Needed packets. The symptoms of this
|
|
problem are that everything works fine from your Linux
|
|
firewall/router, but machines behind it can never exchange large
|
|
packets:
|
|
1) Web browsers connect, then hang with no data received.
|
|
2) Small mail works fine, but large emails hang.
|
|
3) ssh works fine, but scp hangs after initial handshaking.
|
|
|
|
Workaround: activate this option and add a rule to your firewall
|
|
configuration like:
|
|
|
|
iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
|
|
-j TCPMSS --clamp-mss-to-pmtu
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_TARGET_TCPOPTSTRIP
|
|
tristate '"TCPOPTSTRIP" target support (EXPERIMENTAL)'
|
|
depends on EXPERIMENTAL
|
|
depends on IP_NF_MANGLE || IP6_NF_MANGLE
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a "TCPOPTSTRIP" target, which allows you to strip
|
|
TCP options from TCP packets.
|
|
|
|
# alphabetically ordered list of matches
|
|
|
|
comment "Xtables matches"
|
|
|
|
config NETFILTER_XT_MATCH_ADDRTYPE
|
|
tristate '"addrtype" address type match support'
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
This option allows you to match what routing thinks of an address,
|
|
eg. UNICAST, LOCAL, BROADCAST, ...
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_MATCH_CLUSTER
|
|
tristate '"cluster" match support'
|
|
depends on NF_CONNTRACK
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
This option allows you to build work-load-sharing clusters of
|
|
network servers/stateful firewalls without having a dedicated
|
|
load-balancing router/server/switch. Basically, this match returns
|
|
true when the packet must be handled by this cluster node. Thus,
|
|
all nodes see all packets and this match decides which node handles
|
|
what packets. The work-load sharing algorithm is based on source
|
|
address hashing.
|
|
|
|
If you say Y or M here, try `iptables -m cluster --help` for
|
|
more information.
|
|
|
|
config NETFILTER_XT_MATCH_COMMENT
|
|
tristate '"comment" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `comment' dummy-match, which allows you to put
|
|
comments in your iptables ruleset.
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_MATCH_CONNBYTES
|
|
tristate '"connbytes" per-connection counter match support'
|
|
depends on NF_CONNTRACK
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `connbytes' match, which allows you to match the
|
|
number of bytes and/or packets for each direction within a connection.
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_MATCH_CONNLIMIT
|
|
tristate '"connlimit" match support"'
|
|
depends on NF_CONNTRACK
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
This match allows you to match against the number of parallel
|
|
connections to a server per client IP address (or address block).
|
|
|
|
config NETFILTER_XT_MATCH_CONNMARK
|
|
tristate '"connmark" connection mark match support'
|
|
depends on NF_CONNTRACK
|
|
depends on NETFILTER_ADVANCED
|
|
select NETFILTER_XT_CONNMARK
|
|
---help---
|
|
This is a backwards-compat option for the user's convenience
|
|
(e.g. when running oldconfig). It selects
|
|
CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
|
|
|
|
config NETFILTER_XT_MATCH_CONNTRACK
|
|
tristate '"conntrack" connection tracking match support'
|
|
depends on NF_CONNTRACK
|
|
default m if NETFILTER_ADVANCED=n
|
|
help
|
|
This is a general conntrack match module, a superset of the state match.
|
|
|
|
It allows matching on additional conntrack information, which is
|
|
useful in complex configurations, such as NAT gateways with multiple
|
|
internet links or tunnels.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_CPU
|
|
tristate '"cpu" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
CPU matching allows you to match packets based on the CPU
|
|
currently handling the packet.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_DCCP
|
|
tristate '"dccp" protocol match support'
|
|
depends on NETFILTER_ADVANCED
|
|
default IP_DCCP
|
|
help
|
|
With this option enabled, you will be able to use the iptables
|
|
`dccp' match in order to match on DCCP source/destination ports
|
|
and DCCP flags.
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_MATCH_DEVGROUP
|
|
tristate '"devgroup" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This options adds a `devgroup' match, which allows to match on the
|
|
device group a network device is assigned to.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_DSCP
|
|
tristate '"dscp" and "tos" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `DSCP' match, which allows you to match against
|
|
the IPv4/IPv6 header DSCP field (differentiated services codepoint).
|
|
|
|
The DSCP field can have any value between 0x0 and 0x3f inclusive.
|
|
|
|
It will also add a "tos" match, which allows you to match packets
|
|
based on the Type Of Service fields of the IPv4 packet (which share
|
|
the same bits as DSCP).
