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 depends on NETFILTER_ADVANCED
205 select NF_CONNTRACK_BROADCAST
207 NetBIOS name service requests are sent as broadcast messages from an
208 unprivileged port and responded to with unicast messages to the
209 same port. This make them hard to firewall properly because connection
210 tracking doesn't deal with broadcasts. This helper tracks locally
211 originating NetBIOS name service requests and the corresponding
212 responses. It relies on correct IP address configuration, specifically
213 netmask and broadcast address. When properly configured, the output
214 of "ip address show" should look similar to this:
216 $ ip -4 address show eth0
217 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
218 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
220 To compile it as a module, choose M here. If unsure, say N.
222 config NF_CONNTRACK_SNMP
223 tristate "SNMP service protocol support"
224 depends on NETFILTER_ADVANCED
225 select NF_CONNTRACK_BROADCAST
227 SNMP service requests are sent as broadcast messages from an
228 unprivileged port and responded to with unicast messages to the
229 same port. This make them hard to firewall properly because connection
230 tracking doesn't deal with broadcasts. This helper tracks locally
231 originating SNMP service requests and the corresponding
232 responses. It relies on correct IP address configuration, specifically
233 netmask and broadcast address.
235 To compile it as a module, choose M here. If unsure, say N.
237 config NF_CONNTRACK_PPTP
238 tristate "PPtP protocol support"
239 depends on NETFILTER_ADVANCED
240 select NF_CT_PROTO_GRE
242 This module adds support for PPTP (Point to Point Tunnelling
243 Protocol, RFC2637) connection tracking and NAT.
245 If you are running PPTP sessions over a stateful firewall or NAT
246 box, you may want to enable this feature.
248 Please note that not all PPTP modes of operation are supported yet.
249 Specifically these limitations exist:
250 - Blindly assumes that control connections are always established
251 in PNS->PAC direction. This is a violation of RFC2637.
252 - Only supports a single call within each session
254 To compile it as a module, choose M here. If unsure, say N.
256 config NF_CONNTRACK_SANE
257 tristate "SANE protocol support (EXPERIMENTAL)"
258 depends on EXPERIMENTAL
259 depends on NETFILTER_ADVANCED
261 SANE is a protocol for remote access to scanners as implemented
262 by the 'saned' daemon. Like FTP, it uses separate control and
265 With this module you can support SANE on a connection tracking
268 To compile it as a module, choose M here. If unsure, say N.
270 config NF_CONNTRACK_SIP
271 tristate "SIP protocol support"
272 default m if NETFILTER_ADVANCED=n
274 SIP is an application-layer control protocol that can establish,
275 modify, and terminate multimedia sessions (conferences) such as
276 Internet telephony calls. With the ip_conntrack_sip and
277 the nf_nat_sip modules you can support the protocol on a connection
278 tracking/NATing firewall.
280 To compile it as a module, choose M here. If unsure, say N.
282 config NF_CONNTRACK_TFTP
283 tristate "TFTP protocol support"
284 depends on NETFILTER_ADVANCED
286 TFTP connection tracking helper, this is required depending
287 on how restrictive your ruleset is.
288 If you are using a tftp client behind -j SNAT or -j MASQUERADING
291 To compile it as a module, choose M here. If unsure, say N.
294 tristate 'Connection tracking netlink interface'
295 select NETFILTER_NETLINK
296 default m if NETFILTER_ADVANCED=n
298 This option enables support for a netlink-based userspace interface
302 # transparent proxy support
303 config NETFILTER_TPROXY
304 tristate "Transparent proxying support (EXPERIMENTAL)"
305 depends on EXPERIMENTAL
306 depends on IP_NF_MANGLE
307 depends on NETFILTER_ADVANCED
309 This option enables transparent proxying support, that is,
310 support for handling non-locally bound IPv4 TCP and UDP sockets.
311 For it to work you will have to configure certain iptables rules
312 and use policy routing. For more information on how to set it up
313 see Documentation/networking/tproxy.txt.
315 To compile it as a module, choose M here. If unsure, say N.
317 config NETFILTER_XTABLES
318 tristate "Netfilter Xtables support (required for ip_tables)"
319 default m if NETFILTER_ADVANCED=n
321 This is required if you intend to use any of ip_tables,
322 ip6_tables or arp_tables.
