# SPDX-License-Identifier: GPL-2.0-only
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menu "Core Netfilter Configuration"
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depends on NET && INET && NETFILTER
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config NETFILTER_INGRESS
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bool "Netfilter ingress support"
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default y
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select NET_INGRESS
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help
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This allows you to classify packets from ingress using the Netfilter
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infrastructure.
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config NETFILTER_NETLINK
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tristate
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config NETFILTER_FAMILY_BRIDGE
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bool
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config NETFILTER_FAMILY_ARP
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bool
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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 NETFILTER_NETLINK_OSF
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tristate "Netfilter OSF 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 passive OS fingerprint via NFNETLINK.
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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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select NF_DEFRAG_IPV4
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select NF_DEFRAG_IPV6 if IPV6 != 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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config NF_LOG_COMMON
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tristate
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config NF_LOG_NETDEV
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tristate "Netdev packet logging"
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select NF_LOG_COMMON
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if NF_CONNTRACK
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config NETFILTER_CONNCOUNT
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tristate
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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 y 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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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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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_TIMEOUT
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bool 'Connection tracking timeout'
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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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extension. This allows you to attach timeout policies to flow
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via the CT target.
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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_CONNTRACK_LABELS
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bool "Connection tracking labels"
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help
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This option enables support for assigning user-defined flag bits
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to connection tracking entries. It can be used with xtables connlabel
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match and the nftables ct expression.
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config NF_CT_PROTO_DCCP
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bool 'DCCP protocol connection tracking support'
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depends on NETFILTER_ADVANCED
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default y
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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 Y.
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config NF_CT_PROTO_GRE
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bool
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config NF_CT_PROTO_SCTP
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bool 'SCTP protocol connection tracking support'
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depends on NETFILTER_ADVANCED
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default y
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select LIBCRC32C
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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 unsure, say Y.
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config NF_CT_PROTO_UDPLITE
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bool 'UDP-Lite protocol connection tracking support'
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depends on NETFILTER_ADVANCED
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default y
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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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If unsure, say Y.
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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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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"
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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 nf_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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depends on NF_CONNTRACK_TIMEOUT
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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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config NF_CT_NETLINK_HELPER
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tristate 'Connection tracking helpers in user-space via Netlink'
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select NETFILTER_NETLINK
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depends on NF_CT_NETLINK
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depends on NETFILTER_NETLINK_QUEUE
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depends on NETFILTER_NETLINK_GLUE_CT
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depends on NETFILTER_ADVANCED
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help
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This option enables the user-space connection tracking helpers
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infrastructure.
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If unsure, say `N'.
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config NETFILTER_NETLINK_GLUE_CT
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bool "NFQUEUE and NFLOG integration with Connection Tracking"
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default n
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depends on (NETFILTER_NETLINK_QUEUE || NETFILTER_NETLINK_LOG) && NF_CT_NETLINK
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help
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If this option is enabled, NFQUEUE and NFLOG can include
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Connection Tracking information together with the packet is
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the enqueued via NFNETLINK.
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config NF_NAT
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tristate "Network Address Translation support"
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depends on NF_CONNTRACK
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default m if NETFILTER_ADVANCED=n
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help
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The NAT option allows masquerading, port forwarding and other
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forms of full Network Address Port Translation. This can be
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controlled by iptables, ip6tables or nft.
