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 (except for Fast NAT). It can also be used to
37 enhance packet filtering (see `Connection state match support'
40 To compile it as a module, choose M here. If unsure, say N.
43 bool "Connection tracking flow accounting"
44 depends on NETFILTER_ADVANCED
45 depends on NF_CONNTRACK
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
55 config NF_CONNTRACK_MARK
56 bool 'Connection mark tracking support'
57 depends on NETFILTER_ADVANCED
58 depends on NF_CONNTRACK
60 This option enables support for connection marks, used by the
61 `CONNMARK' target and `connmark' match. Similar to the mark value
62 of packets, but this mark value is kept in the conntrack session
63 instead of the individual packets.
65 config NF_CONNTRACK_SECMARK
66 bool 'Connection tracking security mark support'
67 depends on NF_CONNTRACK && NETWORK_SECMARK
68 default m if NETFILTER_ADVANCED=n
70 This option enables security markings to be applied to
71 connections. Typically they are copied to connections from
72 packets using the CONNSECMARK target and copied back from
73 connections to packets with the same target, with the packets
74 being originally labeled via SECMARK.
78 config NF_CONNTRACK_EVENTS
79 bool "Connection tracking events"
80 depends on NF_CONNTRACK
81 depends on NETFILTER_ADVANCED
83 If this option is enabled, the connection tracking code will
84 provide a notifier chain that can be used by other kernel code
85 to get notified about changes in the connection tracking state.
89 config NF_CT_PROTO_GRE
91 depends on NF_CONNTRACK
93 config NF_CT_PROTO_SCTP
94 tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
95 depends on EXPERIMENTAL && NF_CONNTRACK
96 depends on NETFILTER_ADVANCED
98 With this option enabled, the layer 3 independent connection
99 tracking code will be able to do state tracking on SCTP connections.
101 If you want to compile it as a module, say M here and read
102 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
104 config NF_CT_PROTO_UDPLITE
105 tristate 'UDP-Lite protocol connection tracking support'
106 depends on NF_CONNTRACK
107 depends on NETFILTER_ADVANCED
109 With this option enabled, the layer 3 independent connection
110 tracking code will be able to do state tracking on UDP-Lite
113 To compile it as a module, choose M here. If unsure, say N.
115 config NF_CONNTRACK_AMANDA
116 tristate "Amanda backup protocol support"
117 depends on NF_CONNTRACK
118 depends on NETFILTER_ADVANCED
120 select TEXTSEARCH_KMP
122 If you are running the Amanda backup package <http://www.amanda.org/>
123 on this machine or machines that will be MASQUERADED through this
124 machine, then you may want to enable this feature. This allows the
125 connection tracking and natting code to allow the sub-channels that
126 Amanda requires for communication of the backup data, messages and
129 To compile it as a module, choose M here. If unsure, say N.
131 config NF_CONNTRACK_FTP
132 tristate "FTP protocol support"
133 depends on NF_CONNTRACK
134 default m if NETFILTER_ADVANCED=n
136 Tracking FTP connections is problematic: special helpers are
137 required for tracking them, and doing masquerading and other forms
138 of Network Address Translation on them.
140 This is FTP support on Layer 3 independent connection tracking.
141 Layer 3 independent connection tracking is experimental scheme
142 which generalize ip_conntrack to support other layer 3 protocols.
144 To compile it as a module, choose M here. If unsure, say N.
146 config NF_CONNTRACK_H323
147 tristate "H.323 protocol support"
148 depends on NF_CONNTRACK && (IPV6 || IPV6=n)
149 depends on NETFILTER_ADVANCED
151 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
152 important VoIP protocols, it is widely used by voice hardware and
153 software including voice gateways, IP phones, Netmeeting, OpenPhone,
156 With this module you can support H.323 on a connection tracking/NAT
159 This module supports RAS, Fast Start, H.245 Tunnelling, Call
160 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
161 whiteboard, file transfer, etc. For more information, please
162 visit http://nath323.sourceforge.net/.