326 comment "Xtables combined modules"
328 config NETFILTER_XT_MARK
329 tristate 'nfmark target and match support'
330 default m if NETFILTER_ADVANCED=n
332 This option adds the "MARK" target and "mark" match.
334 Netfilter mark matching allows you to match packets based on the
335 "nfmark" value in the packet.
336 The target allows you to create rules in the "mangle" table which alter
337 the netfilter mark (nfmark) field associated with the packet.
339 Prior to routing, the nfmark can influence the routing method (see
340 "Use netfilter MARK value as routing key") and can also be used by
341 other subsystems to change their behavior.
343 config NETFILTER_XT_CONNMARK
344 tristate 'ctmark target and match support'
345 depends on NF_CONNTRACK
346 depends on NETFILTER_ADVANCED
347 select NF_CONNTRACK_MARK
349 This option adds the "CONNMARK" target and "connmark" match.
351 Netfilter allows you to store a mark value per connection (a.k.a.
352 ctmark), similarly to the packet mark (nfmark). Using this
353 target and match, you can set and match on this mark.
355 config NETFILTER_XT_SET
356 tristate 'set target and match support'
358 depends on NETFILTER_ADVANCED
360 This option adds the "SET" target and "set" match.
362 Using this target and match, you can add/delete and match
363 elements in the sets created by ipset(8).
365 To compile it as a module, choose M here. If unsure, say N.
367 # alphabetically ordered list of targets
369 comment "Xtables targets"
371 config NETFILTER_XT_TARGET_AUDIT
372 tristate "AUDIT target support"
374 depends on NETFILTER_ADVANCED
376 This option adds a 'AUDIT' target, which can be used to create
377 audit records for packets dropped/accepted.
379 To compileit as a module, choose M here. If unsure, say N.
381 config NETFILTER_XT_TARGET_CHECKSUM
382 tristate "CHECKSUM target support"
383 depends on IP_NF_MANGLE || IP6_NF_MANGLE
384 depends on NETFILTER_ADVANCED
386 This option adds a `CHECKSUM' target, which can be used in the iptables mangle
389 You can use this target to compute and fill in the checksum in
390 a packet that lacks a checksum. This is particularly useful,
391 if you need to work around old applications such as dhcp clients,
392 that do not work well with checksum offloads, but don't want to disable
393 checksum offload in your device.
395 To compile it as a module, choose M here. If unsure, say N.
397 config NETFILTER_XT_TARGET_CLASSIFY
398 tristate '"CLASSIFY" target support'
399 depends on NETFILTER_ADVANCED
401 This option adds a `CLASSIFY' target, which enables the user to set
402 the priority of a packet. Some qdiscs can use this value for
403 classification, among these are:
405 atm, cbq, dsmark, pfifo_fast, htb, prio
407 To compile it as a module, choose M here. If unsure, say N.
409 config NETFILTER_XT_TARGET_CONNMARK
410 tristate '"CONNMARK" target support'
411 depends on NF_CONNTRACK
412 depends on NETFILTER_ADVANCED
413 select NETFILTER_XT_CONNMARK
415 This is a backwards-compat option for the user's convenience
416 (e.g. when running oldconfig). It selects
417 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
419 config NETFILTER_XT_TARGET_CONNSECMARK
420 tristate '"CONNSECMARK" target support'
421 depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
422 default m if NETFILTER_ADVANCED=n
424 The CONNSECMARK target copies security markings from packets
425 to connections, and restores security markings from connections
426 to packets (if the packets are not already marked). This would
427 normally be used in conjunction with the SECMARK target.
429 To compile it as a module, choose M here. If unsure, say N.
431 config NETFILTER_XT_TARGET_CT
432 tristate '"CT" target support'
433 depends on NF_CONNTRACK
434 depends on IP_NF_RAW || IP6_NF_RAW
435 depends on NETFILTER_ADVANCED
437 This options adds a `CT' target, which allows to specify initial
438 connection tracking parameters like events to be delivered and
439 the helper to be used.