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config NF_NAT_AMANDA
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tristate
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depends on NF_CONNTRACK && NF_NAT
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default NF_NAT && NF_CONNTRACK_AMANDA
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config NF_NAT_FTP
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tristate
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depends on NF_CONNTRACK && NF_NAT
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default NF_NAT && NF_CONNTRACK_FTP
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config NF_NAT_IRC
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tristate
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depends on NF_CONNTRACK && NF_NAT
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default NF_NAT && NF_CONNTRACK_IRC
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config NF_NAT_SIP
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tristate
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depends on NF_CONNTRACK && NF_NAT
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default NF_NAT && NF_CONNTRACK_SIP
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config NF_NAT_TFTP
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tristate
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depends on NF_CONNTRACK && NF_NAT
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default NF_NAT && NF_CONNTRACK_TFTP
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config NF_NAT_REDIRECT
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bool
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config NF_NAT_MASQUERADE
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bool
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config NETFILTER_SYNPROXY
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tristate
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endif # NF_CONNTRACK
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config NF_TABLES
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select NETFILTER_NETLINK
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select LIBCRC32C
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tristate "Netfilter nf_tables support"
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help
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nftables is the new packet classification framework that intends to
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replace the existing {ip,ip6,arp,eb}_tables infrastructure. It
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provides a pseudo-state machine with an extensible instruction-set
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(also known as expressions) that the userspace 'nft' utility
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(https://www.netfilter.org/projects/nftables) uses to build the
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rule-set. It also comes with the generic set infrastructure that
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allows you to construct mappings between matchings and actions
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for performance lookups.
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To compile it as a module, choose M here.
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if NF_TABLES
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config NF_TABLES_INET
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depends on IPV6
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select NF_TABLES_IPV4
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select NF_TABLES_IPV6
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bool "Netfilter nf_tables mixed IPv4/IPv6 tables support"
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help
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This option enables support for a mixed IPv4/IPv6 "inet" table.
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config NF_TABLES_NETDEV
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bool "Netfilter nf_tables netdev tables support"
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help
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This option enables support for the "netdev" table.
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config NFT_NUMGEN
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tristate "Netfilter nf_tables number generator module"
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help
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This option adds the number generator expression used to perform
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incremental counting and random numbers bound to a upper limit.
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config NFT_CT
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depends on NF_CONNTRACK
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tristate "Netfilter nf_tables conntrack module"
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help
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This option adds the "ct" expression that you can use to match
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connection tracking information such as the flow state.
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config NFT_FLOW_OFFLOAD
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depends on NF_CONNTRACK && NF_FLOW_TABLE
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tristate "Netfilter nf_tables hardware flow offload module"
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help
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This option adds the "flow_offload" expression that you can use to
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choose what flows are placed into the hardware.
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config NFT_COUNTER
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tristate "Netfilter nf_tables counter module"
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help
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This option adds the "counter" expression that you can use to
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include packet and byte counters in a rule.
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config NFT_CONNLIMIT
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tristate "Netfilter nf_tables connlimit module"
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depends on NF_CONNTRACK
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depends on NETFILTER_ADVANCED
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select NETFILTER_CONNCOUNT
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help
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This option adds the "connlimit" expression that you can use to
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ratelimit rule matchings per connections.
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config NFT_LOG
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tristate "Netfilter nf_tables log module"
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help
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This option adds the "log" expression that you can use to log
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packets matching some criteria.
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config NFT_LIMIT
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tristate "Netfilter nf_tables limit module"
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help
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This option adds the "limit" expression that you can use to
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ratelimit rule matchings.
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config NFT_MASQ
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depends on NF_CONNTRACK
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depends on NF_NAT
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select NF_NAT_MASQUERADE
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tristate "Netfilter nf_tables masquerade support"
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help
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This option adds the "masquerade" expression that you can use
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to perform NAT in the masquerade flavour.
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config NFT_REDIR
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depends on NF_CONNTRACK
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depends on NF_NAT
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tristate "Netfilter nf_tables redirect support"
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select NF_NAT_REDIRECT
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help
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This options adds the "redirect" expression that you can use
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to perform NAT in the redirect flavour.
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config NFT_NAT
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depends on NF_CONNTRACK
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select NF_NAT
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depends on NF_TABLES_IPV4 || NF_TABLES_IPV6
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tristate "Netfilter nf_tables nat module"
|
help
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This option adds the "nat" expression that you can use to perform
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typical Network Address Translation (NAT) packet transformations.
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config NFT_TUNNEL
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tristate "Netfilter nf_tables tunnel module"
|
help
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This option adds the "tunnel" expression that you can use to set
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tunneling policies.