164 To compile it as a module, choose M here. If unsure, say N.
166 config NF_CONNTRACK_IRC
167 tristate "IRC protocol support"
168 depends on NF_CONNTRACK
169 default m if NETFILTER_ADVANCED=n
171 There is a commonly-used extension to IRC called
172 Direct Client-to-Client Protocol (DCC). This enables users to send
173 files to each other, and also chat to each other without the need
174 of a server. DCC Sending is used anywhere you send files over IRC,
175 and DCC Chat is most commonly used by Eggdrop bots. If you are
176 using NAT, this extension will enable you to send files and initiate
177 chats. Note that you do NOT need this extension to get files or
178 have others initiate chats, or everything else in IRC.
180 To compile it as a module, choose M here. If unsure, say N.
182 config NF_CONNTRACK_NETBIOS_NS
183 tristate "NetBIOS name service protocol support"
184 depends on NF_CONNTRACK
185 depends on NETFILTER_ADVANCED
187 NetBIOS name service requests are sent as broadcast messages from an
188 unprivileged port and responded to with unicast messages to the
189 same port. This make them hard to firewall properly because connection
190 tracking doesn't deal with broadcasts. This helper tracks locally
191 originating NetBIOS name service requests and the corresponding
192 responses. It relies on correct IP address configuration, specifically
193 netmask and broadcast address. When properly configured, the output
194 of "ip address show" should look similar to this:
196 $ ip -4 address show eth0
197 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
198 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
200 To compile it as a module, choose M here. If unsure, say N.
202 config NF_CONNTRACK_PPTP
203 tristate "PPtP protocol support"
204 depends on NF_CONNTRACK
205 depends on NETFILTER_ADVANCED
206 select NF_CT_PROTO_GRE
208 This module adds support for PPTP (Point to Point Tunnelling
209 Protocol, RFC2637) connection tracking and NAT.
211 If you are running PPTP sessions over a stateful firewall or NAT
212 box, you may want to enable this feature.
214 Please note that not all PPTP modes of operation are supported yet.
215 Specifically these limitations exist:
216 - Blindly assumes that control connections are always established
217 in PNS->PAC direction. This is a violation of RFC2637.
218 - Only supports a single call within each session
220 To compile it as a module, choose M here. If unsure, say N.
222 config NF_CONNTRACK_SANE
223 tristate "SANE protocol support (EXPERIMENTAL)"
224 depends on EXPERIMENTAL && NF_CONNTRACK
225 depends on NETFILTER_ADVANCED
227 SANE is a protocol for remote access to scanners as implemented
228 by the 'saned' daemon. Like FTP, it uses separate control and
231 With this module you can support SANE on a connection tracking
234 To compile it as a module, choose M here. If unsure, say N.
236 config NF_CONNTRACK_SIP
237 tristate "SIP protocol support"
238 depends on NF_CONNTRACK
239 default m if NETFILTER_ADVANCED=n
241 SIP is an application-layer control protocol that can establish,
242 modify, and terminate multimedia sessions (conferences) such as
243 Internet telephony calls. With the ip_conntrack_sip and
244 the nf_nat_sip modules you can support the protocol on a connection
245 tracking/NATing firewall.
247 To compile it as a module, choose M here. If unsure, say N.
249 config NF_CONNTRACK_TFTP
250 tristate "TFTP protocol support"
251 depends on NF_CONNTRACK
252 depends on NETFILTER_ADVANCED
254 TFTP connection tracking helper, this is required depending
255 on how restrictive your ruleset is.
256 If you are using a tftp client behind -j SNAT or -j MASQUERADING
259 To compile it as a module, choose M here. If unsure, say N.
262 tristate 'Connection tracking netlink interface'
263 depends on NF_CONNTRACK
264 select NETFILTER_NETLINK
265 depends on NF_NAT=n || NF_NAT
266 default m if NETFILTER_ADVANCED=n
268 This option enables support for a netlink-based userspace interface
270 config NETFILTER_XTABLES
271 tristate "Netfilter Xtables support (required for ip_tables)"
272 default m if NETFILTER_ADVANCED=n
274 This is required if you intend to use any of ip_tables,
275 ip6_tables or arp_tables.