441 To compile it as a module, choose M here. If unsure, say N.
443 config NETFILTER_XT_TARGET_DSCP
444 tristate '"DSCP" and "TOS" target support'
445 depends on IP_NF_MANGLE || IP6_NF_MANGLE
446 depends on NETFILTER_ADVANCED
448 This option adds a `DSCP' target, which allows you to manipulate
449 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
451 The DSCP field can have any value between 0x0 and 0x3f inclusive.
453 It also adds the "TOS" target, which allows you to create rules in
454 the "mangle" table which alter the Type Of Service field of an IPv4
455 or the Priority field of an IPv6 packet, prior to routing.
457 To compile it as a module, choose M here. If unsure, say N.
459 config NETFILTER_XT_TARGET_HL
460 tristate '"HL" hoplimit target support'
461 depends on IP_NF_MANGLE || IP6_NF_MANGLE
462 depends on NETFILTER_ADVANCED
464 This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
465 targets, which enable the user to change the
466 hoplimit/time-to-live value of the IP header.
468 While it is safe to decrement the hoplimit/TTL value, the
469 modules also allow to increment and set the hoplimit value of
470 the header to arbitrary values. This is EXTREMELY DANGEROUS
471 since you can easily create immortal packets that loop
472 forever on the network.
474 config NETFILTER_XT_TARGET_IDLETIMER
475 tristate "IDLETIMER target support"
476 depends on NETFILTER_ADVANCED
479 This option adds the `IDLETIMER' target. Each matching packet
480 resets the timer associated with label specified when the rule is
481 added. When the timer expires, it triggers a sysfs notification.
482 The remaining time for expiration can be read via sysfs.
484 To compile it as a module, choose M here. If unsure, say N.
486 config NETFILTER_XT_TARGET_LED
487 tristate '"LED" target support'
488 depends on LEDS_CLASS && LEDS_TRIGGERS
489 depends on NETFILTER_ADVANCED
491 This option adds a `LED' target, which allows you to blink LEDs in
492 response to particular packets passing through your machine.
494 This can be used to turn a spare LED into a network activity LED,
495 which only flashes in response to FTP transfers, for example. Or
496 you could have an LED which lights up for a minute or two every time
497 somebody connects to your machine via SSH.
499 You will need support for the "led" class to make this work.
501 To create an LED trigger for incoming SSH traffic:
502 iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
504 Then attach the new trigger to an LED on your system:
505 echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
507 For more information on the LEDs available on your system, see
508 Documentation/leds-class.txt
510 config NETFILTER_XT_TARGET_MARK
511 tristate '"MARK" target support'
512 depends on NETFILTER_ADVANCED
513 select NETFILTER_XT_MARK
515 This is a backwards-compat option for the user's convenience
516 (e.g. when running oldconfig). It selects
517 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
519 config NETFILTER_XT_TARGET_NFLOG
520 tristate '"NFLOG" target support'
521 default m if NETFILTER_ADVANCED=n
522 select NETFILTER_NETLINK_LOG
524 This option enables the NFLOG target, which allows to LOG
525 messages through nfnetlink_log.
527 To compile it as a module, choose M here. If unsure, say N.
529 config NETFILTER_XT_TARGET_NFQUEUE
530 tristate '"NFQUEUE" target Support'
531 depends on NETFILTER_ADVANCED
532 select NETFILTER_NETLINK_QUEUE
534 This target replaced the old obsolete QUEUE target.
536 As opposed to QUEUE, it supports 65535 different queues,
539 To compile it as a module, choose M here. If unsure, say N.
541 config NETFILTER_XT_TARGET_NOTRACK
542 tristate '"NOTRACK" target support'
543 depends on IP_NF_RAW || IP6_NF_RAW
544 depends on NF_CONNTRACK
545 depends on NETFILTER_ADVANCED
547 The NOTRACK target allows a select rule to specify
548 which packets *not* to enter the conntrack/NAT
549 subsystem with all the consequences (no ICMP error tracking,
550 no protocol helpers for the selected packets).
552 If you want to compile it as a module, say M here and read
553 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
555 config NETFILTER_XT_TARGET_RATEEST
556 tristate '"RATEEST" target support'
557 depends on NETFILTER_ADVANCED
559 This option adds a `RATEEST' target, which allows to measure
560 rates similar to TC estimators. The `rateest' match can be
561 used to match on the measured rates.
