1 menu "Core Netfilter Configuration"
2 depends on NET && INET && NETFILTER
4 config NETFILTER_NETLINK
7 config NETFILTER_NETLINK_QUEUE
8 tristate "Netfilter NFQUEUE over NFNETLINK interface"
9 depends on NETFILTER_ADVANCED
10 select NETFILTER_NETLINK
12 If this option is enabled, the kernel will include support
13 for queueing packets via NFNETLINK.
15 config NETFILTER_NETLINK_LOG
16 tristate "Netfilter LOG over NFNETLINK interface"
17 default m if NETFILTER_ADVANCED=n
18 select NETFILTER_NETLINK
20 If this option is enabled, the kernel will include support
21 for logging packets via NFNETLINK.
23 This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
24 and is also scheduled to replace the old syslog-based ipt_LOG
28 tristate "Netfilter connection tracking support"
29 default m if NETFILTER_ADVANCED=n
31 Connection tracking keeps a record of what packets have passed
32 through your machine, in order to figure out how they are related
35 This is required to do Masquerading or other kinds of Network
36 Address Translation. It can also be used to enhance packet
37 filtering (see `Connection state match support' below).
39 To compile it as a module, choose M here. If unsure, say N.
43 config NF_CONNTRACK_MARK
44 bool 'Connection mark tracking support'
45 depends on NETFILTER_ADVANCED
47 This option enables support for connection marks, used by the
48 `CONNMARK' target and `connmark' match. Similar to the mark value
49 of packets, but this mark value is kept in the conntrack session
50 instead of the individual packets.
52 config NF_CONNTRACK_SECMARK
53 bool 'Connection tracking security mark support'
54 depends on NETWORK_SECMARK
55 default m if NETFILTER_ADVANCED=n
57 This option enables security markings to be applied to
58 connections. Typically they are copied to connections from
59 packets using the CONNSECMARK target and copied back from
60 connections to packets with the same target, with the packets
61 being originally labeled via SECMARK.
65 config NF_CONNTRACK_ZONES
66 bool 'Connection tracking zones'
67 depends on NETFILTER_ADVANCED
68 depends on NETFILTER_XT_TARGET_CT
70 This option enables support for connection tracking zones.
71 Normally, each connection needs to have a unique system wide
72 identity. Connection tracking zones allow to have multiple
73 connections using the same identity, as long as they are
74 contained in different zones.
78 config NF_CONNTRACK_EVENTS
79 bool "Connection tracking events"
80 depends on NETFILTER_ADVANCED
82 If this option is enabled, the connection tracking code will
83 provide a notifier chain that can be used by other kernel code
84 to get notified about changes in the connection tracking state.
88 config NF_CONNTRACK_TIMESTAMP
89 bool 'Connection tracking timestamping'
90 depends on NETFILTER_ADVANCED
92 This option enables support for connection tracking timestamping.
93 This allows you to store the flow start-time and to obtain
94 the flow-stop time (once it has been destroyed) via Connection
99 config NF_CT_PROTO_DCCP
100 tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)'
101 depends on EXPERIMENTAL
102 depends on NETFILTER_ADVANCED
105 With this option enabled, the layer 3 independent connection
106 tracking code will be able to do state tracking on DCCP connections.
110 config NF_CT_PROTO_GRE
113 config NF_CT_PROTO_SCTP
114 tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
115 depends on EXPERIMENTAL
116 depends on NETFILTER_ADVANCED
119 With this option enabled, the layer 3 independent connection
120 tracking code will be able to do state tracking on SCTP connections.
122 If you want to compile it as a module, say M here and read
123 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
125 config NF_CT_PROTO_UDPLITE
126 tristate 'UDP-Lite protocol connection tracking support'
127 depends on NETFILTER_ADVANCED
129 With this option enabled, the layer 3 independent connection
130 tracking code will be able to do state tracking on UDP-Lite
133 To compile it as a module, choose M here. If unsure, say N.
135 config NF_CONNTRACK_AMANDA
136 tristate "Amanda backup protocol support"
137 depends on NETFILTER_ADVANCED
139 select TEXTSEARCH_KMP
141 If you are running the Amanda backup package <http://www.amanda.org/>
142 on this machine or machines that will be MASQUERADED through this
143 machine, then you may want to enable this feature. This allows the
144 connection tracking and natting code to allow the sub-channels that
145 Amanda requires for communication of the backup data, messages and
148 To compile it as a module, choose M here. If unsure, say N.
150 config NF_CONNTRACK_FTP
151 tristate "FTP protocol support"
152 default m if NETFILTER_ADVANCED=n
154 Tracking FTP connections is problematic: special helpers are
155 required for tracking them, and doing masquerading and other forms
156 of Network Address Translation on them.