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config NFT_OBJREF
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tristate "Netfilter nf_tables stateful object reference module"
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help
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This option adds the "objref" expression that allows you to refer to
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stateful objects, such as counters and quotas.
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config NFT_QUEUE
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depends on NETFILTER_NETLINK_QUEUE
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tristate "Netfilter nf_tables queue module"
|
help
|
This is required if you intend to use the userspace queueing
|
infrastructure (also known as NFQUEUE) from nftables.
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config NFT_QUOTA
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tristate "Netfilter nf_tables quota module"
|
help
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This option adds the "quota" expression that you can use to match
|
enforce bytes quotas.
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config NFT_REJECT
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default m if NETFILTER_ADVANCED=n
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tristate "Netfilter nf_tables reject support"
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depends on !NF_TABLES_INET || (IPV6!=m || m)
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help
|
This option adds the "reject" expression that you can use to
|
explicitly deny and notify via TCP reset/ICMP informational errors
|
unallowed traffic.
|
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config NFT_REJECT_INET
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depends on NF_TABLES_INET
|
default NFT_REJECT
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tristate
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config NFT_COMPAT
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depends on NETFILTER_XTABLES
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tristate "Netfilter x_tables over nf_tables module"
|
help
|
This is required if you intend to use any of existing
|
x_tables match/target extensions over the nf_tables
|
framework.
|
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config NFT_HASH
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tristate "Netfilter nf_tables hash module"
|
help
|
This option adds the "hash" expression that you can use to perform
|
a hash operation on registers.
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config NFT_FIB
|
tristate
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config NFT_FIB_INET
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depends on NF_TABLES_INET
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depends on NFT_FIB_IPV4
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depends on NFT_FIB_IPV6
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tristate "Netfilter nf_tables fib inet support"
|
help
|
This option allows using the FIB expression from the inet table.
|
The lookup will be delegated to the IPv4 or IPv6 FIB depending
|
on the protocol of the packet.
|
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config NFT_XFRM
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tristate "Netfilter nf_tables xfrm/IPSec security association matching"
|
depends on XFRM
|
help
|
This option adds an expression that you can use to extract properties
|
of a packets security association.
|
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config NFT_SOCKET
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tristate "Netfilter nf_tables socket match support"
|
depends on IPV6 || IPV6=n
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select NF_SOCKET_IPV4
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select NF_SOCKET_IPV6 if NF_TABLES_IPV6
|
help
|
This option allows matching for the presence or absence of a
|
corresponding socket and its attributes.
|
|
config NFT_OSF
|
tristate "Netfilter nf_tables passive OS fingerprint support"
|
depends on NETFILTER_ADVANCED
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select NETFILTER_NETLINK_OSF
|
help
|
This option allows matching packets from an specific OS.
|
|
config NFT_TPROXY
|
tristate "Netfilter nf_tables tproxy support"
|
depends on IPV6 || IPV6=n
|
select NF_DEFRAG_IPV4
|
select NF_DEFRAG_IPV6 if NF_TABLES_IPV6
|
select NF_TPROXY_IPV4
|
select NF_TPROXY_IPV6 if NF_TABLES_IPV6
|
help
|
This makes transparent proxy support available in nftables.
|
|
config NFT_SYNPROXY
|
tristate "Netfilter nf_tables SYNPROXY expression support"
|
depends on NF_CONNTRACK && NETFILTER_ADVANCED
|
select NETFILTER_SYNPROXY
|
select SYN_COOKIES
|
help
|
The SYNPROXY expression allows you to intercept TCP connections and
|
establish them using syncookies before they are passed on to the
|
server. This allows to avoid conntrack and server resource usage
|
during SYN-flood attacks.
|
|
if NF_TABLES_NETDEV
|
|
config NF_DUP_NETDEV
|
tristate "Netfilter packet duplication support"
|
help
|
This option enables the generic packet duplication infrastructure
|
for Netfilter.