563 To compile it as a module, choose M here. If unsure, say N.
565 config NETFILTER_XT_TARGET_TEE
566 tristate '"TEE" - packet cloning to alternate destination'
567 depends on NETFILTER_ADVANCED
568 depends on (IPV6 || IPV6=n)
569 depends on !NF_CONNTRACK || NF_CONNTRACK
571 This option adds a "TEE" target with which a packet can be cloned and
572 this clone be rerouted to another nexthop.
574 config NETFILTER_XT_TARGET_TPROXY
575 tristate '"TPROXY" target support (EXPERIMENTAL)'
576 depends on EXPERIMENTAL
577 depends on NETFILTER_TPROXY
578 depends on NETFILTER_XTABLES
579 depends on NETFILTER_ADVANCED
580 select NF_DEFRAG_IPV4
581 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
583 This option adds a `TPROXY' target, which is somewhat similar to
584 REDIRECT. It can only be used in the mangle table and is useful
585 to redirect traffic to a transparent proxy. It does _not_ depend
586 on Netfilter connection tracking and NAT, unlike REDIRECT.
588 To compile it as a module, choose M here. If unsure, say N.
590 config NETFILTER_XT_TARGET_TRACE
591 tristate '"TRACE" target support'
592 depends on IP_NF_RAW || IP6_NF_RAW
593 depends on NETFILTER_ADVANCED
595 The TRACE target allows you to mark packets so that the kernel
596 will log every rule which match the packets as those traverse
597 the tables, chains, rules.
599 If you want to compile it as a module, say M here and read
600 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
602 config NETFILTER_XT_TARGET_SECMARK
603 tristate '"SECMARK" target support'
604 depends on NETWORK_SECMARK
605 default m if NETFILTER_ADVANCED=n
607 The SECMARK target allows security marking of network
608 packets, for use with security subsystems.
610 To compile it as a module, choose M here. If unsure, say N.
612 config NETFILTER_XT_TARGET_TCPMSS
613 tristate '"TCPMSS" target support'
614 depends on (IPV6 || IPV6=n)
615 default m if NETFILTER_ADVANCED=n
617 This option adds a `TCPMSS' target, which allows you to alter the
618 MSS value of TCP SYN packets, to control the maximum size for that
619 connection (usually limiting it to your outgoing interface's MTU
622 This is used to overcome criminally braindead ISPs or servers which
623 block ICMP Fragmentation Needed packets. The symptoms of this
624 problem are that everything works fine from your Linux
625 firewall/router, but machines behind it can never exchange large
627 1) Web browsers connect, then hang with no data received.
628 2) Small mail works fine, but large emails hang.
629 3) ssh works fine, but scp hangs after initial handshaking.
631 Workaround: activate this option and add a rule to your firewall
634 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
635 -j TCPMSS --clamp-mss-to-pmtu
637 To compile it as a module, choose M here. If unsure, say N.
639 config NETFILTER_XT_TARGET_TCPOPTSTRIP
640 tristate '"TCPOPTSTRIP" target support (EXPERIMENTAL)'
641 depends on EXPERIMENTAL
642 depends on IP_NF_MANGLE || IP6_NF_MANGLE
643 depends on NETFILTER_ADVANCED
645 This option adds a "TCPOPTSTRIP" target, which allows you to strip
646 TCP options from TCP packets.
648 # alphabetically ordered list of matches
650 comment "Xtables matches"
652 config NETFILTER_XT_MATCH_CLUSTER
653 tristate '"cluster" match support'
654 depends on NF_CONNTRACK
655 depends on NETFILTER_ADVANCED
657 This option allows you to build work-load-sharing clusters of
658 network servers/stateful firewalls without having a dedicated
659 load-balancing router/server/switch. Basically, this match returns
660 true when the packet must be handled by this cluster node. Thus,
661 all nodes see all packets and this match decides which node handles
662 what packets. The work-load sharing algorithm is based on source
665 If you say Y or M here, try `iptables -m cluster --help` for
668 config NETFILTER_XT_MATCH_COMMENT
669 tristate '"comment" match support'
670 depends on NETFILTER_ADVANCED
672 This option adds a `comment' dummy-match, which allows you to put
673 comments in your iptables ruleset.
675 If you want to compile it as a module, say M here and read
676 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
678 config NETFILTER_XT_MATCH_CONNBYTES
679 tristate '"connbytes" per-connection counter match support'
680 depends on NF_CONNTRACK
681 depends on NETFILTER_ADVANCED
683 This option adds a `connbytes' match, which allows you to match the
684 number of bytes and/or packets for each direction within a connection.
