1 # SPDX-License-Identifier: GPL-2.0-only
2 menu "Core Netfilter Configuration"
3 depends on NET && INET && NETFILTER
5 config NETFILTER_INGRESS
6 bool "Netfilter ingress support"
10 This allows you to classify packets from ingress using the Netfilter
13 config NETFILTER_NETLINK
16 config NETFILTER_FAMILY_BRIDGE
19 config NETFILTER_FAMILY_ARP
22 config NETFILTER_NETLINK_ACCT
23 tristate "Netfilter NFACCT over NFNETLINK interface"
24 depends on NETFILTER_ADVANCED
25 select NETFILTER_NETLINK
27 If this option is enabled, the kernel will include support
28 for extended accounting via NFNETLINK.
30 config NETFILTER_NETLINK_QUEUE
31 tristate "Netfilter NFQUEUE over NFNETLINK interface"
32 depends on NETFILTER_ADVANCED
33 select NETFILTER_NETLINK
35 If this option is enabled, the kernel will include support
36 for queueing packets via NFNETLINK.
38 config NETFILTER_NETLINK_LOG
39 tristate "Netfilter LOG over NFNETLINK interface"
40 default m if NETFILTER_ADVANCED=n
41 select NETFILTER_NETLINK
43 If this option is enabled, the kernel will include support
44 for logging packets via NFNETLINK.
46 This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
47 and is also scheduled to replace the old syslog-based ipt_LOG
50 config NETFILTER_NETLINK_OSF
51 tristate "Netfilter OSF over NFNETLINK interface"
52 depends on NETFILTER_ADVANCED
53 select NETFILTER_NETLINK
55 If this option is enabled, the kernel will include support
56 for passive OS fingerprint via NFNETLINK.
59 tristate "Netfilter connection tracking support"
60 default m if NETFILTER_ADVANCED=n
62 select NF_DEFRAG_IPV6 if IPV6 != n
64 Connection tracking keeps a record of what packets have passed
65 through your machine, in order to figure out how they are related
68 This is required to do Masquerading or other kinds of Network
69 Address Translation. It can also be used to enhance packet
70 filtering (see `Connection state match support' below).
72 To compile it as a module, choose M here. If unsure, say N.
78 tristate "Netdev packet logging"
82 config NETFILTER_CONNCOUNT
85 config NF_CONNTRACK_MARK
86 bool 'Connection mark tracking support'
87 depends on NETFILTER_ADVANCED
89 This option enables support for connection marks, used by the
90 `CONNMARK' target and `connmark' match. Similar to the mark value
91 of packets, but this mark value is kept in the conntrack session
92 instead of the individual packets.
94 config NF_CONNTRACK_SECMARK
95 bool 'Connection tracking security mark support'
96 depends on NETWORK_SECMARK
97 default m if NETFILTER_ADVANCED=n
99 This option enables security markings to be applied to
100 connections. Typically they are copied to connections from
101 packets using the CONNSECMARK target and copied back from
102 connections to packets with the same target, with the packets
103 being originally labeled via SECMARK.
107 config NF_CONNTRACK_ZONES
108 bool 'Connection tracking zones'
109 depends on NETFILTER_ADVANCED
111 This option enables support for connection tracking zones.
112 Normally, each connection needs to have a unique system wide
113 identity. Connection tracking zones allow to have multiple
114 connections using the same identity, as long as they are
115 contained in different zones.
119 config NF_CONNTRACK_PROCFS
120 bool "Supply CT list in procfs (OBSOLETE)"
124 This option enables for the list of known conntrack entries
125 to be shown in procfs under net/netfilter/nf_conntrack. This
126 is considered obsolete in favor of using the conntrack(8)
127 tool which uses Netlink.
129 config NF_CONNTRACK_EVENTS
130 bool "Connection tracking events"
131 depends on NETFILTER_ADVANCED
133 If this option is enabled, the connection tracking code will
134 provide a notifier chain that can be used by other kernel code
135 to get notified about changes in the connection tracking state.
139 config NF_CONNTRACK_TIMEOUT
140 bool 'Connection tracking timeout'
141 depends on NETFILTER_ADVANCED
143 This option enables support for connection tracking timeout
144 extension. This allows you to attach timeout policies to flow
149 config NF_CONNTRACK_TIMESTAMP
150 bool 'Connection tracking timestamping'
151 depends on NETFILTER_ADVANCED
153 This option enables support for connection tracking timestamping.
154 This allows you to store the flow start-time and to obtain
155 the flow-stop time (once it has been destroyed) via Connection
160 config NF_CONNTRACK_LABELS
161 bool "Connection tracking labels"
163 This option enables support for assigning user-defined flag bits
164 to connection tracking entries. It can be used with xtables connlabel
165 match and the nftables ct expression.
167 config NF_CT_PROTO_DCCP
168 bool 'DCCP protocol connection tracking support'
169 depends on NETFILTER_ADVANCED
172 With this option enabled, the layer 3 independent connection
173 tracking code will be able to do state tracking on DCCP connections.
177 config NF_CT_PROTO_GRE
180 config NF_CT_PROTO_SCTP
181 bool 'SCTP protocol connection tracking support'
182 depends on NETFILTER_ADVANCED
186 With this option enabled, the layer 3 independent connection
187 tracking code will be able to do state tracking on SCTP connections.
191 config NF_CT_PROTO_UDPLITE
192 bool 'UDP-Lite protocol connection tracking support'
193 depends on NETFILTER_ADVANCED
196 With this option enabled, the layer 3 independent connection
197 tracking code will be able to do state tracking on UDP-Lite
202 config NF_CONNTRACK_AMANDA
203 tristate "Amanda backup protocol support"
204 depends on NETFILTER_ADVANCED
206 select TEXTSEARCH_KMP
208 If you are running the Amanda backup package <http://www.amanda.org/>
209 on this machine or machines that will be MASQUERADED through this
210 machine, then you may want to enable this feature. This allows the
211 connection tracking and natting code to allow the sub-channels that
212 Amanda requires for communication of the backup data, messages and
215 To compile it as a module, choose M here. If unsure, say N.
217 config NF_CONNTRACK_FTP
218 tristate "FTP protocol support"
219 default m if NETFILTER_ADVANCED=n
221 Tracking FTP connections is problematic: special helpers are
222 required for tracking them, and doing masquerading and other forms
223 of Network Address Translation on them.
225 This is FTP support on Layer 3 independent connection tracking.
226 Layer 3 independent connection tracking is experimental scheme
227 which generalize ip_conntrack to support other layer 3 protocols.
