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.
44 bool "Connection tracking flow accounting"
45 depends on NETFILTER_ADVANCED
47 If this option is enabled, the connection tracking code will
48 keep per-flow packet and byte counters.
50 Those counters can be used for flow-based accounting or the
53 Please note that currently this option only sets a default state.
54 You may change it at boot time with nf_conntrack.acct=0/1 kernel
55 parameter or by loading the nf_conntrack module with acct=0/1.
57 You may also disable/enable it on a running system with:
58 sysctl net.netfilter.nf_conntrack_acct=0/1
60 This option will be removed in 2.6.29.
64 config NF_CONNTRACK_MARK
65 bool 'Connection mark tracking support'
66 depends on NETFILTER_ADVANCED
68 This option enables support for connection marks, used by the
69 `CONNMARK' target and `connmark' match. Similar to the mark value
70 of packets, but this mark value is kept in the conntrack session
71 instead of the individual packets.
73 config NF_CONNTRACK_SECMARK
74 bool 'Connection tracking security mark support'
75 depends on NETWORK_SECMARK
76 default m if NETFILTER_ADVANCED=n
78 This option enables security markings to be applied to
79 connections. Typically they are copied to connections from
80 packets using the CONNSECMARK target and copied back from
81 connections to packets with the same target, with the packets
82 being originally labeled via SECMARK.
86 config NF_CONNTRACK_ZONES
87 bool 'Connection tracking zones'
88 depends on NETFILTER_ADVANCED
89 depends on NETFILTER_XT_TARGET_CT
91 This option enables support for connection tracking zones.
92 Normally, each connection needs to have a unique system wide
93 identity. Connection tracking zones allow to have multiple
94 connections using the same identity, as long as they are
95 contained in different zones.
99 config NF_CONNTRACK_EVENTS
100 bool "Connection tracking events"
101 depends on NETFILTER_ADVANCED
103 If this option is enabled, the connection tracking code will
104 provide a notifier chain that can be used by other kernel code
105 to get notified about changes in the connection tracking state.
109 config NF_CT_PROTO_DCCP
110 tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)'
111 depends on EXPERIMENTAL
112 depends on NETFILTER_ADVANCED
115 With this option enabled, the layer 3 independent connection
116 tracking code will be able to do state tracking on DCCP connections.
120 config NF_CT_PROTO_GRE
123 config NF_CT_PROTO_SCTP
124 tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
125 depends on EXPERIMENTAL
126 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 SCTP connections.
132 If you want to compile it as a module, say M here and read
133 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
135 config NF_CT_PROTO_UDPLITE
136 tristate 'UDP-Lite protocol connection tracking support'
137 depends on NETFILTER_ADVANCED
139 With this option enabled, the layer 3 independent connection
140 tracking code will be able to do state tracking on UDP-Lite
143 To compile it as a module, choose M here. If unsure, say N.
145 config NF_CONNTRACK_AMANDA
146 tristate "Amanda backup protocol support"
147 depends on NETFILTER_ADVANCED
149 select TEXTSEARCH_KMP
151 If you are running the Amanda backup package <http://www.amanda.org/>
152 on this machine or machines that will be MASQUERADED through this
153 machine, then you may want to enable this feature. This allows the
154 connection tracking and natting code to allow the sub-channels that
155 Amanda requires for communication of the backup data, messages and
158 To compile it as a module, choose M here. If unsure, say N.
160 config NF_CONNTRACK_FTP
161 tristate "FTP protocol support"
162 default m if NETFILTER_ADVANCED=n
164 Tracking FTP connections is problematic: special helpers are
165 required for tracking them, and doing masquerading and other forms
166 of Network Address Translation on them.
168 This is FTP support on Layer 3 independent connection tracking.
169 Layer 3 independent connection tracking is experimental scheme
170 which generalize ip_conntrack to support other layer 3 protocols.