158 This is FTP support on Layer 3 independent connection tracking.
159 Layer 3 independent connection tracking is experimental scheme
160 which generalize ip_conntrack to support other layer 3 protocols.
162 To compile it as a module, choose M here. If unsure, say N.
164 config NF_CONNTRACK_H323
165 tristate "H.323 protocol support"
166 depends on (IPV6 || IPV6=n)
167 depends on NETFILTER_ADVANCED
169 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
170 important VoIP protocols, it is widely used by voice hardware and
171 software including voice gateways, IP phones, Netmeeting, OpenPhone,
174 With this module you can support H.323 on a connection tracking/NAT
177 This module supports RAS, Fast Start, H.245 Tunnelling, Call
178 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
179 whiteboard, file transfer, etc. For more information, please
180 visit http://nath323.sourceforge.net/.
182 To compile it as a module, choose M here. If unsure, say N.
184 config NF_CONNTRACK_IRC
185 tristate "IRC protocol support"
186 default m if NETFILTER_ADVANCED=n
188 There is a commonly-used extension to IRC called
189 Direct Client-to-Client Protocol (DCC). This enables users to send
190 files to each other, and also chat to each other without the need
191 of a server. DCC Sending is used anywhere you send files over IRC,
192 and DCC Chat is most commonly used by Eggdrop bots. If you are
193 using NAT, this extension will enable you to send files and initiate
194 chats. Note that you do NOT need this extension to get files or
195 have others initiate chats, or everything else in IRC.
197 To compile it as a module, choose M here. If unsure, say N.
199 config NF_CONNTRACK_BROADCAST
202 config NF_CONNTRACK_NETBIOS_NS
203 tristate "NetBIOS name service protocol support"
204 select NF_CONNTRACK_BROADCAST
206 NetBIOS name service requests are sent as broadcast messages from an
207 unprivileged port and responded to with unicast messages to the
208 same port. This make them hard to firewall properly because connection
209 tracking doesn't deal with broadcasts. This helper tracks locally
210 originating NetBIOS name service requests and the corresponding
211 responses. It relies on correct IP address configuration, specifically
212 netmask and broadcast address. When properly configured, the output
213 of "ip address show" should look similar to this:
215 $ ip -4 address show eth0
216 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
217 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
219 To compile it as a module, choose M here. If unsure, say N.
221 config NF_CONNTRACK_SNMP
222 tristate "SNMP service protocol support"
223 depends on NETFILTER_ADVANCED
224 select NF_CONNTRACK_BROADCAST
226 SNMP service requests are sent as broadcast messages from an
227 unprivileged port and responded to with unicast messages to the
228 same port. This make them hard to firewall properly because connection
229 tracking doesn't deal with broadcasts. This helper tracks locally
230 originating SNMP service requests and the corresponding
231 responses. It relies on correct IP address configuration, specifically
232 netmask and broadcast address.
234 To compile it as a module, choose M here. If unsure, say N.
236 config NF_CONNTRACK_PPTP
237 tristate "PPtP protocol support"
238 depends on NETFILTER_ADVANCED
239 select NF_CT_PROTO_GRE
241 This module adds support for PPTP (Point to Point Tunnelling
242 Protocol, RFC2637) connection tracking and NAT.
244 If you are running PPTP sessions over a stateful firewall or NAT
245 box, you may want to enable this feature.
247 Please note that not all PPTP modes of operation are supported yet.
248 Specifically these limitations exist:
249 - Blindly assumes that control connections are always established
250 in PNS->PAC direction. This is a violation of RFC2637.
251 - Only supports a single call within each session
253 To compile it as a module, choose M here. If unsure, say N.
255 config NF_CONNTRACK_SANE
256 tristate "SANE protocol support (EXPERIMENTAL)"
257 depends on EXPERIMENTAL
258 depends on NETFILTER_ADVANCED
260 SANE is a protocol for remote access to scanners as implemented
261 by the 'saned' daemon. Like FTP, it uses separate control and
264 With this module you can support SANE on a connection tracking
267 To compile it as a module, choose M here. If unsure, say N.
269 config NF_CONNTRACK_SIP
270 tristate "SIP protocol support"
271 default m if NETFILTER_ADVANCED=n
273 SIP is an application-layer control protocol that can establish,
274 modify, and terminate multimedia sessions (conferences) such as
275 Internet telephony calls. With the ip_conntrack_sip and
276 the nf_nat_sip modules you can support the protocol on a connection
277 tracking/NATing firewall.