277 # alphabetically ordered list of targets
279 config NETFILTER_XT_TARGET_CLASSIFY
280 tristate '"CLASSIFY" target support'
281 depends on NETFILTER_XTABLES
282 depends on NETFILTER_ADVANCED
284 This option adds a `CLASSIFY' target, which enables the user to set
285 the priority of a packet. Some qdiscs can use this value for
286 classification, among these are:
288 atm, cbq, dsmark, pfifo_fast, htb, prio
290 To compile it as a module, choose M here. If unsure, say N.
292 config NETFILTER_XT_TARGET_CONNMARK
293 tristate '"CONNMARK" target support'
294 depends on NETFILTER_XTABLES
295 depends on IP_NF_MANGLE || IP6_NF_MANGLE
296 depends on NF_CONNTRACK
297 depends on NETFILTER_ADVANCED
298 select NF_CONNTRACK_MARK
300 This option adds a `CONNMARK' target, which allows one to manipulate
301 the connection mark value. Similar to the MARK target, but
302 affects the connection mark value rather than the packet mark value.
304 If you want to compile it as a module, say M here and read
305 <file:Documentation/kbuild/modules.txt>. The module will be called
306 ipt_CONNMARK.ko. If unsure, say `N'.
308 config NETFILTER_XT_TARGET_DSCP
309 tristate '"DSCP" and "TOS" target support'
310 depends on NETFILTER_XTABLES
311 depends on IP_NF_MANGLE || IP6_NF_MANGLE
312 depends on NETFILTER_ADVANCED
314 This option adds a `DSCP' target, which allows you to manipulate
315 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
317 The DSCP field can have any value between 0x0 and 0x3f inclusive.
319 It also adds the "TOS" target, which allows you to create rules in
320 the "mangle" table which alter the Type Of Service field of an IPv4
321 or the Priority field of an IPv6 packet, prior to routing.
323 To compile it as a module, choose M here. If unsure, say N.
325 config NETFILTER_XT_TARGET_MARK
326 tristate '"MARK" target support'
327 depends on NETFILTER_XTABLES
328 default m if NETFILTER_ADVANCED=n
330 This option adds a `MARK' target, which allows you to create rules
331 in the `mangle' table which alter the netfilter mark (nfmark) field
332 associated with the packet prior to routing. This can change
333 the routing method (see `Use netfilter MARK value as routing
334 key') and can also be used by other subsystems to change their
337 To compile it as a module, choose M here. If unsure, say N.
339 config NETFILTER_XT_TARGET_NFQUEUE
340 tristate '"NFQUEUE" target Support'
341 depends on NETFILTER_XTABLES
342 depends on NETFILTER_ADVANCED
344 This target replaced the old obsolete QUEUE target.
346 As opposed to QUEUE, it supports 65535 different queues,
349 To compile it as a module, choose M here. If unsure, say N.
351 config NETFILTER_XT_TARGET_NFLOG
352 tristate '"NFLOG" target support'
353 depends on NETFILTER_XTABLES
354 default m if NETFILTER_ADVANCED=n
356 This option enables the NFLOG target, which allows to LOG
357 messages through the netfilter logging API, which can use
358 either the old LOG target, the old ULOG target or nfnetlink_log
361 To compile it as a module, choose M here. If unsure, say N.
363 config NETFILTER_XT_TARGET_NOTRACK
364 tristate '"NOTRACK" target support'
365 depends on NETFILTER_XTABLES
366 depends on IP_NF_RAW || IP6_NF_RAW
367 depends on NF_CONNTRACK
368 depends on NETFILTER_ADVANCED
370 The NOTRACK target allows a select rule to specify
371 which packets *not* to enter the conntrack/NAT
372 subsystem with all the consequences (no ICMP error tracking,
373 no protocol helpers for the selected packets).
375 If you want to compile it as a module, say M here and read
376 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
378 config NETFILTER_XT_TARGET_RATEEST
379 tristate '"RATEEST" target support'
380 depends on NETFILTER_XTABLES
381 depends on NETFILTER_ADVANCED
383 This option adds a `RATEEST' target, which allows to measure
384 rates similar to TC estimators. The `rateest' match can be
385 used to match on the measured rates.
387 To compile it as a module, choose M here. If unsure, say N.
389 config NETFILTER_XT_TARGET_TRACE
390 tristate '"TRACE" target support'
391 depends on NETFILTER_XTABLES
392 depends on IP_NF_RAW || IP6_NF_RAW
393 depends on NETFILTER_ADVANCED
395 The TRACE target allows you to mark packets so that the kernel
396 will log every rule which match the packets as those traverse
397 the tables, chains, rules.