172 To compile it as a module, choose M here. If unsure, say N.
174 config NF_CONNTRACK_H323
175 tristate "H.323 protocol support"
176 depends on (IPV6 || IPV6=n)
177 depends on NETFILTER_ADVANCED
179 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
180 important VoIP protocols, it is widely used by voice hardware and
181 software including voice gateways, IP phones, Netmeeting, OpenPhone,
184 With this module you can support H.323 on a connection tracking/NAT
187 This module supports RAS, Fast Start, H.245 Tunnelling, Call
188 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
189 whiteboard, file transfer, etc. For more information, please
190 visit http://nath323.sourceforge.net/.
192 To compile it as a module, choose M here. If unsure, say N.
194 config NF_CONNTRACK_IRC
195 tristate "IRC protocol support"
196 default m if NETFILTER_ADVANCED=n
198 There is a commonly-used extension to IRC called
199 Direct Client-to-Client Protocol (DCC). This enables users to send
200 files to each other, and also chat to each other without the need
201 of a server. DCC Sending is used anywhere you send files over IRC,
202 and DCC Chat is most commonly used by Eggdrop bots. If you are
203 using NAT, this extension will enable you to send files and initiate
204 chats. Note that you do NOT need this extension to get files or
205 have others initiate chats, or everything else in IRC.
207 To compile it as a module, choose M here. If unsure, say N.
209 config NF_CONNTRACK_NETBIOS_NS
210 tristate "NetBIOS name service protocol support"
211 depends on NETFILTER_ADVANCED
213 NetBIOS name service requests are sent as broadcast messages from an
214 unprivileged port and responded to with unicast messages to the
215 same port. This make them hard to firewall properly because connection
216 tracking doesn't deal with broadcasts. This helper tracks locally
217 originating NetBIOS name service requests and the corresponding
218 responses. It relies on correct IP address configuration, specifically
219 netmask and broadcast address. When properly configured, the output
220 of "ip address show" should look similar to this:
222 $ ip -4 address show eth0
223 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
224 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
226 To compile it as a module, choose M here. If unsure, say N.
228 config NF_CONNTRACK_PPTP
229 tristate "PPtP protocol support"
230 depends on NETFILTER_ADVANCED
231 select NF_CT_PROTO_GRE
233 This module adds support for PPTP (Point to Point Tunnelling
234 Protocol, RFC2637) connection tracking and NAT.
236 If you are running PPTP sessions over a stateful firewall or NAT
237 box, you may want to enable this feature.
239 Please note that not all PPTP modes of operation are supported yet.
240 Specifically these limitations exist:
241 - Blindly assumes that control connections are always established
242 in PNS->PAC direction. This is a violation of RFC2637.
243 - Only supports a single call within each session
245 To compile it as a module, choose M here. If unsure, say N.
247 config NF_CONNTRACK_SANE
248 tristate "SANE protocol support (EXPERIMENTAL)"
249 depends on EXPERIMENTAL
250 depends on NETFILTER_ADVANCED
252 SANE is a protocol for remote access to scanners as implemented
253 by the 'saned' daemon. Like FTP, it uses separate control and
256 With this module you can support SANE on a connection tracking
259 To compile it as a module, choose M here. If unsure, say N.
261 config NF_CONNTRACK_SIP
262 tristate "SIP protocol support"
263 default m if NETFILTER_ADVANCED=n
265 SIP is an application-layer control protocol that can establish,
266 modify, and terminate multimedia sessions (conferences) such as
267 Internet telephony calls. With the ip_conntrack_sip and
268 the nf_nat_sip modules you can support the protocol on a connection
269 tracking/NATing firewall.
271 To compile it as a module, choose M here. If unsure, say N.
273 config NF_CONNTRACK_TFTP
274 tristate "TFTP protocol support"
275 depends on NETFILTER_ADVANCED
277 TFTP connection tracking helper, this is required depending
278 on how restrictive your ruleset is.