279 To compile it as a module, choose M here. If unsure, say N.
281 config NF_CONNTRACK_TFTP
282 tristate "TFTP protocol support"
283 depends on NETFILTER_ADVANCED
285 TFTP connection tracking helper, this is required depending
286 on how restrictive your ruleset is.
287 If you are using a tftp client behind -j SNAT or -j MASQUERADING
290 To compile it as a module, choose M here. If unsure, say N.
293 tristate 'Connection tracking netlink interface'
294 select NETFILTER_NETLINK
295 default m if NETFILTER_ADVANCED=n
297 This option enables support for a netlink-based userspace interface
301 # transparent proxy support
302 config NETFILTER_TPROXY
303 tristate "Transparent proxying support (EXPERIMENTAL)"
304 depends on EXPERIMENTAL
305 depends on IP_NF_MANGLE
306 depends on NETFILTER_ADVANCED
308 This option enables transparent proxying support, that is,
309 support for handling non-locally bound IPv4 TCP and UDP sockets.
310 For it to work you will have to configure certain iptables rules
311 and use policy routing. For more information on how to set it up
312 see Documentation/networking/tproxy.txt.
314 To compile it as a module, choose M here. If unsure, say N.
316 config NETFILTER_XTABLES
317 tristate "Netfilter Xtables support (required for ip_tables)"
318 default m if NETFILTER_ADVANCED=n
320 This is required if you intend to use any of ip_tables,
321 ip6_tables or arp_tables.
325 comment "Xtables combined modules"
327 config NETFILTER_XT_MARK
328 tristate 'nfmark target and match support'
329 default m if NETFILTER_ADVANCED=n
331 This option adds the "MARK" target and "mark" match.
333 Netfilter mark matching allows you to match packets based on the
334 "nfmark" value in the packet.
335 The target allows you to create rules in the "mangle" table which alter
336 the netfilter mark (nfmark) field associated with the packet.
338 Prior to routing, the nfmark can influence the routing method (see
339 "Use netfilter MARK value as routing key") and can also be used by
340 other subsystems to change their behavior.
342 config NETFILTER_XT_CONNMARK
343 tristate 'ctmark target and match support'
344 depends on NF_CONNTRACK
345 depends on NETFILTER_ADVANCED
346 select NF_CONNTRACK_MARK
348 This option adds the "CONNMARK" target and "connmark" match.
350 Netfilter allows you to store a mark value per connection (a.k.a.
351 ctmark), similarly to the packet mark (nfmark). Using this
352 target and match, you can set and match on this mark.
354 config NETFILTER_XT_SET
355 tristate 'set target and match support'
357 depends on NETFILTER_ADVANCED
359 This option adds the "SET" target and "set" match.
361 Using this target and match, you can add/delete and match
362 elements in the sets created by ipset(8).
364 To compile it as a module, choose M here. If unsure, say N.
366 # alphabetically ordered list of targets
368 comment "Xtables targets"
370 config NETFILTER_XT_TARGET_AUDIT
371 tristate "AUDIT target support"
373 depends on NETFILTER_ADVANCED
375 This option adds a 'AUDIT' target, which can be used to create
376 audit records for packets dropped/accepted.
378 To compileit as a module, choose M here. If unsure, say N.
380 config NETFILTER_XT_TARGET_CHECKSUM
381 tristate "CHECKSUM target support"
382 depends on IP_NF_MANGLE || IP6_NF_MANGLE
383 depends on NETFILTER_ADVANCED
385 This option adds a `CHECKSUM' target, which can be used in the iptables mangle
388 You can use this target to compute and fill in the checksum in
389 a packet that lacks a checksum. This is particularly useful,
390 if you need to work around old applications such as dhcp clients,
391 that do not work well with checksum offloads, but don't want to disable
392 checksum offload in your device.
394 To compile it as a module, choose M here. If unsure, say N.
396 config NETFILTER_XT_TARGET_CLASSIFY
397 tristate '"CLASSIFY" target support'
398 depends on NETFILTER_ADVANCED
400 This option adds a `CLASSIFY' target, which enables the user to set
401 the priority of a packet. Some qdiscs can use this value for
402 classification, among these are:
404 atm, cbq, dsmark, pfifo_fast, htb, prio
406 To compile it as a module, choose M here. If unsure, say N.
408 config NETFILTER_XT_TARGET_CONNMARK
409 tristate '"CONNMARK" target support'
410 depends on NF_CONNTRACK
411 depends on NETFILTER_ADVANCED
412 select NETFILTER_XT_CONNMARK
414 This is a backwards-compat option for the user's convenience
415 (e.g. when running oldconfig). It selects
416 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
418 config NETFILTER_XT_TARGET_CONNSECMARK
419 tristate '"CONNSECMARK" target support'
420 depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
421 default m if NETFILTER_ADVANCED=n
423 The CONNSECMARK target copies security markings from packets
424 to connections, and restores security markings from connections
425 to packets (if the packets are not already marked). This would
426 normally be used in conjunction with the SECMARK target.