399 If you want to compile it as a module, say M here and read
400 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
402 config NETFILTER_XT_TARGET_SECMARK
403 tristate '"SECMARK" target support'
404 depends on NETFILTER_XTABLES && NETWORK_SECMARK
405 default m if NETFILTER_ADVANCED=n
407 The SECMARK target allows security marking of network
408 packets, for use with security subsystems.
410 To compile it as a module, choose M here. If unsure, say N.
412 config NETFILTER_XT_TARGET_CONNSECMARK
413 tristate '"CONNSECMARK" target support'
414 depends on NETFILTER_XTABLES && NF_CONNTRACK && NF_CONNTRACK_SECMARK
415 default m if NETFILTER_ADVANCED=n
417 The CONNSECMARK target copies security markings from packets
418 to connections, and restores security markings from connections
419 to packets (if the packets are not already marked). This would
420 normally be used in conjunction with the SECMARK target.
422 To compile it as a module, choose M here. If unsure, say N.
424 config NETFILTER_XT_TARGET_TCPMSS
425 tristate '"TCPMSS" target support'
426 depends on NETFILTER_XTABLES && (IPV6 || IPV6=n)
427 default m if NETFILTER_ADVANCED=n
429 This option adds a `TCPMSS' target, which allows you to alter the
430 MSS value of TCP SYN packets, to control the maximum size for that
431 connection (usually limiting it to your outgoing interface's MTU
434 This is used to overcome criminally braindead ISPs or servers which
435 block ICMP Fragmentation Needed packets. The symptoms of this
436 problem are that everything works fine from your Linux
437 firewall/router, but machines behind it can never exchange large
439 1) Web browsers connect, then hang with no data received.
440 2) Small mail works fine, but large emails hang.
441 3) ssh works fine, but scp hangs after initial handshaking.
443 Workaround: activate this option and add a rule to your firewall
446 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
447 -j TCPMSS --clamp-mss-to-pmtu
449 To compile it as a module, choose M here. If unsure, say N.
451 config NETFILTER_XT_TARGET_TCPOPTSTRIP
452 tristate '"TCPOPTSTRIP" target support (EXPERIMENTAL)'
453 depends on EXPERIMENTAL && NETFILTER_XTABLES
454 depends on IP_NF_MANGLE || IP6_NF_MANGLE
455 depends on NETFILTER_ADVANCED
457 This option adds a "TCPOPTSTRIP" target, which allows you to strip
458 TCP options from TCP packets.
460 config NETFILTER_XT_MATCH_COMMENT
461 tristate '"comment" match support'
462 depends on NETFILTER_XTABLES
463 depends on NETFILTER_ADVANCED
465 This option adds a `comment' dummy-match, which allows you to put
466 comments in your iptables ruleset.
468 If you want to compile it as a module, say M here and read
469 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
471 config NETFILTER_XT_MATCH_CONNBYTES
472 tristate '"connbytes" per-connection counter match support'
473 depends on NETFILTER_XTABLES
474 depends on NF_CONNTRACK
475 depends on NETFILTER_ADVANCED
478 This option adds a `connbytes' match, which allows you to match the
479 number of bytes and/or packets for each direction within a connection.
481 If you want to compile it as a module, say M here and read
482 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
484 config NETFILTER_XT_MATCH_CONNLIMIT
485 tristate '"connlimit" match support"'
486 depends on NETFILTER_XTABLES
487 depends on NF_CONNTRACK
488 depends on NETFILTER_ADVANCED
490 This match allows you to match against the number of parallel
491 connections to a server per client IP address (or address block).
493 config NETFILTER_XT_MATCH_CONNMARK
494 tristate '"connmark" connection mark match support'
495 depends on NETFILTER_XTABLES
496 depends on NF_CONNTRACK
497 depends on NETFILTER_ADVANCED
498 select NF_CONNTRACK_MARK
500 This option adds a `connmark' match, which allows you to match the
501 connection mark value previously set for the session by `CONNMARK'.
503 If you want to compile it as a module, say M here and read
504 <file:Documentation/kbuild/modules.txt>. The module will be called
505 ipt_connmark.ko. If unsure, say `N'.
507 config NETFILTER_XT_MATCH_CONNTRACK
508 tristate '"conntrack" connection tracking match support'
509 depends on NETFILTER_XTABLES
510 depends on NF_CONNTRACK
511 default m if NETFILTER_ADVANCED=n
513 This is a general conntrack match module, a superset of the state match.
515 It allows matching on additional conntrack information, which is
516 useful in complex configurations, such as NAT gateways with multiple
517 internet links or tunnels.