279 If you are using a tftp client behind -j SNAT or -j MASQUERADING
282 To compile it as a module, choose M here. If unsure, say N.
285 tristate 'Connection tracking netlink interface'
286 select NETFILTER_NETLINK
287 default m if NETFILTER_ADVANCED=n
289 This option enables support for a netlink-based userspace interface
293 # transparent proxy support
294 config NETFILTER_TPROXY
295 tristate "Transparent proxying support (EXPERIMENTAL)"
296 depends on EXPERIMENTAL
297 depends on IP_NF_MANGLE
298 depends on NETFILTER_ADVANCED
300 This option enables transparent proxying support, that is,
301 support for handling non-locally bound IPv4 TCP and UDP sockets.
302 For it to work you will have to configure certain iptables rules
303 and use policy routing. For more information on how to set it up
304 see Documentation/networking/tproxy.txt.
306 To compile it as a module, choose M here. If unsure, say N.
308 config NETFILTER_XTABLES
309 tristate "Netfilter Xtables support (required for ip_tables)"
310 default m if NETFILTER_ADVANCED=n
312 This is required if you intend to use any of ip_tables,
313 ip6_tables or arp_tables.
317 # alphabetically ordered list of targets
319 config NETFILTER_XT_TARGET_CLASSIFY
320 tristate '"CLASSIFY" target support'
321 depends on NETFILTER_ADVANCED
323 This option adds a `CLASSIFY' target, which enables the user to set
324 the priority of a packet. Some qdiscs can use this value for
325 classification, among these are:
327 atm, cbq, dsmark, pfifo_fast, htb, prio
329 To compile it as a module, choose M here. If unsure, say N.
331 config NETFILTER_XT_TARGET_CONNMARK
332 tristate '"CONNMARK" target support'
333 depends on NF_CONNTRACK
334 depends on NETFILTER_ADVANCED
335 select NF_CONNTRACK_MARK
337 This option adds a `CONNMARK' target, which allows one to manipulate
338 the connection mark value. Similar to the MARK target, but
339 affects the connection mark value rather than the packet mark value.
341 If you want to compile it as a module, say M here and read
342 <file:Documentation/kbuild/modules.txt>. The module will be called
343 ipt_CONNMARK. If unsure, say `N'.
345 config NETFILTER_XT_TARGET_CONNSECMARK
346 tristate '"CONNSECMARK" target support'
347 depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
348 default m if NETFILTER_ADVANCED=n
350 The CONNSECMARK target copies security markings from packets
351 to connections, and restores security markings from connections
352 to packets (if the packets are not already marked). This would
353 normally be used in conjunction with the SECMARK target.
355 To compile it as a module, choose M here. If unsure, say N.
357 config NETFILTER_XT_TARGET_CT
358 tristate '"CT" target support'
359 depends on NF_CONNTRACK
360 depends on IP_NF_RAW || IP6_NF_RAW
361 depends on NETFILTER_ADVANCED
363 This options adds a `CT' target, which allows to specify initial
364 connection tracking parameters like events to be delivered and
365 the helper to be used.
367 To compile it as a module, choose M here. If unsure, say N.
369 config NETFILTER_XT_TARGET_DSCP
370 tristate '"DSCP" and "TOS" target support'
371 depends on IP_NF_MANGLE || IP6_NF_MANGLE
372 depends on NETFILTER_ADVANCED
374 This option adds a `DSCP' target, which allows you to manipulate
375 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
377 The DSCP field can have any value between 0x0 and 0x3f inclusive.
379 It also adds the "TOS" target, which allows you to create rules in
380 the "mangle" table which alter the Type Of Service field of an IPv4
381 or the Priority field of an IPv6 packet, prior to routing.
383 To compile it as a module, choose M here. If unsure, say N.
385 config NETFILTER_XT_TARGET_HL
386 tristate '"HL" hoplimit target support'
387 depends on IP_NF_MANGLE || IP6_NF_MANGLE
388 depends on NETFILTER_ADVANCED
390 This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
391 targets, which enable the user to change the
392 hoplimit/time-to-live value of the IP header.