428 To compile it as a module, choose M here. If unsure, say N.
430 config NETFILTER_XT_TARGET_CT
431 tristate '"CT" target support'
432 depends on NF_CONNTRACK
433 depends on IP_NF_RAW || IP6_NF_RAW
434 depends on NETFILTER_ADVANCED
436 This options adds a `CT' target, which allows to specify initial
437 connection tracking parameters like events to be delivered and
438 the helper to be used.
440 To compile it as a module, choose M here. If unsure, say N.
442 config NETFILTER_XT_TARGET_DSCP
443 tristate '"DSCP" and "TOS" target support'
444 depends on IP_NF_MANGLE || IP6_NF_MANGLE
445 depends on NETFILTER_ADVANCED
447 This option adds a `DSCP' target, which allows you to manipulate
448 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
450 The DSCP field can have any value between 0x0 and 0x3f inclusive.
452 It also adds the "TOS" target, which allows you to create rules in
453 the "mangle" table which alter the Type Of Service field of an IPv4
454 or the Priority field of an IPv6 packet, prior to routing.
456 To compile it as a module, choose M here. If unsure, say N.
458 config NETFILTER_XT_TARGET_HL
459 tristate '"HL" hoplimit target support'
460 depends on IP_NF_MANGLE || IP6_NF_MANGLE
461 depends on NETFILTER_ADVANCED
463 This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
464 targets, which enable the user to change the
465 hoplimit/time-to-live value of the IP header.
467 While it is safe to decrement the hoplimit/TTL value, the
468 modules also allow to increment and set the hoplimit value of
469 the header to arbitrary values. This is EXTREMELY DANGEROUS
470 since you can easily create immortal packets that loop
471 forever on the network.
473 config NETFILTER_XT_TARGET_IDLETIMER
474 tristate "IDLETIMER target support"
475 depends on NETFILTER_ADVANCED
478 This option adds the `IDLETIMER' target. Each matching packet
479 resets the timer associated with label specified when the rule is
480 added. When the timer expires, it triggers a sysfs notification.
481 The remaining time for expiration can be read via sysfs.
483 To compile it as a module, choose M here. If unsure, say N.
485 config NETFILTER_XT_TARGET_LED
486 tristate '"LED" target support'
487 depends on LEDS_CLASS && LEDS_TRIGGERS
488 depends on NETFILTER_ADVANCED
490 This option adds a `LED' target, which allows you to blink LEDs in
491 response to particular packets passing through your machine.
493 This can be used to turn a spare LED into a network activity LED,
494 which only flashes in response to FTP transfers, for example. Or
495 you could have an LED which lights up for a minute or two every time
496 somebody connects to your machine via SSH.
498 You will need support for the "led" class to make this work.
500 To create an LED trigger for incoming SSH traffic:
501 iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
503 Then attach the new trigger to an LED on your system:
504 echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
506 For more information on the LEDs available on your system, see
507 Documentation/leds/leds-class.txt
509 config NETFILTER_XT_TARGET_MARK
510 tristate '"MARK" target support'
511 depends on NETFILTER_ADVANCED
512 select NETFILTER_XT_MARK
514 This is a backwards-compat option for the user's convenience
515 (e.g. when running oldconfig). It selects
516 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
518 config NETFILTER_XT_TARGET_NFLOG
519 tristate '"NFLOG" target support'
520 default m if NETFILTER_ADVANCED=n
521 select NETFILTER_NETLINK_LOG
523 This option enables the NFLOG target, which allows to LOG
524 messages through nfnetlink_log.
526 To compile it as a module, choose M here. If unsure, say N.
528 config NETFILTER_XT_TARGET_NFQUEUE
529 tristate '"NFQUEUE" target Support'
530 depends on NETFILTER_ADVANCED
531 select NETFILTER_NETLINK_QUEUE
533 This target replaced the old obsolete QUEUE target.
535 As opposed to QUEUE, it supports 65535 different queues,
538 To compile it as a module, choose M here. If unsure, say N.
540 config NETFILTER_XT_TARGET_NOTRACK
541 tristate '"NOTRACK" target support'
542 depends on IP_NF_RAW || IP6_NF_RAW
543 depends on NF_CONNTRACK
545 The NOTRACK target allows a select rule to specify
546 which packets *not* to enter the conntrack/NAT
547 subsystem with all the consequences (no ICMP error tracking,
548 no protocol helpers for the selected packets).