|
|
config NFT_DUP_NETDEV
|
tristate "Netfilter nf_tables netdev packet duplication support"
|
select NF_DUP_NETDEV
|
help
|
This option enables packet duplication for the "netdev" family.
|
|
config NFT_FWD_NETDEV
|
tristate "Netfilter nf_tables netdev packet forwarding support"
|
select NF_DUP_NETDEV
|
help
|
This option enables packet forwarding for the "netdev" family.
|
|
config NFT_FIB_NETDEV
|
depends on NFT_FIB_IPV4
|
depends on NFT_FIB_IPV6
|
tristate "Netfilter nf_tables netdev fib lookups support"
|
help
|
This option allows using the FIB expression from the netdev table.
|
The lookup will be delegated to the IPv4 or IPv6 FIB depending
|
on the protocol of the packet.
|
|
endif # NF_TABLES_NETDEV
|
|
endif # NF_TABLES
|
|
config NF_FLOW_TABLE_INET
|
tristate "Netfilter flow table mixed IPv4/IPv6 module"
|
depends on NF_FLOW_TABLE
|
help
|
This option adds the flow table mixed IPv4/IPv6 support.
|
|
To compile it as a module, choose M here.
|
|
config NF_FLOW_TABLE
|
tristate "Netfilter flow table module"
|
depends on NETFILTER_INGRESS
|
depends on NF_CONNTRACK
|
depends on NF_TABLES
|
help
|
This option adds the flow table core infrastructure.
|
|
To compile it as a module, choose M here.
|
|
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 allows you to match packets based on the
|
"nfmark" value in the packet.
|
The target allows you to create rules in the "mangle" table which alter
|
the netfilter mark (nfmark) field associated with the packet.
|
|
Prior to routing, the nfmark can influence the routing method and can
|
also be used by other subsystems to change their behavior.
|
|
config NETFILTER_XT_CONNMARK
|
tristate 'ctmark target and match support'
|
depends on NF_CONNTRACK
|
depends on NETFILTER_ADVANCED
|
select NF_CONNTRACK_MARK
|
help
|
This option adds the "CONNMARK" target and "connmark" match.
|
|
Netfilter allows you to store a mark value per connection (a.k.a.
|
ctmark), similarly to the packet mark (nfmark). Using this
|
target and match, you can set and match on this mark.
|
|
config NETFILTER_XT_SET
|
tristate 'set target and match support'
|
depends on IP_SET
|
depends on NETFILTER_ADVANCED
|
help
|
This option adds the "SET" target and "set" match.
|
|
Using this target and match, you can add/delete and match
|
elements in the sets created by ipset(8).
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
# alphabetically ordered list of targets
|
|
comment "Xtables targets"
|
|
config NETFILTER_XT_TARGET_AUDIT
|
tristate "AUDIT target support"
|
depends on AUDIT
|
depends on NETFILTER_ADVANCED
|
help
|
This option adds a 'AUDIT' target, which can be used to create
|
audit records for packets dropped/accepted.
|
|
To compileit as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_TARGET_CHECKSUM
|
tristate "CHECKSUM target support"
|
depends on IP_NF_MANGLE || IP6_NF_MANGLE
|
depends on NETFILTER_ADVANCED
|
help
|
This option adds a `CHECKSUM' target, which can be used in the iptables mangle
|
table to work around buggy DHCP clients in virtualized environments.
|
|
Some old DHCP clients drop packets because they are not aware
|
that the checksum would normally be offloaded to hardware and
|
thus should be considered valid.