229 To compile it as a module, choose M here. If unsure, say N.
231 config NF_CONNTRACK_H323
232 tristate "H.323 protocol support"
233 depends on IPV6 || IPV6=n
234 depends on NETFILTER_ADVANCED
236 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
237 important VoIP protocols, it is widely used by voice hardware and
238 software including voice gateways, IP phones, Netmeeting, OpenPhone,
241 With this module you can support H.323 on a connection tracking/NAT
244 This module supports RAS, Fast Start, H.245 Tunnelling, Call
245 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
246 whiteboard, file transfer, etc. For more information, please
247 visit http://nath323.sourceforge.net/.
249 To compile it as a module, choose M here. If unsure, say N.
251 config NF_CONNTRACK_IRC
252 tristate "IRC protocol support"
253 default m if NETFILTER_ADVANCED=n
255 There is a commonly-used extension to IRC called
256 Direct Client-to-Client Protocol (DCC). This enables users to send
257 files to each other, and also chat to each other without the need
258 of a server. DCC Sending is used anywhere you send files over IRC,
259 and DCC Chat is most commonly used by Eggdrop bots. If you are
260 using NAT, this extension will enable you to send files and initiate
261 chats. Note that you do NOT need this extension to get files or
262 have others initiate chats, or everything else in IRC.
264 To compile it as a module, choose M here. If unsure, say N.
266 config NF_CONNTRACK_BROADCAST
269 config NF_CONNTRACK_NETBIOS_NS
270 tristate "NetBIOS name service protocol support"
271 select NF_CONNTRACK_BROADCAST
273 NetBIOS name service requests are sent as broadcast messages from an
274 unprivileged port and responded to with unicast messages to the
275 same port. This make them hard to firewall properly because connection
276 tracking doesn't deal with broadcasts. This helper tracks locally
277 originating NetBIOS name service requests and the corresponding
278 responses. It relies on correct IP address configuration, specifically
279 netmask and broadcast address. When properly configured, the output
280 of "ip address show" should look similar to this:
282 $ ip -4 address show eth0
283 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
284 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
286 To compile it as a module, choose M here. If unsure, say N.
288 config NF_CONNTRACK_SNMP
289 tristate "SNMP service protocol support"
290 depends on NETFILTER_ADVANCED
291 select NF_CONNTRACK_BROADCAST
293 SNMP service requests are sent as broadcast messages from an
294 unprivileged port and responded to with unicast messages to the
295 same port. This make them hard to firewall properly because connection
296 tracking doesn't deal with broadcasts. This helper tracks locally
297 originating SNMP service requests and the corresponding
298 responses. It relies on correct IP address configuration, specifically
299 netmask and broadcast address.
301 To compile it as a module, choose M here. If unsure, say N.
303 config NF_CONNTRACK_PPTP
304 tristate "PPtP protocol support"
305 depends on NETFILTER_ADVANCED
306 select NF_CT_PROTO_GRE
308 This module adds support for PPTP (Point to Point Tunnelling
309 Protocol, RFC2637) connection tracking and NAT.
311 If you are running PPTP sessions over a stateful firewall or NAT
312 box, you may want to enable this feature.
314 Please note that not all PPTP modes of operation are supported yet.
315 Specifically these limitations exist:
316 - Blindly assumes that control connections are always established
317 in PNS->PAC direction. This is a violation of RFC2637.
318 - Only supports a single call within each session
320 To compile it as a module, choose M here. If unsure, say N.
322 config NF_CONNTRACK_SANE
323 tristate "SANE protocol support"
324 depends on NETFILTER_ADVANCED
326 SANE is a protocol for remote access to scanners as implemented
327 by the 'saned' daemon. Like FTP, it uses separate control and
330 With this module you can support SANE on a connection tracking
333 To compile it as a module, choose M here. If unsure, say N.
335 config NF_CONNTRACK_SIP
336 tristate "SIP protocol support"
337 default m if NETFILTER_ADVANCED=n
339 SIP is an application-layer control protocol that can establish,
340 modify, and terminate multimedia sessions (conferences) such as
341 Internet telephony calls. With the ip_conntrack_sip and
342 the nf_nat_sip modules you can support the protocol on a connection
343 tracking/NATing firewall.
345 To compile it as a module, choose M here. If unsure, say N.
347 config NF_CONNTRACK_TFTP
348 tristate "TFTP protocol support"
349 depends on NETFILTER_ADVANCED
351 TFTP connection tracking helper, this is required depending
352 on how restrictive your ruleset is.
353 If you are using a tftp client behind -j SNAT or -j MASQUERADING
356 To compile it as a module, choose M here. If unsure, say N.
359 tristate 'Connection tracking netlink interface'
360 select NETFILTER_NETLINK
361 default m if NETFILTER_ADVANCED=n
363 This option enables support for a netlink-based userspace interface
365 config NF_CT_NETLINK_TIMEOUT
366 tristate 'Connection tracking timeout tuning via Netlink'
367 select NETFILTER_NETLINK
368 depends on NETFILTER_ADVANCED
369 depends on NF_CONNTRACK_TIMEOUT
371 This option enables support for connection tracking timeout
372 fine-grain tuning. This allows you to attach specific timeout
373 policies to flows, instead of using the global timeout policy.
377 config NF_CT_NETLINK_HELPER
378 tristate 'Connection tracking helpers in user-space via Netlink'
379 select NETFILTER_NETLINK
380 depends on NF_CT_NETLINK
381 depends on NETFILTER_NETLINK_QUEUE
382 depends on NETFILTER_NETLINK_GLUE_CT
383 depends on NETFILTER_ADVANCED
385 This option enables the user-space connection tracking helpers
390 config NETFILTER_NETLINK_GLUE_CT
391 bool "NFQUEUE and NFLOG integration with Connection Tracking"
393 depends on (NETFILTER_NETLINK_QUEUE || NETFILTER_NETLINK_LOG) && NF_CT_NETLINK
395 If this option is enabled, NFQUEUE and NFLOG can include
396 Connection Tracking information together with the packet is
397 the enqueued via NFNETLINK.
400 tristate "Network Address Translation support"
401 depends on NF_CONNTRACK
402 default m if NETFILTER_ADVANCED=n
404 The NAT option allows masquerading, port forwarding and other
405 forms of full Network Address Port Translation. This can be
406 controlled by iptables, ip6tables or nft.