550 If you want to compile it as a module, say M here and read
551 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
553 config NETFILTER_XT_TARGET_RATEEST
554 tristate '"RATEEST" target support'
555 depends on NETFILTER_ADVANCED
557 This option adds a `RATEEST' target, which allows to measure
558 rates similar to TC estimators. The `rateest' match can be
559 used to match on the measured rates.
561 To compile it as a module, choose M here. If unsure, say N.
563 config NETFILTER_XT_TARGET_TEE
564 tristate '"TEE" - packet cloning to alternate destination'
565 depends on NETFILTER_ADVANCED
566 depends on (IPV6 || IPV6=n)
567 depends on !NF_CONNTRACK || NF_CONNTRACK
569 This option adds a "TEE" target with which a packet can be cloned and
570 this clone be rerouted to another nexthop.
572 config NETFILTER_XT_TARGET_TPROXY
573 tristate '"TPROXY" target support (EXPERIMENTAL)'
574 depends on EXPERIMENTAL
575 depends on NETFILTER_TPROXY
576 depends on NETFILTER_XTABLES
577 depends on NETFILTER_ADVANCED
578 select NF_DEFRAG_IPV4
579 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
581 This option adds a `TPROXY' target, which is somewhat similar to
582 REDIRECT. It can only be used in the mangle table and is useful
583 to redirect traffic to a transparent proxy. It does _not_ depend
584 on Netfilter connection tracking and NAT, unlike REDIRECT.
586 To compile it as a module, choose M here. If unsure, say N.
588 config NETFILTER_XT_TARGET_TRACE
589 tristate '"TRACE" target support'
590 depends on IP_NF_RAW || IP6_NF_RAW
591 depends on NETFILTER_ADVANCED
593 The TRACE target allows you to mark packets so that the kernel
594 will log every rule which match the packets as those traverse
595 the tables, chains, rules.
597 If you want to compile it as a module, say M here and read
598 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
600 config NETFILTER_XT_TARGET_SECMARK
601 tristate '"SECMARK" target support'
602 depends on NETWORK_SECMARK
603 default m if NETFILTER_ADVANCED=n
605 The SECMARK target allows security marking of network
606 packets, for use with security subsystems.
608 To compile it as a module, choose M here. If unsure, say N.
610 config NETFILTER_XT_TARGET_TCPMSS
611 tristate '"TCPMSS" target support'
612 depends on (IPV6 || IPV6=n)
613 default m if NETFILTER_ADVANCED=n
615 This option adds a `TCPMSS' target, which allows you to alter the
616 MSS value of TCP SYN packets, to control the maximum size for that
617 connection (usually limiting it to your outgoing interface's MTU
620 This is used to overcome criminally braindead ISPs or servers which
621 block ICMP Fragmentation Needed packets. The symptoms of this
622 problem are that everything works fine from your Linux
623 firewall/router, but machines behind it can never exchange large
625 1) Web browsers connect, then hang with no data received.
626 2) Small mail works fine, but large emails hang.
627 3) ssh works fine, but scp hangs after initial handshaking.
629 Workaround: activate this option and add a rule to your firewall
632 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
633 -j TCPMSS --clamp-mss-to-pmtu
635 To compile it as a module, choose M here. If unsure, say N.
637 config NETFILTER_XT_TARGET_TCPOPTSTRIP
638 tristate '"TCPOPTSTRIP" target support (EXPERIMENTAL)'
639 depends on EXPERIMENTAL
640 depends on IP_NF_MANGLE || IP6_NF_MANGLE
641 depends on NETFILTER_ADVANCED
643 This option adds a "TCPOPTSTRIP" target, which allows you to strip
644 TCP options from TCP packets.
646 # alphabetically ordered list of matches
648 comment "Xtables matches"
650 config NETFILTER_XT_MATCH_ADDRTYPE
651 tristate '"addrtype" address type match support'
652 depends on NETFILTER_ADVANCED
654 This option allows you to match what routing thinks of an address,
655 eg. UNICAST, LOCAL, BROADCAST, ...
657 If you want to compile it as a module, say M here and read
658 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
660 config NETFILTER_XT_MATCH_CLUSTER
661 tristate '"cluster" match support'
662 depends on NF_CONNTRACK
663 depends on NETFILTER_ADVANCED
665 This option allows you to build work-load-sharing clusters of
666 network servers/stateful firewalls without having a dedicated
667 load-balancing router/server/switch. Basically, this match returns
668 true when the packet must be handled by this cluster node. Thus,
669 all nodes see all packets and this match decides which node handles
670 what packets. The work-load sharing algorithm is based on source
673 If you say Y or M here, try `iptables -m cluster --help` for
676 config NETFILTER_XT_MATCH_COMMENT
677 tristate '"comment" match support'
678 depends on NETFILTER_ADVANCED
680 This option adds a `comment' dummy-match, which allows you to put
681 comments in your iptables ruleset.