|
This target can be used to fill in the checksum using iptables
|
when such packets are sent via a virtual network device.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_TARGET_CLASSIFY
|
tristate '"CLASSIFY" target support'
|
depends on NETFILTER_ADVANCED
|
help
|
This option adds a `CLASSIFY' target, which enables the user to set
|
the priority of a packet. Some qdiscs can use this value for
|
classification, among these are:
|
|
atm, cbq, dsmark, pfifo_fast, htb, prio
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_TARGET_CONNMARK
|
tristate '"CONNMARK" target 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_TARGET_CONNSECMARK
|
tristate '"CONNSECMARK" target support'
|
depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
|
default m if NETFILTER_ADVANCED=n
|
help
|
The CONNSECMARK target copies security markings from packets
|
to connections, and restores security markings from connections
|
to packets (if the packets are not already marked). This would
|
normally be used in conjunction with the SECMARK target.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_TARGET_CT
|
tristate '"CT" target support'
|
depends on NF_CONNTRACK
|
depends on IP_NF_RAW || IP6_NF_RAW
|
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
|
the helper to be used.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_TARGET_DSCP
|
tristate '"DSCP" and "TOS" target support'
|
depends on IP_NF_MANGLE || IP6_NF_MANGLE
|
depends on NETFILTER_ADVANCED
|
help
|
This option adds a `DSCP' target, which allows you to manipulate
|
the IPv4/IPv6 header DSCP field (differentiated services codepoint).
|
|
The DSCP field can have any value between 0x0 and 0x3f inclusive.
|
|
It also adds the "TOS" target, which allows you to create rules in
|
the "mangle" table which alter the Type Of Service field of an IPv4
|
or the Priority field of an IPv6 packet, prior to routing.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_TARGET_HL
|
tristate '"HL" hoplimit target support'
|
depends on IP_NF_MANGLE || IP6_NF_MANGLE
|
depends on NETFILTER_ADVANCED
|
help
|
This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
|
targets, which enable the user to change the
|
hoplimit/time-to-live value of the IP header.
|
|
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_HMARK
|
tristate '"HMARK" target support'
|
depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
|
depends on NETFILTER_ADVANCED
|
help
|
This option adds the "HMARK" target.
|
|
The target allows you to create rules in the "raw" and "mangle" tables
|
which set the skbuff mark by means of hash calculation within a given
|
range. The nfmark can influence the routing method and can also be used
|
by other subsystems to change their behaviour.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
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.rst
|
|
config NETFILTER_XT_TARGET_LOG
|
tristate "LOG target support"
|
select NF_LOG_COMMON
|
select NF_LOG_IPV4
|
select NF_LOG_IPV6 if IP6_NF_IPTABLES
|
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_NAT
|
tristate '"SNAT and DNAT" targets support'
|
depends on NF_NAT
|
help
|
This option enables the SNAT and DNAT targets.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_TARGET_NETMAP
|
tristate '"NETMAP" target support'
|
depends on NF_NAT
|
help
|
NETMAP is an implementation of static 1:1 NAT mapping of network
|
addresses. It maps the network address part, while keeping the host
|
address part intact.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
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 (DEPRECATED)'
|
depends on NF_CONNTRACK
|
depends on IP_NF_RAW || IP6_NF_RAW
|
depends on NETFILTER_ADVANCED
|
select NETFILTER_XT_TARGET_CT
|
|
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_REDIRECT
|
tristate "REDIRECT target support"
|
depends on NF_NAT
|
select NF_NAT_REDIRECT
|
help
|
REDIRECT is a special case of NAT: all incoming connections are
|
mapped onto the incoming interface's address, causing the packets to
|
come to the local machine instead of passing through. This is
|
useful for transparent proxies.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_TARGET_MASQUERADE
|
tristate "MASQUERADE target support"
|
depends on NF_NAT
|
default m if NETFILTER_ADVANCED=n
|
select NF_NAT_MASQUERADE
|
help
|
Masquerading is a special case of NAT: all outgoing connections are
|
changed to seem to come from a particular interface's address, and
|
if the interface goes down, those connections are lost. This is
|
only useful for dialup accounts with dynamic IP address (ie. your IP
|
address will be different on next dialup).