410 depends on NF_CONNTRACK && NF_NAT
411 default NF_NAT && NF_CONNTRACK_AMANDA
415 depends on NF_CONNTRACK && NF_NAT
416 default NF_NAT && NF_CONNTRACK_FTP
420 depends on NF_CONNTRACK && NF_NAT
421 default NF_NAT && NF_CONNTRACK_IRC
425 depends on NF_CONNTRACK && NF_NAT
426 default NF_NAT && NF_CONNTRACK_SIP
430 depends on NF_CONNTRACK && NF_NAT
431 default NF_NAT && NF_CONNTRACK_TFTP
433 config NF_NAT_REDIRECT
436 config NF_NAT_MASQUERADE
439 config NETFILTER_SYNPROXY
445 select NETFILTER_NETLINK
446 tristate "Netfilter nf_tables support"
448 nftables is the new packet classification framework that intends to
449 replace the existing {ip,ip6,arp,eb}_tables infrastructure. It
450 provides a pseudo-state machine with an extensible instruction-set
451 (also known as expressions) that the userspace 'nft' utility
452 (http://www.netfilter.org/projects/nftables) uses to build the
453 rule-set. It also comes with the generic set infrastructure that
454 allows you to construct mappings between matchings and actions
455 for performance lookups.
457 To compile it as a module, choose M here.
462 tristate "Netfilter nf_tables set infrastructure"
464 This option enables the nf_tables set infrastructure that allows to
465 look up for elements in a set and to build one-way mappings between
466 matchings and actions.
468 config NF_TABLES_INET
470 select NF_TABLES_IPV4
471 select NF_TABLES_IPV6
472 bool "Netfilter nf_tables mixed IPv4/IPv6 tables support"
474 This option enables support for a mixed IPv4/IPv6 "inet" table.
476 config NF_TABLES_NETDEV
477 bool "Netfilter nf_tables netdev tables support"
479 This option enables support for the "netdev" table.
482 tristate "Netfilter nf_tables number generator module"
484 This option adds the number generator expression used to perform
485 incremental counting and random numbers bound to a upper limit.
488 depends on NF_CONNTRACK
489 tristate "Netfilter nf_tables conntrack module"
491 This option adds the "ct" expression that you can use to match
492 connection tracking information such as the flow state.
494 config NFT_FLOW_OFFLOAD
495 depends on NF_CONNTRACK && NF_FLOW_TABLE
496 tristate "Netfilter nf_tables hardware flow offload module"
498 This option adds the "flow_offload" expression that you can use to
499 choose what flows are placed into the hardware.
502 tristate "Netfilter nf_tables counter module"
504 This option adds the "counter" expression that you can use to
505 include packet and byte counters in a rule.
508 tristate "Netfilter nf_tables connlimit module"
509 depends on NF_CONNTRACK
510 depends on NETFILTER_ADVANCED
511 select NETFILTER_CONNCOUNT
513 This option adds the "connlimit" expression that you can use to
514 ratelimit rule matchings per connections.
517 tristate "Netfilter nf_tables log module"
519 This option adds the "log" expression that you can use to log
520 packets matching some criteria.
523 tristate "Netfilter nf_tables limit module"
525 This option adds the "limit" expression that you can use to
526 ratelimit rule matchings.
529 depends on NF_CONNTRACK
531 select NF_NAT_MASQUERADE
532 tristate "Netfilter nf_tables masquerade support"
534 This option adds the "masquerade" expression that you can use
535 to perform NAT in the masquerade flavour.
538 depends on NF_CONNTRACK
540 tristate "Netfilter nf_tables redirect support"
541 select NF_NAT_REDIRECT
543 This options adds the "redirect" expression that you can use
544 to perform NAT in the redirect flavour.
547 depends on NF_CONNTRACK
549 depends on NF_TABLES_IPV4 || NF_TABLES_IPV6
550 tristate "Netfilter nf_tables nat module"
552 This option adds the "nat" expression that you can use to perform
553 typical Network Address Translation (NAT) packet transformations.
556 tristate "Netfilter nf_tables tunnel module"
558 This option adds the "tunnel" expression that you can use to set
562 tristate "Netfilter nf_tables stateful object reference module"
564 This option adds the "objref" expression that allows you to refer to
565 stateful objects, such as counters and quotas.
568 depends on NETFILTER_NETLINK_QUEUE
569 tristate "Netfilter nf_tables queue module"
571 This is required if you intend to use the userspace queueing
572 infrastructure (also known as NFQUEUE) from nftables.
575 tristate "Netfilter nf_tables quota module"
577 This option adds the "quota" expression that you can use to match
578 enforce bytes quotas.
581 default m if NETFILTER_ADVANCED=n
582 tristate "Netfilter nf_tables reject support"
583 depends on !NF_TABLES_INET || (IPV6!=m || m)
585 This option adds the "reject" expression that you can use to
586 explicitly deny and notify via TCP reset/ICMP informational errors
589 config NFT_REJECT_INET
590 depends on NF_TABLES_INET
595 depends on NETFILTER_XTABLES
596 tristate "Netfilter x_tables over nf_tables module"
598 This is required if you intend to use any of existing
599 x_tables match/target extensions over the nf_tables
603 tristate "Netfilter nf_tables hash module"
605 This option adds the "hash" expression that you can use to perform
606 a hash operation on registers.
612 depends on NF_TABLES_INET
613 depends on NFT_FIB_IPV4
614 depends on NFT_FIB_IPV6
615 tristate "Netfilter nf_tables fib inet support"
617 This option allows using the FIB expression from the inet table.
618 The lookup will be delegated to the IPv4 or IPv6 FIB depending
619 on the protocol of the packet.
622 tristate "Netfilter nf_tables xfrm/IPSec security association matching"
625 This option adds an expression that you can use to extract properties
626 of a packets security association.
629 tristate "Netfilter nf_tables socket match support"
630 depends on IPV6 || IPV6=n
631 select NF_SOCKET_IPV4
632 select NF_SOCKET_IPV6 if NF_TABLES_IPV6
634 This option allows matching for the presence or absence of a
635 corresponding socket and its attributes.
638 tristate "Netfilter nf_tables passive OS fingerprint support"
639 depends on NETFILTER_ADVANCED
640 select NETFILTER_NETLINK_OSF
642 This option allows matching packets from an specific OS.
645 tristate "Netfilter nf_tables tproxy support"
646 depends on IPV6 || IPV6=n
647 select NF_DEFRAG_IPV4
648 select NF_DEFRAG_IPV6 if NF_TABLES_IPV6
649 select NF_TPROXY_IPV4
650 select NF_TPROXY_IPV6 if NF_TABLES_IPV6
652 This makes transparent proxy support available in nftables.
657 tristate "Netfilter packet duplication support"
659 This option enables the generic packet duplication infrastructure
662 config NFT_DUP_NETDEV
663 tristate "Netfilter nf_tables netdev packet duplication support"
666 This option enables packet duplication for the "netdev" family.
668 config NFT_FWD_NETDEV
669 tristate "Netfilter nf_tables netdev packet forwarding support"
672 This option enables packet forwarding for the "netdev" family.
674 config NFT_FIB_NETDEV
675 depends on NFT_FIB_IPV4
676 depends on NFT_FIB_IPV6
677 tristate "Netfilter nf_tables netdev fib lookups support"
679 This option allows using the FIB expression from the netdev table.
680 The lookup will be delegated to the IPv4 or IPv6 FIB depending
681 on the protocol of the packet.