686 If you want to compile it as a module, say M here and read
687 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
689 config NETFILTER_XT_MATCH_CONNLIMIT
690 tristate '"connlimit" match support"'
691 depends on NF_CONNTRACK
692 depends on NETFILTER_ADVANCED
694 This match allows you to match against the number of parallel
695 connections to a server per client IP address (or address block).
697 config NETFILTER_XT_MATCH_CONNMARK
698 tristate '"connmark" connection mark match support'
699 depends on NF_CONNTRACK
700 depends on NETFILTER_ADVANCED
701 select NETFILTER_XT_CONNMARK
703 This is a backwards-compat option for the user's convenience
704 (e.g. when running oldconfig). It selects
705 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
707 config NETFILTER_XT_MATCH_CONNTRACK
708 tristate '"conntrack" connection tracking match support'
709 depends on NF_CONNTRACK
710 default m if NETFILTER_ADVANCED=n
712 This is a general conntrack match module, a superset of the state match.
714 It allows matching on additional conntrack information, which is
715 useful in complex configurations, such as NAT gateways with multiple
716 internet links or tunnels.
718 To compile it as a module, choose M here. If unsure, say N.
720 config NETFILTER_XT_MATCH_CPU
721 tristate '"cpu" match support'
722 depends on NETFILTER_ADVANCED
724 CPU matching allows you to match packets based on the CPU
725 currently handling the packet.
727 To compile it as a module, choose M here. If unsure, say N.
729 config NETFILTER_XT_MATCH_DCCP
730 tristate '"dccp" protocol match support'
731 depends on NETFILTER_ADVANCED
734 With this option enabled, you will be able to use the iptables
735 `dccp' match in order to match on DCCP source/destination ports
738 If you want to compile it as a module, say M here and read
739 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
741 config NETFILTER_XT_MATCH_DSCP
742 tristate '"dscp" and "tos" match support'
743 depends on NETFILTER_ADVANCED
745 This option adds a `DSCP' match, which allows you to match against
746 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
748 The DSCP field can have any value between 0x0 and 0x3f inclusive.
750 It will also add a "tos" match, which allows you to match packets
751 based on the Type Of Service fields of the IPv4 packet (which share
752 the same bits as DSCP).
754 To compile it as a module, choose M here. If unsure, say N.
756 config NETFILTER_XT_MATCH_ESP
757 tristate '"esp" match support'
758 depends on NETFILTER_ADVANCED
760 This match extension allows you to match a range of SPIs
761 inside ESP header of IPSec packets.
763 To compile it as a module, choose M here. If unsure, say N.
765 config NETFILTER_XT_MATCH_HASHLIMIT
766 tristate '"hashlimit" match support'
767 depends on (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
768 depends on NETFILTER_ADVANCED
770 This option adds a `hashlimit' match.
772 As opposed to `limit', this match dynamically creates a hash table
773 of limit buckets, based on your selection of source/destination
774 addresses and/or ports.
776 It enables you to express policies like `10kpps for any given
777 destination address' or `500pps from any given source address'
780 config NETFILTER_XT_MATCH_HELPER
781 tristate '"helper" match support'
782 depends on NF_CONNTRACK
783 depends on NETFILTER_ADVANCED
785 Helper matching allows you to match packets in dynamic connections
786 tracked by a conntrack-helper, ie. ip_conntrack_ftp
788 To compile it as a module, choose M here. If unsure, say Y.
790 config NETFILTER_XT_MATCH_HL
791 tristate '"hl" hoplimit/TTL match support'
792 depends on NETFILTER_ADVANCED
794 HL matching allows you to match packets based on the hoplimit
795 in the IPv6 header, or the time-to-live field in the IPv4
796 header of the packet.
798 config NETFILTER_XT_MATCH_IPRANGE
799 tristate '"iprange" address range match support'
800 depends on NETFILTER_ADVANCED
802 This option adds a "iprange" match, which allows you to match based on
803 an IP address range. (Normal iptables only matches on single addresses
804 with an optional mask.)