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_ECN
|
|
tristate '"ecn" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
This option adds an "ECN" match, which allows you to match against
|
|
the IPv4 and TCP header ECN fields.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_ESP
|
|
tristate '"esp" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This match extension allows you to match a range of SPIs
|
|
inside ESP header of IPSec packets.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_HASHLIMIT
|
|
tristate '"hashlimit" match support'
|
|
depends on (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `hashlimit' match.
|
|
|
|
As opposed to `limit', this match dynamically creates a hash table
|
|
of limit buckets, based on your selection of source/destination
|
|
addresses and/or ports.
|
|
|
|
It enables you to express policies like `10kpps for any given
|
|
destination address' or `500pps from any given source address'
|
|
with a single rule.
|
|
|
|
config NETFILTER_XT_MATCH_HELPER
|
|
tristate '"helper" match support'
|
|
depends on NF_CONNTRACK
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
Helper matching allows you to match packets in dynamic connections
|
|
tracked by a conntrack-helper, ie. ip_conntrack_ftp
|
|
|
|
To compile it as a module, choose M here. If unsure, say Y.
|
|
|
|
config NETFILTER_XT_MATCH_HL
|
|
tristate '"hl" hoplimit/TTL match support'
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
HL matching allows you to match packets based on the hoplimit
|
|
in the IPv6 header, or the time-to-live field in the IPv4
|
|
header of the packet.
|
|
|
|
config NETFILTER_XT_MATCH_IPRANGE
|
|
tristate '"iprange" address range match support'
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
This option adds a "iprange" match, which allows you to match based on
|
|
an IP address range. (Normal iptables only matches on single addresses
|
|
with an optional mask.)
|
|
|
|
If unsure, say M.
|
|
|
|
config NETFILTER_XT_MATCH_IPVS
|
|
tristate '"ipvs" match support'
|
|
depends on IP_VS
|
|
depends on NETFILTER_ADVANCED
|
|
depends on NF_CONNTRACK
|
|
help
|
|
This option allows you to match against IPVS properties of a packet.
|
|
|
|
If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_LENGTH
|
|
tristate '"length" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option allows you to match the length of a packet against a
|
|
specific value or range of values.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_LIMIT
|
|
tristate '"limit" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
limit matching allows you to control the rate at which a rule can be
|
|
matched: mainly useful in combination with the LOG target ("LOG
|
|
target support", below) and to avoid some Denial of Service attacks.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_MAC
|
|
tristate '"mac" address match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
MAC matching allows you to match packets based on the source
|
|
Ethernet address of the packet.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_MARK
|
|
tristate '"mark" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
select NETFILTER_XT_MARK
|
|
---help---
|
|
This is a backwards-compat option for the user's convenience
|
|
(e.g. when running oldconfig). It selects
|
|
CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
|
|
|
|
config NETFILTER_XT_MATCH_MULTIPORT
|
|
tristate '"multiport" Multiple port match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
Multiport matching allows you to match TCP or UDP packets based on
|
|
a series of source or destination ports: normally a rule can only
|
|
match a single range of ports.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_NFACCT
|
|
tristate '"nfacct" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
select NETFILTER_NETLINK_ACCT
|
|
help
|
|
This option allows you to use the extended accounting through
|
|
nfnetlink_acct.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_OSF
|
|
tristate '"osf" Passive OS fingerprint match'
|
|
depends on NETFILTER_ADVANCED && NETFILTER_NETLINK
|
|
help
|
|
This option selects the Passive OS Fingerprinting match module
|
|
that allows to passively match the remote operating system by
|
|
analyzing incoming TCP SYN packets.
|
|
|
|
Rules and loading software can be downloaded from
|
|
http://www.ioremap.net/projects/osf
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_OWNER
|
|
tristate '"owner" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
Socket owner matching allows you to match locally-generated packets
|
|
based on who created the socket: the user or group. It is also
|
|
possible to check whether a socket actually exists.
|
|
|
|
config NETFILTER_XT_MATCH_POLICY
|
|
tristate 'IPsec "policy" match support'
|
|
depends on XFRM
|
|
default m if NETFILTER_ADVANCED=n
|
|
help
|
|
Policy matching allows you to match packets based on the
|
|
IPsec policy that was used during decapsulation/will
|
|
be used during encapsulation.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_PHYSDEV
|
|
tristate '"physdev" match support'
|
|
depends on BRIDGE && BRIDGE_NETFILTER
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
Physdev packet matching matches against the physical bridge ports
|
|
the IP packet arrived on or will leave by.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_PKTTYPE
|
|
tristate '"pkttype" packet type match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
Packet type matching allows you to match a packet by
|
|
its "class", eg. BROADCAST, MULTICAST, ...
|
|
|
|
Typical usage:
|
|
iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_QUOTA
|
|
tristate '"quota" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `quota' match, which allows to match on a
|
|
byte counter.