683 endif # NF_TABLES_NETDEV
687 config NF_FLOW_TABLE_INET
688 tristate "Netfilter flow table mixed IPv4/IPv6 module"
689 depends on NF_FLOW_TABLE
691 This option adds the flow table mixed IPv4/IPv6 support.
693 To compile it as a module, choose M here.
696 tristate "Netfilter flow table module"
697 depends on NETFILTER_INGRESS
698 depends on NF_CONNTRACK
701 This option adds the flow table core infrastructure.
703 To compile it as a module, choose M here.
705 config NETFILTER_XTABLES
706 tristate "Netfilter Xtables support (required for ip_tables)"
707 default m if NETFILTER_ADVANCED=n
709 This is required if you intend to use any of ip_tables,
710 ip6_tables or arp_tables.
714 comment "Xtables combined modules"
716 config NETFILTER_XT_MARK
717 tristate 'nfmark target and match support'
718 default m if NETFILTER_ADVANCED=n
720 This option adds the "MARK" target and "mark" match.
722 Netfilter mark matching allows you to match packets based on the
723 "nfmark" value in the packet.
724 The target allows you to create rules in the "mangle" table which alter
725 the netfilter mark (nfmark) field associated with the packet.
727 Prior to routing, the nfmark can influence the routing method and can
728 also be used by other subsystems to change their behavior.
730 config NETFILTER_XT_CONNMARK
731 tristate 'ctmark target and match support'
732 depends on NF_CONNTRACK
733 depends on NETFILTER_ADVANCED
734 select NF_CONNTRACK_MARK
736 This option adds the "CONNMARK" target and "connmark" match.
738 Netfilter allows you to store a mark value per connection (a.k.a.
739 ctmark), similarly to the packet mark (nfmark). Using this
740 target and match, you can set and match on this mark.
742 config NETFILTER_XT_SET
743 tristate 'set target and match support'
745 depends on NETFILTER_ADVANCED
747 This option adds the "SET" target and "set" match.
749 Using this target and match, you can add/delete and match
750 elements in the sets created by ipset(8).
752 To compile it as a module, choose M here. If unsure, say N.
754 # alphabetically ordered list of targets
756 comment "Xtables targets"
758 config NETFILTER_XT_TARGET_AUDIT
759 tristate "AUDIT target support"
761 depends on NETFILTER_ADVANCED
763 This option adds a 'AUDIT' target, which can be used to create
764 audit records for packets dropped/accepted.
766 To compileit as a module, choose M here. If unsure, say N.
768 config NETFILTER_XT_TARGET_CHECKSUM
769 tristate "CHECKSUM target support"
770 depends on IP_NF_MANGLE || IP6_NF_MANGLE
771 depends on NETFILTER_ADVANCED
773 This option adds a `CHECKSUM' target, which can be used in the iptables mangle
774 table to work around buggy DHCP clients in virtualized environments.
776 Some old DHCP clients drop packets because they are not aware
777 that the checksum would normally be offloaded to hardware and
778 thus should be considered valid.
779 This target can be used to fill in the checksum using iptables
780 when such packets are sent via a virtual network device.
782 To compile it as a module, choose M here. If unsure, say N.
784 config NETFILTER_XT_TARGET_CLASSIFY
785 tristate '"CLASSIFY" target support'
786 depends on NETFILTER_ADVANCED
788 This option adds a `CLASSIFY' target, which enables the user to set
789 the priority of a packet. Some qdiscs can use this value for
790 classification, among these are:
792 atm, cbq, dsmark, pfifo_fast, htb, prio
794 To compile it as a module, choose M here. If unsure, say N.
796 config NETFILTER_XT_TARGET_CONNMARK
797 tristate '"CONNMARK" target support'
798 depends on NF_CONNTRACK
799 depends on NETFILTER_ADVANCED
800 select NETFILTER_XT_CONNMARK
802 This is a backwards-compat option for the user's convenience
803 (e.g. when running oldconfig). It selects
804 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
806 config NETFILTER_XT_TARGET_CONNSECMARK
807 tristate '"CONNSECMARK" target support'
808 depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
809 default m if NETFILTER_ADVANCED=n
811 The CONNSECMARK target copies security markings from packets
812 to connections, and restores security markings from connections
813 to packets (if the packets are not already marked). This would
814 normally be used in conjunction with the SECMARK target.
816 To compile it as a module, choose M here. If unsure, say N.
818 config NETFILTER_XT_TARGET_CT
819 tristate '"CT" target support'
820 depends on NF_CONNTRACK
821 depends on IP_NF_RAW || IP6_NF_RAW
822 depends on NETFILTER_ADVANCED
824 This options adds a `CT' target, which allows to specify initial
825 connection tracking parameters like events to be delivered and
826 the helper to be used.
828 To compile it as a module, choose M here. If unsure, say N.
830 config NETFILTER_XT_TARGET_DSCP
831 tristate '"DSCP" and "TOS" target support'
832 depends on IP_NF_MANGLE || IP6_NF_MANGLE
833 depends on NETFILTER_ADVANCED
835 This option adds a `DSCP' target, which allows you to manipulate
836 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
838 The DSCP field can have any value between 0x0 and 0x3f inclusive.
840 It also adds the "TOS" target, which allows you to create rules in
841 the "mangle" table which alter the Type Of Service field of an IPv4
842 or the Priority field of an IPv6 packet, prior to routing.
844 To compile it as a module, choose M here. If unsure, say N.
846 config NETFILTER_XT_TARGET_HL
847 tristate '"HL" hoplimit target support'
848 depends on IP_NF_MANGLE || IP6_NF_MANGLE
849 depends on NETFILTER_ADVANCED
851 This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
852 targets, which enable the user to change the
853 hoplimit/time-to-live value of the IP header.
855 While it is safe to decrement the hoplimit/TTL value, the
856 modules also allow to increment and set the hoplimit value of
857 the header to arbitrary values. This is EXTREMELY DANGEROUS
858 since you can easily create immortal packets that loop
859 forever on the network.