808 config NETFILTER_XT_MATCH_IPVS
809 tristate '"ipvs" match support'
811 depends on NETFILTER_ADVANCED
812 depends on NF_CONNTRACK
814 This option allows you to match against IPVS properties of a packet.
818 config NETFILTER_XT_MATCH_LENGTH
819 tristate '"length" match support'
820 depends on NETFILTER_ADVANCED
822 This option allows you to match the length of a packet against a
823 specific value or range of values.
825 To compile it as a module, choose M here. If unsure, say N.
827 config NETFILTER_XT_MATCH_LIMIT
828 tristate '"limit" match support'
829 depends on NETFILTER_ADVANCED
831 limit matching allows you to control the rate at which a rule can be
832 matched: mainly useful in combination with the LOG target ("LOG
833 target support", below) and to avoid some Denial of Service attacks.
835 To compile it as a module, choose M here. If unsure, say N.
837 config NETFILTER_XT_MATCH_MAC
838 tristate '"mac" address match support'
839 depends on NETFILTER_ADVANCED
841 MAC matching allows you to match packets based on the source
842 Ethernet address of the packet.
844 To compile it as a module, choose M here. If unsure, say N.
846 config NETFILTER_XT_MATCH_MARK
847 tristate '"mark" match support'
848 depends on NETFILTER_ADVANCED
849 select NETFILTER_XT_MARK
851 This is a backwards-compat option for the user's convenience
852 (e.g. when running oldconfig). It selects
853 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
855 config NETFILTER_XT_MATCH_MULTIPORT
856 tristate '"multiport" Multiple port match support'
857 depends on NETFILTER_ADVANCED
859 Multiport matching allows you to match TCP or UDP packets based on
860 a series of source or destination ports: normally a rule can only
861 match a single range of ports.
863 To compile it as a module, choose M here. If unsure, say N.
865 config NETFILTER_XT_MATCH_OSF
866 tristate '"osf" Passive OS fingerprint match'
867 depends on NETFILTER_ADVANCED && NETFILTER_NETLINK
869 This option selects the Passive OS Fingerprinting match module
870 that allows to passively match the remote operating system by
871 analyzing incoming TCP SYN packets.
873 Rules and loading software can be downloaded from
874 http://www.ioremap.net/projects/osf
876 To compile it as a module, choose M here. If unsure, say N.
878 config NETFILTER_XT_MATCH_OWNER
879 tristate '"owner" match support'
880 depends on NETFILTER_ADVANCED
882 Socket owner matching allows you to match locally-generated packets
883 based on who created the socket: the user or group. It is also
884 possible to check whether a socket actually exists.
886 config NETFILTER_XT_MATCH_POLICY
887 tristate 'IPsec "policy" match support'
889 default m if NETFILTER_ADVANCED=n
891 Policy matching allows you to match packets based on the
892 IPsec policy that was used during decapsulation/will
893 be used during encapsulation.
895 To compile it as a module, choose M here. If unsure, say N.
897 config NETFILTER_XT_MATCH_PHYSDEV
898 tristate '"physdev" match support'
899 depends on BRIDGE && BRIDGE_NETFILTER
900 depends on NETFILTER_ADVANCED
902 Physdev packet matching matches against the physical bridge ports
903 the IP packet arrived on or will leave by.
905 To compile it as a module, choose M here. If unsure, say N.
907 config NETFILTER_XT_MATCH_PKTTYPE
908 tristate '"pkttype" packet type match support'
909 depends on NETFILTER_ADVANCED
911 Packet type matching allows you to match a packet by
912 its "class", eg. BROADCAST, MULTICAST, ...
915 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
917 To compile it as a module, choose M here. If unsure, say N.
919 config NETFILTER_XT_MATCH_QUOTA
920 tristate '"quota" match support'
921 depends on NETFILTER_ADVANCED
923 This option adds a `quota' match, which allows to match on a
926 If you want to compile it as a module, say M here and read
927 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
929 config NETFILTER_XT_MATCH_RATEEST
930 tristate '"rateest" match support'
931 depends on NETFILTER_ADVANCED
932 select NETFILTER_XT_TARGET_RATEEST
934 This option adds a `rateest' match, which allows to match on the
935 rate estimated by the RATEEST target.
937 To compile it as a module, choose M here. If unsure, say N.
939 config NETFILTER_XT_MATCH_REALM
940 tristate '"realm" match support'
941 depends on NETFILTER_ADVANCED
942 select IP_ROUTE_CLASSID
944 This option adds a `realm' match, which allows you to use the realm
945 key from the routing subsystem inside iptables.