683 If you want to compile it as a module, say M here and read
684 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
686 config NETFILTER_XT_MATCH_CONNBYTES
687 tristate '"connbytes" per-connection counter match support'
688 depends on NF_CONNTRACK
689 depends on NETFILTER_ADVANCED
691 This option adds a `connbytes' match, which allows you to match the
692 number of bytes and/or packets for each direction within a connection.
694 If you want to compile it as a module, say M here and read
695 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
697 config NETFILTER_XT_MATCH_CONNLIMIT
698 tristate '"connlimit" match support"'
699 depends on NF_CONNTRACK
700 depends on NETFILTER_ADVANCED
702 This match allows you to match against the number of parallel
703 connections to a server per client IP address (or address block).
705 config NETFILTER_XT_MATCH_CONNMARK
706 tristate '"connmark" connection mark match support'
707 depends on NF_CONNTRACK
708 depends on NETFILTER_ADVANCED
709 select NETFILTER_XT_CONNMARK
711 This is a backwards-compat option for the user's convenience
712 (e.g. when running oldconfig). It selects
713 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
715 config NETFILTER_XT_MATCH_CONNTRACK
716 tristate '"conntrack" connection tracking match support'
717 depends on NF_CONNTRACK
718 default m if NETFILTER_ADVANCED=n
720 This is a general conntrack match module, a superset of the state match.
722 It allows matching on additional conntrack information, which is
723 useful in complex configurations, such as NAT gateways with multiple
724 internet links or tunnels.
726 To compile it as a module, choose M here. If unsure, say N.
728 config NETFILTER_XT_MATCH_CPU
729 tristate '"cpu" match support'
730 depends on NETFILTER_ADVANCED
732 CPU matching allows you to match packets based on the CPU
733 currently handling the packet.
735 To compile it as a module, choose M here. If unsure, say N.
737 config NETFILTER_XT_MATCH_DCCP
738 tristate '"dccp" protocol match support'
739 depends on NETFILTER_ADVANCED
742 With this option enabled, you will be able to use the iptables
743 `dccp' match in order to match on DCCP source/destination ports
746 If you want to compile it as a module, say M here and read
747 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
749 config NETFILTER_XT_MATCH_DEVGROUP
750 tristate '"devgroup" match support'
751 depends on NETFILTER_ADVANCED
753 This options adds a `devgroup' match, which allows to match on the
754 device group a network device is assigned to.
756 To compile it as a module, choose M here. If unsure, say N.
758 config NETFILTER_XT_MATCH_DSCP
759 tristate '"dscp" and "tos" match support'
760 depends on NETFILTER_ADVANCED
762 This option adds a `DSCP' match, which allows you to match against
763 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
765 The DSCP field can have any value between 0x0 and 0x3f inclusive.
767 It will also add a "tos" match, which allows you to match packets
768 based on the Type Of Service fields of the IPv4 packet (which share
769 the same bits as DSCP).
771 To compile it as a module, choose M here. If unsure, say N.
773 config NETFILTER_XT_MATCH_ESP
774 tristate '"esp" match support'
775 depends on NETFILTER_ADVANCED
777 This match extension allows you to match a range of SPIs
778 inside ESP header of IPSec packets.
780 To compile it as a module, choose M here. If unsure, say N.
782 config NETFILTER_XT_MATCH_HASHLIMIT
783 tristate '"hashlimit" match support'
784 depends on (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
785 depends on NETFILTER_ADVANCED
787 This option adds a `hashlimit' match.
789 As opposed to `limit', this match dynamically creates a hash table
790 of limit buckets, based on your selection of source/destination
791 addresses and/or ports.
793 It enables you to express policies like `10kpps for any given
794 destination address' or `500pps from any given source address'
797 config NETFILTER_XT_MATCH_HELPER
798 tristate '"helper" match support'
799 depends on NF_CONNTRACK
800 depends on NETFILTER_ADVANCED
802 Helper matching allows you to match packets in dynamic connections
803 tracked by a conntrack-helper, ie. ip_conntrack_ftp
805 To compile it as a module, choose M here. If unsure, say Y.
807 config NETFILTER_XT_MATCH_HL
808 tristate '"hl" hoplimit/TTL match support'
809 depends on NETFILTER_ADVANCED
811 HL matching allows you to match packets based on the hoplimit
812 in the IPv6 header, or the time-to-live field in the IPv4
813 header of the packet.