861 config NETFILTER_XT_TARGET_HMARK
862 tristate '"HMARK" target support'
863 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
864 depends on NETFILTER_ADVANCED
866 This option adds the "HMARK" target.
868 The target allows you to create rules in the "raw" and "mangle" tables
869 which set the skbuff mark by means of hash calculation within a given
870 range. The nfmark can influence the routing method and can also be used
871 by other subsystems to change their behaviour.
873 To compile it as a module, choose M here. If unsure, say N.
875 config NETFILTER_XT_TARGET_IDLETIMER
876 tristate "IDLETIMER target support"
877 depends on NETFILTER_ADVANCED
880 This option adds the `IDLETIMER' target. Each matching packet
881 resets the timer associated with label specified when the rule is
882 added. When the timer expires, it triggers a sysfs notification.
883 The remaining time for expiration can be read via sysfs.
885 To compile it as a module, choose M here. If unsure, say N.
887 config NETFILTER_XT_TARGET_LED
888 tristate '"LED" target support'
889 depends on LEDS_CLASS && LEDS_TRIGGERS
890 depends on NETFILTER_ADVANCED
892 This option adds a `LED' target, which allows you to blink LEDs in
893 response to particular packets passing through your machine.
895 This can be used to turn a spare LED into a network activity LED,
896 which only flashes in response to FTP transfers, for example. Or
897 you could have an LED which lights up for a minute or two every time
898 somebody connects to your machine via SSH.
900 You will need support for the "led" class to make this work.
902 To create an LED trigger for incoming SSH traffic:
903 iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
905 Then attach the new trigger to an LED on your system:
906 echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
908 For more information on the LEDs available on your system, see
909 Documentation/leds/leds-class.txt
911 config NETFILTER_XT_TARGET_LOG
912 tristate "LOG target support"
915 select NF_LOG_IPV6 if IP6_NF_IPTABLES
916 default m if NETFILTER_ADVANCED=n
918 This option adds a `LOG' target, which allows you to create rules in
919 any iptables table which records the packet header to the syslog.
921 To compile it as a module, choose M here. If unsure, say N.
923 config NETFILTER_XT_TARGET_MARK
924 tristate '"MARK" target support'
925 depends on NETFILTER_ADVANCED
926 select NETFILTER_XT_MARK
928 This is a backwards-compat option for the user's convenience
929 (e.g. when running oldconfig). It selects
930 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
932 config NETFILTER_XT_NAT
933 tristate '"SNAT and DNAT" targets support'
936 This option enables the SNAT and DNAT targets.
938 To compile it as a module, choose M here. If unsure, say N.
940 config NETFILTER_XT_TARGET_NETMAP
941 tristate '"NETMAP" target support'
944 NETMAP is an implementation of static 1:1 NAT mapping of network
945 addresses. It maps the network address part, while keeping the host
948 To compile it as a module, choose M here. If unsure, say N.
950 config NETFILTER_XT_TARGET_NFLOG
951 tristate '"NFLOG" target support'
952 default m if NETFILTER_ADVANCED=n
953 select NETFILTER_NETLINK_LOG
955 This option enables the NFLOG target, which allows to LOG
956 messages through nfnetlink_log.
958 To compile it as a module, choose M here. If unsure, say N.
960 config NETFILTER_XT_TARGET_NFQUEUE
961 tristate '"NFQUEUE" target Support'
962 depends on NETFILTER_ADVANCED
963 select NETFILTER_NETLINK_QUEUE
965 This target replaced the old obsolete QUEUE target.
967 As opposed to QUEUE, it supports 65535 different queues,
970 To compile it as a module, choose M here. If unsure, say N.
972 config NETFILTER_XT_TARGET_NOTRACK
973 tristate '"NOTRACK" target support (DEPRECATED)'
974 depends on NF_CONNTRACK
975 depends on IP_NF_RAW || IP6_NF_RAW
976 depends on NETFILTER_ADVANCED
977 select NETFILTER_XT_TARGET_CT
979 config NETFILTER_XT_TARGET_RATEEST
980 tristate '"RATEEST" target support'
981 depends on NETFILTER_ADVANCED
983 This option adds a `RATEEST' target, which allows to measure
984 rates similar to TC estimators. The `rateest' match can be
985 used to match on the measured rates.
987 To compile it as a module, choose M here. If unsure, say N.
989 config NETFILTER_XT_TARGET_REDIRECT
990 tristate "REDIRECT target support"
992 select NF_NAT_REDIRECT
994 REDIRECT is a special case of NAT: all incoming connections are
995 mapped onto the incoming interface's address, causing the packets to
996 come to the local machine instead of passing through. This is
997 useful for transparent proxies.
999 To compile it as a module, choose M here. If unsure, say N.
1001 config NETFILTER_XT_TARGET_MASQUERADE
1002 tristate "MASQUERADE target support"
1004 default m if NETFILTER_ADVANCED=n
1005 select NF_NAT_MASQUERADE
1007 Masquerading is a special case of NAT: all outgoing connections are
1008 changed to seem to come from a particular interface's address, and
1009 if the interface goes down, those connections are lost. This is
1010 only useful for dialup accounts with dynamic IP address (ie. your IP
1011 address will be different on next dialup).
1013 To compile it as a module, choose M here. If unsure, say N.
1015 config NETFILTER_XT_TARGET_TEE
1016 tristate '"TEE" - packet cloning to alternate destination'
1017 depends on NETFILTER_ADVANCED
1018 depends on IPV6 || IPV6=n
1019 depends on !NF_CONNTRACK || NF_CONNTRACK
1020 depends on IP6_NF_IPTABLES || !IP6_NF_IPTABLES
1022 select NF_DUP_IPV6 if IP6_NF_IPTABLES
1024 This option adds a "TEE" target with which a packet can be cloned and
1025 this clone be rerouted to another nexthop.
1027 config NETFILTER_XT_TARGET_TPROXY
1028 tristate '"TPROXY" target transparent proxying support'
1029 depends on NETFILTER_XTABLES
1030 depends on NETFILTER_ADVANCED
1031 depends on IPV6 || IPV6=n
1032 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1033 depends on IP_NF_MANGLE
1034 select NF_DEFRAG_IPV4
1035 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES != n
1036 select NF_TPROXY_IPV4
1037 select NF_TPROXY_IPV6 if IP6_NF_IPTABLES
1039 This option adds a `TPROXY' target, which is somewhat similar to
1040 REDIRECT. It can only be used in the mangle table and is useful
1041 to redirect traffic to a transparent proxy. It does _not_ depend
1042 on Netfilter connection tracking and NAT, unlike REDIRECT.
1043 For it to work you will have to configure certain iptables rules
1044 and use policy routing. For more information on how to set it up
1045 see Documentation/networking/tproxy.txt.