947 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
950 If you want to compile it as a module, say M here and read
951 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
953 config NETFILTER_XT_MATCH_RECENT
954 tristate '"recent" match support'
955 depends on NETFILTER_ADVANCED
957 This match is used for creating one or many lists of recently
958 used addresses and then matching against that/those list(s).
960 Short options are available by using 'iptables -m recent -h'
961 Official Website: <http://snowman.net/projects/ipt_recent/>
963 config NETFILTER_XT_MATCH_SCTP
964 tristate '"sctp" protocol match support (EXPERIMENTAL)'
965 depends on EXPERIMENTAL
966 depends on NETFILTER_ADVANCED
969 With this option enabled, you will be able to use the
970 `sctp' match in order to match on SCTP source/destination ports
971 and SCTP chunk types.
973 If you want to compile it as a module, say M here and read
974 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
976 config NETFILTER_XT_MATCH_SOCKET
977 tristate '"socket" match support (EXPERIMENTAL)'
978 depends on EXPERIMENTAL
979 depends on NETFILTER_TPROXY
980 depends on NETFILTER_XTABLES
981 depends on NETFILTER_ADVANCED
982 depends on !NF_CONNTRACK || NF_CONNTRACK
983 select NF_DEFRAG_IPV4
984 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
986 This option adds a `socket' match, which can be used to match
987 packets for which a TCP or UDP socket lookup finds a valid socket.
988 It can be used in combination with the MARK target and policy
989 routing to implement full featured non-locally bound sockets.
991 To compile it as a module, choose M here. If unsure, say N.
993 config NETFILTER_XT_MATCH_STATE
994 tristate '"state" match support'
995 depends on NF_CONNTRACK
996 default m if NETFILTER_ADVANCED=n
998 Connection state matching allows you to match packets based on their
999 relationship to a tracked connection (ie. previous packets). This
1000 is a powerful tool for packet classification.
1002 To compile it as a module, choose M here. If unsure, say N.
1004 config NETFILTER_XT_MATCH_STATISTIC
1005 tristate '"statistic" match support'
1006 depends on NETFILTER_ADVANCED
1008 This option adds a `statistic' match, which allows you to match
1009 on packets periodically or randomly with a given percentage.
1011 To compile it as a module, choose M here. If unsure, say N.
1013 config NETFILTER_XT_MATCH_STRING
1014 tristate '"string" match support'
1015 depends on NETFILTER_ADVANCED
1017 select TEXTSEARCH_KMP
1018 select TEXTSEARCH_BM
1019 select TEXTSEARCH_FSM
1021 This option adds a `string' match, which allows you to look for
1022 pattern matchings in packets.
1024 To compile it as a module, choose M here. If unsure, say N.
1026 config NETFILTER_XT_MATCH_TCPMSS
1027 tristate '"tcpmss" match support'
1028 depends on NETFILTER_ADVANCED
1030 This option adds a `tcpmss' match, which allows you to examine the
1031 MSS value of TCP SYN packets, which control the maximum packet size
1032 for that connection.
1034 To compile it as a module, choose M here. If unsure, say N.
1036 config NETFILTER_XT_MATCH_TIME
1037 tristate '"time" match support'
1038 depends on NETFILTER_ADVANCED
1040 This option adds a "time" match, which allows you to match based on
1041 the packet arrival time (at the machine which netfilter is running)
1042 on) or departure time/date (for locally generated packets).
1044 If you say Y here, try `iptables -m time --help` for
1047 If you want to compile it as a module, say M here.
1050 config NETFILTER_XT_MATCH_U32
1051 tristate '"u32" match support'
1052 depends on NETFILTER_ADVANCED
1054 u32 allows you to extract quantities of up to 4 bytes from a packet,
1055 AND them with specified masks, shift them by specified amounts and
1056 test whether the results are in any of a set of specified ranges.
1057 The specification of what to extract is general enough to skip over
1058 headers with lengths stored in the packet, as in IP or TCP header
1061 Details and examples are in the kernel module source.
1063 endif # NETFILTER_XTABLES
1067 source "net/netfilter/ipset/Kconfig"
1069 source "net/netfilter/ipvs/Kconfig"