815 config NETFILTER_XT_MATCH_IPRANGE
816 tristate '"iprange" address range match support'
817 depends on NETFILTER_ADVANCED
819 This option adds a "iprange" match, which allows you to match based on
820 an IP address range. (Normal iptables only matches on single addresses
821 with an optional mask.)
825 config NETFILTER_XT_MATCH_IPVS
826 tristate '"ipvs" match support'
828 depends on NETFILTER_ADVANCED
829 depends on NF_CONNTRACK
831 This option allows you to match against IPVS properties of a packet.
835 config NETFILTER_XT_MATCH_LENGTH
836 tristate '"length" match support'
837 depends on NETFILTER_ADVANCED
839 This option allows you to match the length of a packet against a
840 specific value or range of values.
842 To compile it as a module, choose M here. If unsure, say N.
844 config NETFILTER_XT_MATCH_LIMIT
845 tristate '"limit" match support'
846 depends on NETFILTER_ADVANCED
848 limit matching allows you to control the rate at which a rule can be
849 matched: mainly useful in combination with the LOG target ("LOG
850 target support", below) and to avoid some Denial of Service attacks.
852 To compile it as a module, choose M here. If unsure, say N.
854 config NETFILTER_XT_MATCH_MAC
855 tristate '"mac" address match support'
856 depends on NETFILTER_ADVANCED
858 MAC matching allows you to match packets based on the source
859 Ethernet address of the packet.
861 To compile it as a module, choose M here. If unsure, say N.
863 config NETFILTER_XT_MATCH_MARK
864 tristate '"mark" match support'
865 depends on NETFILTER_ADVANCED
866 select NETFILTER_XT_MARK
868 This is a backwards-compat option for the user's convenience
869 (e.g. when running oldconfig). It selects
870 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
872 config NETFILTER_XT_MATCH_MULTIPORT
873 tristate '"multiport" Multiple port match support'
874 depends on NETFILTER_ADVANCED
876 Multiport matching allows you to match TCP or UDP packets based on
877 a series of source or destination ports: normally a rule can only
878 match a single range of ports.
880 To compile it as a module, choose M here. If unsure, say N.
882 config NETFILTER_XT_MATCH_OSF
883 tristate '"osf" Passive OS fingerprint match'
884 depends on NETFILTER_ADVANCED && NETFILTER_NETLINK
886 This option selects the Passive OS Fingerprinting match module
887 that allows to passively match the remote operating system by
888 analyzing incoming TCP SYN packets.
890 Rules and loading software can be downloaded from
891 http://www.ioremap.net/projects/osf
893 To compile it as a module, choose M here. If unsure, say N.
895 config NETFILTER_XT_MATCH_OWNER
896 tristate '"owner" match support'
897 depends on NETFILTER_ADVANCED
899 Socket owner matching allows you to match locally-generated packets
900 based on who created the socket: the user or group. It is also
901 possible to check whether a socket actually exists.
903 config NETFILTER_XT_MATCH_POLICY
904 tristate 'IPsec "policy" match support'
906 default m if NETFILTER_ADVANCED=n
908 Policy matching allows you to match packets based on the
909 IPsec policy that was used during decapsulation/will
910 be used during encapsulation.
912 To compile it as a module, choose M here. If unsure, say N.
914 config NETFILTER_XT_MATCH_PHYSDEV
915 tristate '"physdev" match support'
916 depends on BRIDGE && BRIDGE_NETFILTER
917 depends on NETFILTER_ADVANCED
919 Physdev packet matching matches against the physical bridge ports
920 the IP packet arrived on or will leave by.
922 To compile it as a module, choose M here. If unsure, say N.
924 config NETFILTER_XT_MATCH_PKTTYPE
925 tristate '"pkttype" packet type match support'
926 depends on NETFILTER_ADVANCED
928 Packet type matching allows you to match a packet by
929 its "class", eg. BROADCAST, MULTICAST, ...
932 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
934 To compile it as a module, choose M here. If unsure, say N.
936 config NETFILTER_XT_MATCH_QUOTA
937 tristate '"quota" match support'
938 depends on NETFILTER_ADVANCED
940 This option adds a `quota' match, which allows to match on a
943 If you want to compile it as a module, say M here and read
944 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
946 config NETFILTER_XT_MATCH_RATEEST
947 tristate '"rateest" match support'
948 depends on NETFILTER_ADVANCED
949 select NETFILTER_XT_TARGET_RATEEST
951 This option adds a `rateest' match, which allows to match on the
952 rate estimated by the RATEEST target.