1047 To compile it as a module, choose M here. If unsure, say N.
1049 config NETFILTER_XT_TARGET_TRACE
1050 tristate '"TRACE" target support'
1051 depends on IP_NF_RAW || IP6_NF_RAW
1052 depends on NETFILTER_ADVANCED
1054 The TRACE target allows you to mark packets so that the kernel
1055 will log every rule which match the packets as those traverse
1056 the tables, chains, rules.
1058 If you want to compile it as a module, say M here and read
1059 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1061 config NETFILTER_XT_TARGET_SECMARK
1062 tristate '"SECMARK" target support'
1063 depends on NETWORK_SECMARK
1064 default m if NETFILTER_ADVANCED=n
1066 The SECMARK target allows security marking of network
1067 packets, for use with security subsystems.
1069 To compile it as a module, choose M here. If unsure, say N.
1071 config NETFILTER_XT_TARGET_TCPMSS
1072 tristate '"TCPMSS" target support'
1073 depends on IPV6 || IPV6=n
1074 default m if NETFILTER_ADVANCED=n
1076 This option adds a `TCPMSS' target, which allows you to alter the
1077 MSS value of TCP SYN packets, to control the maximum size for that
1078 connection (usually limiting it to your outgoing interface's MTU
1081 This is used to overcome criminally braindead ISPs or servers which
1082 block ICMP Fragmentation Needed packets. The symptoms of this
1083 problem are that everything works fine from your Linux
1084 firewall/router, but machines behind it can never exchange large
1086 1) Web browsers connect, then hang with no data received.
1087 2) Small mail works fine, but large emails hang.
1088 3) ssh works fine, but scp hangs after initial handshaking.
1090 Workaround: activate this option and add a rule to your firewall
1093 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
1094 -j TCPMSS --clamp-mss-to-pmtu
1096 To compile it as a module, choose M here. If unsure, say N.
1098 config NETFILTER_XT_TARGET_TCPOPTSTRIP
1099 tristate '"TCPOPTSTRIP" target support'
1100 depends on IP_NF_MANGLE || IP6_NF_MANGLE
1101 depends on NETFILTER_ADVANCED
1103 This option adds a "TCPOPTSTRIP" target, which allows you to strip
1104 TCP options from TCP packets.
1106 # alphabetically ordered list of matches
1108 comment "Xtables matches"
1110 config NETFILTER_XT_MATCH_ADDRTYPE
1111 tristate '"addrtype" address type match support'
1112 default m if NETFILTER_ADVANCED=n
1114 This option allows you to match what routing thinks of an address,
1115 eg. UNICAST, LOCAL, BROADCAST, ...
1117 If you want to compile it as a module, say M here and read
1118 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1120 config NETFILTER_XT_MATCH_BPF
1121 tristate '"bpf" match support'
1122 depends on NETFILTER_ADVANCED
1124 BPF matching applies a linux socket filter to each packet and
1125 accepts those for which the filter returns non-zero.
1127 To compile it as a module, choose M here. If unsure, say N.
1129 config NETFILTER_XT_MATCH_CGROUP
1130 tristate '"control group" match support'
1131 depends on NETFILTER_ADVANCED
1133 select CGROUP_NET_CLASSID
1135 Socket/process control group matching allows you to match locally
1136 generated packets based on which net_cls control group processes
1139 config NETFILTER_XT_MATCH_CLUSTER
1140 tristate '"cluster" match support'
1141 depends on NF_CONNTRACK
1142 depends on NETFILTER_ADVANCED
1144 This option allows you to build work-load-sharing clusters of
1145 network servers/stateful firewalls without having a dedicated
1146 load-balancing router/server/switch. Basically, this match returns
1147 true when the packet must be handled by this cluster node. Thus,
1148 all nodes see all packets and this match decides which node handles
1149 what packets. The work-load sharing algorithm is based on source
1152 If you say Y or M here, try `iptables -m cluster --help` for
1155 config NETFILTER_XT_MATCH_COMMENT
1156 tristate '"comment" match support'
1157 depends on NETFILTER_ADVANCED
1159 This option adds a `comment' dummy-match, which allows you to put
1160 comments in your iptables ruleset.
1162 If you want to compile it as a module, say M here and read
1163 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1165 config NETFILTER_XT_MATCH_CONNBYTES
1166 tristate '"connbytes" per-connection counter match support'
1167 depends on NF_CONNTRACK
1168 depends on NETFILTER_ADVANCED
1170 This option adds a `connbytes' match, which allows you to match the
1171 number of bytes and/or packets for each direction within a connection.
1173 If you want to compile it as a module, say M here and read
1174 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1176 config NETFILTER_XT_MATCH_CONNLABEL
1177 tristate '"connlabel" match support'
1178 select NF_CONNTRACK_LABELS
1179 depends on NF_CONNTRACK
1180 depends on NETFILTER_ADVANCED
1182 This match allows you to test and assign userspace-defined labels names
1183 to a connection. The kernel only stores bit values - mapping
1184 names to bits is done by userspace.
1186 Unlike connmark, more than 32 flag bits may be assigned to a
1187 connection simultaneously.
1189 config NETFILTER_XT_MATCH_CONNLIMIT
1190 tristate '"connlimit" match support'
1191 depends on NF_CONNTRACK
1192 depends on NETFILTER_ADVANCED
1193 select NETFILTER_CONNCOUNT
1195 This match allows you to match against the number of parallel
1196 connections to a server per client IP address (or address block).
1198 config NETFILTER_XT_MATCH_CONNMARK
1199 tristate '"connmark" connection mark match support'
1200 depends on NF_CONNTRACK
1201 depends on NETFILTER_ADVANCED
1202 select NETFILTER_XT_CONNMARK
1204 This is a backwards-compat option for the user's convenience
1205 (e.g. when running oldconfig). It selects
1206 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
1208 config NETFILTER_XT_MATCH_CONNTRACK
1209 tristate '"conntrack" connection tracking match support'
1210 depends on NF_CONNTRACK
1211 default m if NETFILTER_ADVANCED=n
1213 This is a general conntrack match module, a superset of the state match.
1215 It allows matching on additional conntrack information, which is
1216 useful in complex configurations, such as NAT gateways with multiple
1217 internet links or tunnels.
1219 To compile it as a module, choose M here. If unsure, say N.
1221 config NETFILTER_XT_MATCH_CPU
1222 tristate '"cpu" match support'
1223 depends on NETFILTER_ADVANCED
1225 CPU matching allows you to match packets based on the CPU
1226 currently handling the packet.