394 While it is safe to decrement the hoplimit/TTL value, the
395 modules also allow to increment and set the hoplimit value of
396 the header to arbitrary values. This is EXTREMELY DANGEROUS
397 since you can easily create immortal packets that loop
398 forever on the network.
400 config NETFILTER_XT_TARGET_LED
401 tristate '"LED" target support'
402 depends on LEDS_CLASS && LEDS_TRIGGERS
403 depends on NETFILTER_ADVANCED
405 This option adds a `LED' target, which allows you to blink LEDs in
406 response to particular packets passing through your machine.
408 This can be used to turn a spare LED into a network activity LED,
409 which only flashes in response to FTP transfers, for example. Or
410 you could have an LED which lights up for a minute or two every time
411 somebody connects to your machine via SSH.
413 You will need support for the "led" class to make this work.
415 To create an LED trigger for incoming SSH traffic:
416 iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
418 Then attach the new trigger to an LED on your system:
419 echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
421 For more information on the LEDs available on your system, see
422 Documentation/leds-class.txt
424 config NETFILTER_XT_TARGET_MARK
425 tristate '"MARK" target support'
426 default m if NETFILTER_ADVANCED=n
428 This option adds a `MARK' target, which allows you to create rules
429 in the `mangle' table which alter the netfilter mark (nfmark) field
430 associated with the packet prior to routing. This can change
431 the routing method (see `Use netfilter MARK value as routing
432 key') and can also be used by other subsystems to change their
435 To compile it as a module, choose M here. If unsure, say N.
437 config NETFILTER_XT_TARGET_NFLOG
438 tristate '"NFLOG" target support'
439 default m if NETFILTER_ADVANCED=n
440 select NETFILTER_NETLINK_LOG
442 This option enables the NFLOG target, which allows to LOG
443 messages through nfnetlink_log.
445 To compile it as a module, choose M here. If unsure, say N.
447 config NETFILTER_XT_TARGET_NFQUEUE
448 tristate '"NFQUEUE" target Support'
449 depends on NETFILTER_ADVANCED
451 This target replaced the old obsolete QUEUE target.
453 As opposed to QUEUE, it supports 65535 different queues,
456 To compile it as a module, choose M here. If unsure, say N.
458 config NETFILTER_XT_TARGET_NOTRACK
459 tristate '"NOTRACK" target support'
460 depends on IP_NF_RAW || IP6_NF_RAW
461 depends on NF_CONNTRACK
462 depends on NETFILTER_ADVANCED
464 The NOTRACK target allows a select rule to specify
465 which packets *not* to enter the conntrack/NAT
466 subsystem with all the consequences (no ICMP error tracking,
467 no protocol helpers for the selected packets).
469 If you want to compile it as a module, say M here and read
470 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
472 config NETFILTER_XT_TARGET_RATEEST
473 tristate '"RATEEST" target support'
474 depends on NETFILTER_ADVANCED
476 This option adds a `RATEEST' target, which allows to measure
477 rates similar to TC estimators. The `rateest' match can be
478 used to match on the measured rates.
480 To compile it as a module, choose M here. If unsure, say N.
482 config NETFILTER_XT_TARGET_TPROXY
483 tristate '"TPROXY" target support (EXPERIMENTAL)'
484 depends on EXPERIMENTAL
485 depends on NETFILTER_TPROXY
486 depends on NETFILTER_XTABLES
487 depends on NETFILTER_ADVANCED
488 select NF_DEFRAG_IPV4
490 This option adds a `TPROXY' target, which is somewhat similar to
491 REDIRECT. It can only be used in the mangle table and is useful
492 to redirect traffic to a transparent proxy. It does _not_ depend
493 on Netfilter connection tracking and NAT, unlike REDIRECT.