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_MATCH_RATEEST
|
|
tristate '"rateest" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
select NETFILTER_XT_TARGET_RATEEST
|
|
help
|
|
This option adds a `rateest' match, which allows to match on the
|
|
rate estimated by the RATEEST target.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_REALM
|
|
tristate '"realm" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
select IP_ROUTE_CLASSID
|
|
help
|
|
This option adds a `realm' match, which allows you to use the realm
|
|
key from the routing subsystem inside iptables.
|
|
|
|
This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
|
|
in tc world.
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_MATCH_RECENT
|
|
tristate '"recent" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
This match is used for creating one or many lists of recently
|
|
used addresses and then matching against that/those list(s).
|
|
|
|
Short options are available by using 'iptables -m recent -h'
|
|
Official Website: <http://snowman.net/projects/ipt_recent/>
|
|
|
|
config NETFILTER_XT_MATCH_SCTP
|
|
tristate '"sctp" protocol match support (EXPERIMENTAL)'
|
|
depends on EXPERIMENTAL
|
|
depends on NETFILTER_ADVANCED
|
|
default IP_SCTP
|
|
help
|
|
With this option enabled, you will be able to use the
|
|
`sctp' match in order to match on SCTP source/destination ports
|
|
and SCTP chunk types.
|
|
|
|
If you want to compile it as a module, say M here and read
|
|
<file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
|
|
|
|
config NETFILTER_XT_MATCH_SOCKET
|
|
tristate '"socket" match support (EXPERIMENTAL)'
|
|
depends on EXPERIMENTAL
|
|
depends on NETFILTER_TPROXY
|
|
depends on NETFILTER_XTABLES
|
|
depends on NETFILTER_ADVANCED
|
|
depends on !NF_CONNTRACK || NF_CONNTRACK
|
|
select NF_DEFRAG_IPV4
|
|
select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
|
|
help
|
|
This option adds a `socket' match, which can be used to match
|
|
packets for which a TCP or UDP socket lookup finds a valid socket.
|
|
It can be used in combination with the MARK target and policy
|
|
routing to implement full featured non-locally bound sockets.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_STATE
|
|
tristate '"state" match support'
|
|
depends on NF_CONNTRACK
|
|
default m if NETFILTER_ADVANCED=n
|
|
help
|
|
Connection state matching allows you to match packets based on their
|
|
relationship to a tracked connection (ie. previous packets). This
|
|
is a powerful tool for packet classification.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_STATISTIC
|
|
tristate '"statistic" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `statistic' match, which allows you to match
|
|
on packets periodically or randomly with a given percentage.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_STRING
|
|
tristate '"string" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
select TEXTSEARCH
|
|
select TEXTSEARCH_KMP
|
|
select TEXTSEARCH_BM
|
|
select TEXTSEARCH_FSM
|
|
help
|
|
This option adds a `string' match, which allows you to look for
|
|
pattern matchings in packets.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_TCPMSS
|
|
tristate '"tcpmss" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
help
|
|
This option adds a `tcpmss' match, which allows you to examine the
|
|
MSS value of TCP SYN packets, which control the maximum packet size
|
|
for that connection.
|
|
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_TIME
|
|
tristate '"time" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
This option adds a "time" match, which allows you to match based on
|
|
the packet arrival time (at the machine which netfilter is running)
|
|
on) or departure time/date (for locally generated packets).
|
|
|
|
If you say Y here, try `iptables -m time --help` for
|
|
more information.
|
|
|
|
If you want to compile it as a module, say M here.
|
|
If unsure, say N.
|
|
|
|
config NETFILTER_XT_MATCH_U32
|
|
tristate '"u32" match support'
|
|
depends on NETFILTER_ADVANCED
|
|
---help---
|
|
u32 allows you to extract quantities of up to 4 bytes from a packet,
|
|
AND them with specified masks, shift them by specified amounts and
|
|
test whether the results are in any of a set of specified ranges.
|
|
The specification of what to extract is general enough to skip over
|
|
headers with lengths stored in the packet, as in IP or TCP header
|
|
lengths.
|
|
|
|
Details and examples are in the kernel module source.
|
|
|
|
endif # NETFILTER_XTABLES
|
|
|
|
endmenu
|
|
|
|
source "net/netfilter/ipset/Kconfig"
|
|
|
|
source "net/netfilter/ipvs/Kconfig"
|