1228 To compile it as a module, choose M here. If unsure, say N.
1230 config NETFILTER_XT_MATCH_DCCP
1231 tristate '"dccp" protocol match support'
1232 depends on NETFILTER_ADVANCED
1235 With this option enabled, you will be able to use the iptables
1236 `dccp' match in order to match on DCCP source/destination ports
1239 If you want to compile it as a module, say M here and read
1240 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1242 config NETFILTER_XT_MATCH_DEVGROUP
1243 tristate '"devgroup" match support'
1244 depends on NETFILTER_ADVANCED
1246 This options adds a `devgroup' match, which allows to match on the
1247 device group a network device is assigned to.
1249 To compile it as a module, choose M here. If unsure, say N.
1251 config NETFILTER_XT_MATCH_DSCP
1252 tristate '"dscp" and "tos" match support'
1253 depends on NETFILTER_ADVANCED
1255 This option adds a `DSCP' match, which allows you to match against
1256 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
1258 The DSCP field can have any value between 0x0 and 0x3f inclusive.
1260 It will also add a "tos" match, which allows you to match packets
1261 based on the Type Of Service fields of the IPv4 packet (which share
1262 the same bits as DSCP).
1264 To compile it as a module, choose M here. If unsure, say N.
1266 config NETFILTER_XT_MATCH_ECN
1267 tristate '"ecn" match support'
1268 depends on NETFILTER_ADVANCED
1270 This option adds an "ECN" match, which allows you to match against
1271 the IPv4 and TCP header ECN fields.
1273 To compile it as a module, choose M here. If unsure, say N.
1275 config NETFILTER_XT_MATCH_ESP
1276 tristate '"esp" match support'
1277 depends on NETFILTER_ADVANCED
1279 This match extension allows you to match a range of SPIs
1280 inside ESP header of IPSec packets.
1282 To compile it as a module, choose M here. If unsure, say N.
1284 config NETFILTER_XT_MATCH_HASHLIMIT
1285 tristate '"hashlimit" match support'
1286 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1287 depends on NETFILTER_ADVANCED
1289 This option adds a `hashlimit' match.
1291 As opposed to `limit', this match dynamically creates a hash table
1292 of limit buckets, based on your selection of source/destination
1293 addresses and/or ports.
1295 It enables you to express policies like `10kpps for any given
1296 destination address' or `500pps from any given source address'
1299 config NETFILTER_XT_MATCH_HELPER
1300 tristate '"helper" match support'
1301 depends on NF_CONNTRACK
1302 depends on NETFILTER_ADVANCED
1304 Helper matching allows you to match packets in dynamic connections
1305 tracked by a conntrack-helper, ie. ip_conntrack_ftp
1307 To compile it as a module, choose M here. If unsure, say Y.
1309 config NETFILTER_XT_MATCH_HL
1310 tristate '"hl" hoplimit/TTL match support'
1311 depends on NETFILTER_ADVANCED
1313 HL matching allows you to match packets based on the hoplimit
1314 in the IPv6 header, or the time-to-live field in the IPv4
1315 header of the packet.
1317 config NETFILTER_XT_MATCH_IPCOMP
1318 tristate '"ipcomp" match support'
1319 depends on NETFILTER_ADVANCED
1321 This match extension allows you to match a range of CPIs(16 bits)
1322 inside IPComp header of IPSec packets.
1324 To compile it as a module, choose M here. If unsure, say N.
1326 config NETFILTER_XT_MATCH_IPRANGE
1327 tristate '"iprange" address range match support'
1328 depends on NETFILTER_ADVANCED
1330 This option adds a "iprange" match, which allows you to match based on
1331 an IP address range. (Normal iptables only matches on single addresses
1332 with an optional mask.)
1336 config NETFILTER_XT_MATCH_IPVS
1337 tristate '"ipvs" match support'
1339 depends on NETFILTER_ADVANCED
1340 depends on NF_CONNTRACK
1342 This option allows you to match against IPVS properties of a packet.
1346 config NETFILTER_XT_MATCH_L2TP
1347 tristate '"l2tp" match support'
1348 depends on NETFILTER_ADVANCED
1351 This option adds an "L2TP" match, which allows you to match against
1352 L2TP protocol header fields.
1354 To compile it as a module, choose M here. If unsure, say N.
1356 config NETFILTER_XT_MATCH_LENGTH
1357 tristate '"length" match support'
1358 depends on NETFILTER_ADVANCED
1360 This option allows you to match the length of a packet against a
1361 specific value or range of values.
1363 To compile it as a module, choose M here. If unsure, say N.
1365 config NETFILTER_XT_MATCH_LIMIT
1366 tristate '"limit" match support'
1367 depends on NETFILTER_ADVANCED
1369 limit matching allows you to control the rate at which a rule can be
1370 matched: mainly useful in combination with the LOG target ("LOG
1371 target support", below) and to avoid some Denial of Service attacks.
1373 To compile it as a module, choose M here. If unsure, say N.
1375 config NETFILTER_XT_MATCH_MAC
1376 tristate '"mac" address match support'
1377 depends on NETFILTER_ADVANCED
1379 MAC matching allows you to match packets based on the source
1380 Ethernet address of the packet.
1382 To compile it as a module, choose M here. If unsure, say N.
1384 config NETFILTER_XT_MATCH_MARK
1385 tristate '"mark" match support'
1386 depends on NETFILTER_ADVANCED
1387 select NETFILTER_XT_MARK
1389 This is a backwards-compat option for the user's convenience
1390 (e.g. when running oldconfig). It selects
1391 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
1393 config NETFILTER_XT_MATCH_MULTIPORT
1394 tristate '"multiport" Multiple port match support'
1395 depends on NETFILTER_ADVANCED
1397 Multiport matching allows you to match TCP or UDP packets based on
1398 a series of source or destination ports: normally a rule can only
1399 match a single range of ports.
1401 To compile it as a module, choose M here. If unsure, say N.
1403 config NETFILTER_XT_MATCH_NFACCT
1404 tristate '"nfacct" match support'
1405 depends on NETFILTER_ADVANCED
1406 select NETFILTER_NETLINK_ACCT
1408 This option allows you to use the extended accounting through
1411 To compile it as a module, choose M here. If unsure, say N.
1413 config NETFILTER_XT_MATCH_OSF
1414 tristate '"osf" Passive OS fingerprint match'
1415 depends on NETFILTER_ADVANCED
1416 select NETFILTER_NETLINK_OSF
1418 This option selects the Passive OS Fingerprinting match module
1419 that allows to passively match the remote operating system by
1420 analyzing incoming TCP SYN packets.