|
|
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
|
depends on IP6_NF_IPTABLES || !IP6_NF_IPTABLES
|
select NF_DUP_IPV4
|
select NF_DUP_IPV6 if IP6_NF_IPTABLES
|
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 transparent proxying support'
|
depends on NETFILTER_XTABLES
|
depends on NETFILTER_ADVANCED
|
depends on IPV6 || IPV6=n
|
depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
|
depends on IP_NF_MANGLE
|
select NF_DEFRAG_IPV4
|
select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES != n
|
select NF_TPROXY_IPV4
|
select NF_TPROXY_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.
|
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.rst.
|
|
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.rst>. 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'
|
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'
|
default m if NETFILTER_ADVANCED=n
|
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.rst>. If unsure, say `N'.
|
|
config NETFILTER_XT_MATCH_BPF
|
tristate '"bpf" match support'
|
depends on NETFILTER_ADVANCED
|
help
|
BPF matching applies a linux socket filter to each packet and
|
accepts those for which the filter returns non-zero.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
config NETFILTER_XT_MATCH_CGROUP
|
tristate '"control group" match support'
|
depends on NETFILTER_ADVANCED
|
depends on CGROUPS
|
select CGROUP_NET_CLASSID
|
help
|
Socket/process control group matching allows you to match locally
|
generated packets based on which net_cls control group processes
|
belong to.
|
|
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.rst>. 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.rst>. If unsure, say `N'.
|
|
config NETFILTER_XT_MATCH_CONNLABEL
|
tristate '"connlabel" match support'
|
select NF_CONNTRACK_LABELS
|
depends on NF_CONNTRACK
|
depends on NETFILTER_ADVANCED
|
help
|
This match allows you to test and assign userspace-defined labels names
|
to a connection. The kernel only stores bit values - mapping
|
names to bits is done by userspace.
|
|
Unlike connmark, more than 32 flag bits may be assigned to a
|
connection simultaneously.
|
|
config NETFILTER_XT_MATCH_CONNLIMIT
|
tristate '"connlimit" match support'
|
depends on NF_CONNTRACK
|
depends on NETFILTER_ADVANCED
|
select NETFILTER_CONNCOUNT
|
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.rst>. 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. nf_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_IPCOMP
|
tristate '"ipcomp" match support'
|
depends on NETFILTER_ADVANCED
|
help
|
This match extension allows you to match a range of CPIs(16 bits)
|
inside IPComp header of IPSec packets.
|
|
To compile it as a module, choose M here. If unsure, say N.
|
|
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_L2TP
|
tristate '"l2tp" match support'
|
depends on NETFILTER_ADVANCED
|
default L2TP
|
help
|
This option adds an "L2TP" match, which allows you to match against
|
L2TP protocol header fields.
|
|
To compile it as a module, choose M here. 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
|
select NETFILTER_NETLINK_OSF
|
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.rst>. If unsure, say `N'.
|
|
config NETFILTER_XT_MATCH_QUOTA2
|
tristate '"quota2" match support'
|
depends on NETFILTER_ADVANCED
|
help
|
This option adds a `quota2' match, which allows to match on a
|
byte counter correctly and not per CPU.
|
It allows naming the quotas.
|
This is based on http://xtables-addons.git.sourceforge.net
|
|
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_QUOTA2_LOG
|
bool '"quota2" Netfilter LOG support'
|
depends on NETFILTER_XT_MATCH_QUOTA2
|
default n
|
help
|
This option allows `quota2' to log ONCE when a quota limit
|
is passed. It logs via NETLINK using the NETLINK_NFLOG family.
|
It logs similarly to how ipt_ULOG would without data.
|
|
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.rst>. 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'
|
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.rst>. If unsure, say `N'.
|
|
config NETFILTER_XT_MATCH_SOCKET
|
tristate '"socket" match support'
|
depends on NETFILTER_XTABLES
|
depends on NETFILTER_ADVANCED
|
depends on IPV6 || IPV6=n
|
depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
|
select NF_SOCKET_IPV4
|
select NF_SOCKET_IPV6 if IP6_NF_IPTABLES
|
select NF_DEFRAG_IPV4
|
select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES != n
|
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"
|