495 To compile it as a module, choose M here. If unsure, say N.
497 config NETFILTER_XT_TARGET_TRACE
498 tristate '"TRACE" target support'
499 depends on IP_NF_RAW || IP6_NF_RAW
500 depends on NETFILTER_ADVANCED
502 The TRACE target allows you to mark packets so that the kernel
503 will log every rule which match the packets as those traverse
504 the tables, chains, rules.
506 If you want to compile it as a module, say M here and read
507 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
509 config NETFILTER_XT_TARGET_SECMARK
510 tristate '"SECMARK" target support'
511 depends on NETWORK_SECMARK
512 default m if NETFILTER_ADVANCED=n
514 The SECMARK target allows security marking of network
515 packets, for use with security subsystems.
517 To compile it as a module, choose M here. If unsure, say N.
519 config NETFILTER_XT_TARGET_TCPMSS
520 tristate '"TCPMSS" target support'
521 depends on (IPV6 || IPV6=n)
522 default m if NETFILTER_ADVANCED=n
524 This option adds a `TCPMSS' target, which allows you to alter the
525 MSS value of TCP SYN packets, to control the maximum size for that
526 connection (usually limiting it to your outgoing interface's MTU
529 This is used to overcome criminally braindead ISPs or servers which
530 block ICMP Fragmentation Needed packets. The symptoms of this
531 problem are that everything works fine from your Linux
532 firewall/router, but machines behind it can never exchange large
534 1) Web browsers connect, then hang with no data received.
535 2) Small mail works fine, but large emails hang.
536 3) ssh works fine, but scp hangs after initial handshaking.
538 Workaround: activate this option and add a rule to your firewall
541 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
542 -j TCPMSS --clamp-mss-to-pmtu
544 To compile it as a module, choose M here. If unsure, say N.
546 config NETFILTER_XT_TARGET_TCPOPTSTRIP
547 tristate '"TCPOPTSTRIP" target support (EXPERIMENTAL)'
548 depends on EXPERIMENTAL
549 depends on IP_NF_MANGLE || IP6_NF_MANGLE
550 depends on NETFILTER_ADVANCED
552 This option adds a "TCPOPTSTRIP" target, which allows you to strip
553 TCP options from TCP packets.
555 config NETFILTER_XT_MATCH_CLUSTER
556 tristate '"cluster" match support'
557 depends on NF_CONNTRACK
558 depends on NETFILTER_ADVANCED
560 This option allows you to build work-load-sharing clusters of
561 network servers/stateful firewalls without having a dedicated
562 load-balancing router/server/switch. Basically, this match returns
563 true when the packet must be handled by this cluster node. Thus,
564 all nodes see all packets and this match decides which node handles
565 what packets. The work-load sharing algorithm is based on source
568 If you say Y or M here, try `iptables -m cluster --help` for
571 config NETFILTER_XT_MATCH_COMMENT
572 tristate '"comment" match support'
573 depends on NETFILTER_ADVANCED
575 This option adds a `comment' dummy-match, which allows you to put
576 comments in your iptables ruleset.
578 If you want to compile it as a module, say M here and read
579 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
581 config NETFILTER_XT_MATCH_CONNBYTES
582 tristate '"connbytes" per-connection counter match support'
583 depends on NF_CONNTRACK
584 depends on NETFILTER_ADVANCED
587 This option adds a `connbytes' match, which allows you to match the
588 number of bytes and/or packets for each direction within a connection.
590 If you want to compile it as a module, say M here and read
591 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
593 config NETFILTER_XT_MATCH_CONNLIMIT
594 tristate '"connlimit" match support"'
595 depends on NF_CONNTRACK
596 depends on NETFILTER_ADVANCED
598 This match allows you to match against the number of parallel
599 connections to a server per client IP address (or address block).
601 config NETFILTER_XT_MATCH_CONNMARK
602 tristate '"connmark" connection mark match support'
603 depends on NF_CONNTRACK
604 depends on NETFILTER_ADVANCED
605 select NF_CONNTRACK_MARK
607 This option adds a `connmark' match, which allows you to match the
608 connection mark value previously set for the session by `CONNMARK'.