1422 Rules and loading software can be downloaded from
1423 http://www.ioremap.net/projects/osf
1425 To compile it as a module, choose M here. If unsure, say N.
1427 config NETFILTER_XT_MATCH_OWNER
1428 tristate '"owner" match support'
1429 depends on NETFILTER_ADVANCED
1431 Socket owner matching allows you to match locally-generated packets
1432 based on who created the socket: the user or group. It is also
1433 possible to check whether a socket actually exists.
1435 config NETFILTER_XT_MATCH_POLICY
1436 tristate 'IPsec "policy" match support'
1438 default m if NETFILTER_ADVANCED=n
1440 Policy matching allows you to match packets based on the
1441 IPsec policy that was used during decapsulation/will
1442 be used during encapsulation.
1444 To compile it as a module, choose M here. If unsure, say N.
1446 config NETFILTER_XT_MATCH_PHYSDEV
1447 tristate '"physdev" match support'
1448 depends on BRIDGE && BRIDGE_NETFILTER
1449 depends on NETFILTER_ADVANCED
1451 Physdev packet matching matches against the physical bridge ports
1452 the IP packet arrived on or will leave by.
1454 To compile it as a module, choose M here. If unsure, say N.
1456 config NETFILTER_XT_MATCH_PKTTYPE
1457 tristate '"pkttype" packet type match support'
1458 depends on NETFILTER_ADVANCED
1460 Packet type matching allows you to match a packet by
1461 its "class", eg. BROADCAST, MULTICAST, ...
1464 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
1466 To compile it as a module, choose M here. If unsure, say N.
1468 config NETFILTER_XT_MATCH_QUOTA
1469 tristate '"quota" match support'
1470 depends on NETFILTER_ADVANCED
1472 This option adds a `quota' match, which allows to match on a
1475 If you want to compile it as a module, say M here and read
1476 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1478 config NETFILTER_XT_MATCH_RATEEST
1479 tristate '"rateest" match support'
1480 depends on NETFILTER_ADVANCED
1481 select NETFILTER_XT_TARGET_RATEEST
1483 This option adds a `rateest' match, which allows to match on the
1484 rate estimated by the RATEEST target.
1486 To compile it as a module, choose M here. If unsure, say N.
1488 config NETFILTER_XT_MATCH_REALM
1489 tristate '"realm" match support'
1490 depends on NETFILTER_ADVANCED
1491 select IP_ROUTE_CLASSID
1493 This option adds a `realm' match, which allows you to use the realm
1494 key from the routing subsystem inside iptables.
1496 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
1499 If you want to compile it as a module, say M here and read
1500 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1502 config NETFILTER_XT_MATCH_RECENT
1503 tristate '"recent" match support'
1504 depends on NETFILTER_ADVANCED
1506 This match is used for creating one or many lists of recently
1507 used addresses and then matching against that/those list(s).
1509 Short options are available by using 'iptables -m recent -h'
1510 Official Website: <http://snowman.net/projects/ipt_recent/>
1512 config NETFILTER_XT_MATCH_SCTP
1513 tristate '"sctp" protocol match support'
1514 depends on NETFILTER_ADVANCED
1517 With this option enabled, you will be able to use the
1518 `sctp' match in order to match on SCTP source/destination ports
1519 and SCTP chunk types.
1521 If you want to compile it as a module, say M here and read
1522 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1524 config NETFILTER_XT_MATCH_SOCKET
1525 tristate '"socket" match support'
1526 depends on NETFILTER_XTABLES
1527 depends on NETFILTER_ADVANCED
1528 depends on IPV6 || IPV6=n
1529 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1530 select NF_SOCKET_IPV4
1531 select NF_SOCKET_IPV6 if IP6_NF_IPTABLES
1532 select NF_DEFRAG_IPV4
1533 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES != n
1535 This option adds a `socket' match, which can be used to match
1536 packets for which a TCP or UDP socket lookup finds a valid socket.
1537 It can be used in combination with the MARK target and policy
1538 routing to implement full featured non-locally bound sockets.
1540 To compile it as a module, choose M here. If unsure, say N.
1542 config NETFILTER_XT_MATCH_STATE
1543 tristate '"state" match support'
1544 depends on NF_CONNTRACK
1545 default m if NETFILTER_ADVANCED=n
1547 Connection state matching allows you to match packets based on their
1548 relationship to a tracked connection (ie. previous packets). This
1549 is a powerful tool for packet classification.
1551 To compile it as a module, choose M here. If unsure, say N.
1553 config NETFILTER_XT_MATCH_STATISTIC
1554 tristate '"statistic" match support'
1555 depends on NETFILTER_ADVANCED
1557 This option adds a `statistic' match, which allows you to match
1558 on packets periodically or randomly with a given percentage.
1560 To compile it as a module, choose M here. If unsure, say N.
1562 config NETFILTER_XT_MATCH_STRING
1563 tristate '"string" match support'
1564 depends on NETFILTER_ADVANCED
1566 select TEXTSEARCH_KMP
1567 select TEXTSEARCH_BM
1568 select TEXTSEARCH_FSM
1570 This option adds a `string' match, which allows you to look for
1571 pattern matchings in packets.
1573 To compile it as a module, choose M here. If unsure, say N.
1575 config NETFILTER_XT_MATCH_TCPMSS
1576 tristate '"tcpmss" match support'
1577 depends on NETFILTER_ADVANCED
1579 This option adds a `tcpmss' match, which allows you to examine the
1580 MSS value of TCP SYN packets, which control the maximum packet size
1581 for that connection.
1583 To compile it as a module, choose M here. If unsure, say N.
1585 config NETFILTER_XT_MATCH_TIME
1586 tristate '"time" match support'
1587 depends on NETFILTER_ADVANCED
1589 This option adds a "time" match, which allows you to match based on
1590 the packet arrival time (at the machine which netfilter is running)
1591 on) or departure time/date (for locally generated packets).
1593 If you say Y here, try `iptables -m time --help` for
1596 If you want to compile it as a module, say M here.
1599 config NETFILTER_XT_MATCH_U32
1600 tristate '"u32" match support'
1601 depends on NETFILTER_ADVANCED
1603 u32 allows you to extract quantities of up to 4 bytes from a packet,
1604 AND them with specified masks, shift them by specified amounts and
1605 test whether the results are in any of a set of specified ranges.
1606 The specification of what to extract is general enough to skip over
1607 headers with lengths stored in the packet, as in IP or TCP header
1610 Details and examples are in the kernel module source.
1612 endif # NETFILTER_XTABLES
1616 source "net/netfilter/ipset/Kconfig"
1618 source "net/netfilter/ipvs/Kconfig"