954 To compile it as a module, choose M here. If unsure, say N.
956 config NETFILTER_XT_MATCH_REALM
957 tristate '"realm" match support'
958 depends on NETFILTER_ADVANCED
959 select IP_ROUTE_CLASSID
961 This option adds a `realm' match, which allows you to use the realm
962 key from the routing subsystem inside iptables.
964 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
967 If you want to compile it as a module, say M here and read
968 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
970 config NETFILTER_XT_MATCH_RECENT
971 tristate '"recent" match support'
972 depends on NETFILTER_ADVANCED
974 This match is used for creating one or many lists of recently
975 used addresses and then matching against that/those list(s).
977 Short options are available by using 'iptables -m recent -h'
978 Official Website: <http://snowman.net/projects/ipt_recent/>
980 config NETFILTER_XT_MATCH_SCTP
981 tristate '"sctp" protocol match support (EXPERIMENTAL)'
982 depends on EXPERIMENTAL
983 depends on NETFILTER_ADVANCED
986 With this option enabled, you will be able to use the
987 `sctp' match in order to match on SCTP source/destination ports
988 and SCTP chunk types.
990 If you want to compile it as a module, say M here and read
991 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
993 config NETFILTER_XT_MATCH_SOCKET
994 tristate '"socket" match support (EXPERIMENTAL)'
995 depends on EXPERIMENTAL
996 depends on NETFILTER_TPROXY
997 depends on NETFILTER_XTABLES
998 depends on NETFILTER_ADVANCED
999 depends on !NF_CONNTRACK || NF_CONNTRACK
1000 select NF_DEFRAG_IPV4
1001 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
1003 This option adds a `socket' match, which can be used to match
1004 packets for which a TCP or UDP socket lookup finds a valid socket.
1005 It can be used in combination with the MARK target and policy
1006 routing to implement full featured non-locally bound sockets.
1008 To compile it as a module, choose M here. If unsure, say N.
1010 config NETFILTER_XT_MATCH_STATE
1011 tristate '"state" match support'
1012 depends on NF_CONNTRACK
1013 default m if NETFILTER_ADVANCED=n
1015 Connection state matching allows you to match packets based on their
1016 relationship to a tracked connection (ie. previous packets). This
1017 is a powerful tool for packet classification.
1019 To compile it as a module, choose M here. If unsure, say N.
1021 config NETFILTER_XT_MATCH_STATISTIC
1022 tristate '"statistic" match support'
1023 depends on NETFILTER_ADVANCED
1025 This option adds a `statistic' match, which allows you to match
1026 on packets periodically or randomly with a given percentage.
1028 To compile it as a module, choose M here. If unsure, say N.
1030 config NETFILTER_XT_MATCH_STRING
1031 tristate '"string" match support'
1032 depends on NETFILTER_ADVANCED
1034 select TEXTSEARCH_KMP
1035 select TEXTSEARCH_BM
1036 select TEXTSEARCH_FSM
1038 This option adds a `string' match, which allows you to look for
1039 pattern matchings in packets.
1041 To compile it as a module, choose M here. If unsure, say N.
1043 config NETFILTER_XT_MATCH_TCPMSS
1044 tristate '"tcpmss" match support'
1045 depends on NETFILTER_ADVANCED
1047 This option adds a `tcpmss' match, which allows you to examine the
1048 MSS value of TCP SYN packets, which control the maximum packet size
1049 for that connection.
1051 To compile it as a module, choose M here. If unsure, say N.
1053 config NETFILTER_XT_MATCH_TIME
1054 tristate '"time" match support'
1055 depends on NETFILTER_ADVANCED
1057 This option adds a "time" match, which allows you to match based on
1058 the packet arrival time (at the machine which netfilter is running)
1059 on) or departure time/date (for locally generated packets).
1061 If you say Y here, try `iptables -m time --help` for
1064 If you want to compile it as a module, say M here.
1067 config NETFILTER_XT_MATCH_U32
1068 tristate '"u32" match support'
1069 depends on NETFILTER_ADVANCED
1071 u32 allows you to extract quantities of up to 4 bytes from a packet,
1072 AND them with specified masks, shift them by specified amounts and
1073 test whether the results are in any of a set of specified ranges.
1074 The specification of what to extract is general enough to skip over
1075 headers with lengths stored in the packet, as in IP or TCP header
1078 Details and examples are in the kernel module source.
1080 endif # NETFILTER_XTABLES
1084 source "net/netfilter/ipset/Kconfig"
1086 source "net/netfilter/ipvs/Kconfig"