610 If you want to compile it as a module, say M here and read
611 <file:Documentation/kbuild/modules.txt>. The module will be called
612 ipt_connmark. If unsure, say `N'.
614 config NETFILTER_XT_MATCH_CONNTRACK
615 tristate '"conntrack" connection tracking match support'
616 depends on NF_CONNTRACK
617 default m if NETFILTER_ADVANCED=n
619 This is a general conntrack match module, a superset of the state match.
621 It allows matching on additional conntrack information, which is
622 useful in complex configurations, such as NAT gateways with multiple
623 internet links or tunnels.
625 To compile it as a module, choose M here. If unsure, say N.
627 config NETFILTER_XT_MATCH_DCCP
628 tristate '"dccp" protocol match support'
629 depends on NETFILTER_ADVANCED
632 With this option enabled, you will be able to use the iptables
633 `dccp' match in order to match on DCCP source/destination ports
636 If you want to compile it as a module, say M here and read
637 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
639 config NETFILTER_XT_MATCH_DSCP
640 tristate '"dscp" and "tos" match support'
641 depends on NETFILTER_ADVANCED
643 This option adds a `DSCP' match, which allows you to match against
644 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
646 The DSCP field can have any value between 0x0 and 0x3f inclusive.
648 It will also add a "tos" match, which allows you to match packets
649 based on the Type Of Service fields of the IPv4 packet (which share
650 the same bits as DSCP).
652 To compile it as a module, choose M here. If unsure, say N.
654 config NETFILTER_XT_MATCH_ESP
655 tristate '"esp" match support'
656 depends on NETFILTER_ADVANCED
658 This match extension allows you to match a range of SPIs
659 inside ESP header of IPSec packets.
661 To compile it as a module, choose M here. If unsure, say N.
663 config NETFILTER_XT_MATCH_HASHLIMIT
664 tristate '"hashlimit" match support'
665 depends on (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
666 depends on NETFILTER_ADVANCED
668 This option adds a `hashlimit' match.
670 As opposed to `limit', this match dynamically creates a hash table
671 of limit buckets, based on your selection of source/destination
672 addresses and/or ports.
674 It enables you to express policies like `10kpps for any given
675 destination address' or `500pps from any given source address'
678 config NETFILTER_XT_MATCH_HELPER
679 tristate '"helper" match support'
680 depends on NF_CONNTRACK
681 depends on NETFILTER_ADVANCED
683 Helper matching allows you to match packets in dynamic connections
684 tracked by a conntrack-helper, ie. ip_conntrack_ftp
686 To compile it as a module, choose M here. If unsure, say Y.
688 config NETFILTER_XT_MATCH_HL
689 tristate '"hl" hoplimit/TTL match support'
690 depends on NETFILTER_ADVANCED
692 HL matching allows you to match packets based on the hoplimit
693 in the IPv6 header, or the time-to-live field in the IPv4
694 header of the packet.
696 config NETFILTER_XT_MATCH_IPRANGE
697 tristate '"iprange" address range match support'
698 depends on NETFILTER_ADVANCED
700 This option adds a "iprange" match, which allows you to match based on
701 an IP address range. (Normal iptables only matches on single addresses
702 with an optional mask.)
706 config NETFILTER_XT_MATCH_LENGTH
707 tristate '"length" match support'
708 depends on NETFILTER_ADVANCED
710 This option allows you to match the length of a packet against a
711 specific value or range of values.
713 To compile it as a module, choose M here. If unsure, say N.
715 config NETFILTER_XT_MATCH_LIMIT
716 tristate '"limit" match support'
717 depends on NETFILTER_ADVANCED
719 limit matching allows you to control the rate at which a rule can be
720 matched: mainly useful in combination with the LOG target ("LOG
721 target support", below) and to avoid some Denial of Service attacks.
723 To compile it as a module, choose M here. If unsure, say N.
725 config NETFILTER_XT_MATCH_MAC
726 tristate '"mac" address match support'
727 depends on NETFILTER_ADVANCED
729 MAC matching allows you to match packets based on the source
730 Ethernet address of the packet.
732 To compile it as a module, choose M here. If unsure, say N.
734 config NETFILTER_XT_MATCH_MARK
735 tristate '"mark" match support'
736 default m if NETFILTER_ADVANCED=n
738 Netfilter mark matching allows you to match packets based on the
739 `nfmark' value in the packet. This can be set by the MARK target
742 To compile it as a module, choose M here. If unsure, say N.
744 config NETFILTER_XT_MATCH_MULTIPORT
745 tristate '"multiport" Multiple port match support'
746 depends on NETFILTER_ADVANCED
748 Multiport matching allows you to match TCP or UDP packets based on
749 a series of source or destination ports: normally a rule can only
750 match a single range of ports.
752 To compile it as a module, choose M here. If unsure, say N.
754 config NETFILTER_XT_MATCH_OWNER
755 tristate '"owner" match support'
756 depends on NETFILTER_ADVANCED
758 Socket owner matching allows you to match locally-generated packets
759 based on who created the socket: the user or group. It is also
760 possible to check whether a socket actually exists.
762 config NETFILTER_XT_MATCH_POLICY
763 tristate 'IPsec "policy" match support'
765 default m if NETFILTER_ADVANCED=n
767 Policy matching allows you to match packets based on the
768 IPsec policy that was used during decapsulation/will
769 be used during encapsulation.
771 To compile it as a module, choose M here. If unsure, say N.
773 config NETFILTER_XT_MATCH_PHYSDEV
774 tristate '"physdev" match support'
775 depends on BRIDGE && BRIDGE_NETFILTER
776 depends on NETFILTER_ADVANCED
778 Physdev packet matching matches against the physical bridge ports
779 the IP packet arrived on or will leave by.
781 To compile it as a module, choose M here. If unsure, say N.
783 config NETFILTER_XT_MATCH_PKTTYPE
784 tristate '"pkttype" packet type match support'
785 depends on NETFILTER_ADVANCED
787 Packet type matching allows you to match a packet by
788 its "class", eg. BROADCAST, MULTICAST, ...
791 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
793 To compile it as a module, choose M here. If unsure, say N.
795 config NETFILTER_XT_MATCH_QUOTA
796 tristate '"quota" match support'
797 depends on NETFILTER_ADVANCED
799 This option adds a `quota' match, which allows to match on a
802 If you want to compile it as a module, say M here and read
803 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
805 config NETFILTER_XT_MATCH_RATEEST
806 tristate '"rateest" match support'
807 depends on NETFILTER_ADVANCED
808 select NETFILTER_XT_TARGET_RATEEST
810 This option adds a `rateest' match, which allows to match on the
811 rate estimated by the RATEEST target.
813 To compile it as a module, choose M here. If unsure, say N.
815 config NETFILTER_XT_MATCH_REALM
816 tristate '"realm" match support'
817 depends on NETFILTER_ADVANCED
820 This option adds a `realm' match, which allows you to use the realm
821 key from the routing subsystem inside iptables.
823 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
826 If you want to compile it as a module, say M here and read
827 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
829 config NETFILTER_XT_MATCH_RECENT
830 tristate '"recent" match support'
831 depends on NETFILTER_ADVANCED
833 This match is used for creating one or many lists of recently
834 used addresses and then matching against that/those list(s).
836 Short options are available by using 'iptables -m recent -h'
837 Official Website: <http://snowman.net/projects/ipt_recent/>
839 config NETFILTER_XT_MATCH_RECENT_PROC_COMPAT
840 bool 'Enable obsolete /proc/net/ipt_recent'
841 depends on NETFILTER_XT_MATCH_RECENT && PROC_FS
843 This option enables the old /proc/net/ipt_recent interface,
844 which has been obsoleted by /proc/net/xt_recent.
846 config NETFILTER_XT_MATCH_SCTP
847 tristate '"sctp" protocol match support (EXPERIMENTAL)'
848 depends on EXPERIMENTAL
849 depends on NETFILTER_ADVANCED
852 With this option enabled, you will be able to use the
853 `sctp' match in order to match on SCTP source/destination ports
854 and SCTP chunk types.
856 If you want to compile it as a module, say M here and read
857 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
859 config NETFILTER_XT_MATCH_SOCKET
860 tristate '"socket" match support (EXPERIMENTAL)'
861 depends on EXPERIMENTAL
862 depends on NETFILTER_TPROXY
863 depends on NETFILTER_XTABLES
864 depends on NETFILTER_ADVANCED
865 depends on !NF_CONNTRACK || NF_CONNTRACK
866 select NF_DEFRAG_IPV4
868 This option adds a `socket' match, which can be used to match
869 packets for which a TCP or UDP socket lookup finds a valid socket.
870 It can be used in combination with the MARK target and policy
871 routing to implement full featured non-locally bound sockets.
873 To compile it as a module, choose M here. If unsure, say N.
875 config NETFILTER_XT_MATCH_STATE
876 tristate '"state" match support'
877 depends on NF_CONNTRACK
878 default m if NETFILTER_ADVANCED=n
880 Connection state matching allows you to match packets based on their
881 relationship to a tracked connection (ie. previous packets). This
882 is a powerful tool for packet classification.
884 To compile it as a module, choose M here. If unsure, say N.
886 config NETFILTER_XT_MATCH_STATISTIC
887 tristate '"statistic" match support'
888 depends on NETFILTER_ADVANCED
890 This option adds a `statistic' match, which allows you to match
891 on packets periodically or randomly with a given percentage.
893 To compile it as a module, choose M here. If unsure, say N.
895 config NETFILTER_XT_MATCH_STRING
896 tristate '"string" match support'
897 depends on NETFILTER_ADVANCED
899 select TEXTSEARCH_KMP
901 select TEXTSEARCH_FSM
903 This option adds a `string' match, which allows you to look for
904 pattern matchings in packets.
906 To compile it as a module, choose M here. If unsure, say N.
908 config NETFILTER_XT_MATCH_TCPMSS
909 tristate '"tcpmss" match support'
910 depends on NETFILTER_ADVANCED
912 This option adds a `tcpmss' match, which allows you to examine the
913 MSS value of TCP SYN packets, which control the maximum packet size
916 To compile it as a module, choose M here. If unsure, say N.
918 config NETFILTER_XT_MATCH_TIME
919 tristate '"time" match support'
920 depends on NETFILTER_ADVANCED
922 This option adds a "time" match, which allows you to match based on
923 the packet arrival time (at the machine which netfilter is running)
924 on) or departure time/date (for locally generated packets).
926 If you say Y here, try `iptables -m time --help` for
929 If you want to compile it as a module, say M here.
932 config NETFILTER_XT_MATCH_U32
933 tristate '"u32" match support'
934 depends on NETFILTER_ADVANCED
936 u32 allows you to extract quantities of up to 4 bytes from a packet,
937 AND them with specified masks, shift them by specified amounts and
938 test whether the results are in any of a set of specified ranges.
939 The specification of what to extract is general enough to skip over
940 headers with lengths stored in the packet, as in IP or TCP header
943 Details and examples are in the kernel module source.
945 config NETFILTER_XT_MATCH_OSF
946 tristate '"osf" Passive OS fingerprint match'
947 depends on NETFILTER_ADVANCED && NETFILTER_NETLINK
949 This option selects the Passive OS Fingerprinting match module
950 that allows to passively match the remote operating system by
951 analyzing incoming TCP SYN packets.
953 Rules and loading software can be downloaded from
954 http://www.ioremap.net/projects/osf
956 To compile it as a module, choose M here. If unsure, say N.
958 endif # NETFILTER_XTABLES
962 source "net/netfilter/ipvs/Kconfig"