519 To compile it as a module, choose M here. If unsure, say N.
521 config NETFILTER_XT_MATCH_DCCP
522 tristate '"dccp" protocol match support'
523 depends on NETFILTER_XTABLES
524 depends on NETFILTER_ADVANCED
526 With this option enabled, you will be able to use the iptables
527 `dccp' match in order to match on DCCP source/destination ports
530 If you want to compile it as a module, say M here and read
531 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
533 config NETFILTER_XT_MATCH_DSCP
534 tristate '"dscp" and "tos" match support'
535 depends on NETFILTER_XTABLES
536 depends on NETFILTER_ADVANCED
538 This option adds a `DSCP' match, which allows you to match against
539 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
541 The DSCP field can have any value between 0x0 and 0x3f inclusive.
543 It will also add a "tos" match, which allows you to match packets
544 based on the Type Of Service fields of the IPv4 packet (which share
545 the same bits as DSCP).
547 To compile it as a module, choose M here. If unsure, say N.
549 config NETFILTER_XT_MATCH_ESP
550 tristate '"esp" match support'
551 depends on NETFILTER_XTABLES
552 depends on NETFILTER_ADVANCED
554 This match extension allows you to match a range of SPIs
555 inside ESP header of IPSec packets.
557 To compile it as a module, choose M here. If unsure, say N.
559 config NETFILTER_XT_MATCH_HELPER
560 tristate '"helper" match support'
561 depends on NETFILTER_XTABLES
562 depends on NF_CONNTRACK
563 depends on NETFILTER_ADVANCED
565 Helper matching allows you to match packets in dynamic connections
566 tracked by a conntrack-helper, ie. ip_conntrack_ftp
568 To compile it as a module, choose M here. If unsure, say Y.
570 config NETFILTER_XT_MATCH_IPRANGE
571 tristate '"iprange" address range match support'
572 depends on NETFILTER_XTABLES
573 depends on NETFILTER_ADVANCED
575 This option adds a "iprange" match, which allows you to match based on
576 an IP address range. (Normal iptables only matches on single addresses
577 with an optional mask.)
581 config NETFILTER_XT_MATCH_LENGTH
582 tristate '"length" match support'
583 depends on NETFILTER_XTABLES
584 depends on NETFILTER_ADVANCED
586 This option allows you to match the length of a packet against a
587 specific value or range of values.
589 To compile it as a module, choose M here. If unsure, say N.
591 config NETFILTER_XT_MATCH_LIMIT
592 tristate '"limit" match support'
593 depends on NETFILTER_XTABLES
594 depends on NETFILTER_ADVANCED
596 limit matching allows you to control the rate at which a rule can be
597 matched: mainly useful in combination with the LOG target ("LOG
598 target support", below) and to avoid some Denial of Service attacks.
600 To compile it as a module, choose M here. If unsure, say N.
602 config NETFILTER_XT_MATCH_MAC
603 tristate '"mac" address match support'
604 depends on NETFILTER_XTABLES
605 depends on NETFILTER_ADVANCED
607 MAC matching allows you to match packets based on the source
608 Ethernet address of the packet.
610 To compile it as a module, choose M here. If unsure, say N.
612 config NETFILTER_XT_MATCH_MARK
613 tristate '"mark" match support'
614 depends on NETFILTER_XTABLES
615 default m if NETFILTER_ADVANCED=n
617 Netfilter mark matching allows you to match packets based on the
618 `nfmark' value in the packet. This can be set by the MARK target
621 To compile it as a module, choose M here. If unsure, say N.
623 config NETFILTER_XT_MATCH_OWNER
624 tristate '"owner" match support'
625 depends on NETFILTER_XTABLES
626 depends on NETFILTER_ADVANCED
628 Socket owner matching allows you to match locally-generated packets
629 based on who created the socket: the user or group. It is also
630 possible to check whether a socket actually exists.
632 config NETFILTER_XT_MATCH_POLICY
633 tristate 'IPsec "policy" match support'
634 depends on NETFILTER_XTABLES && XFRM
635 default m if NETFILTER_ADVANCED=n
637 Policy matching allows you to match packets based on the
638 IPsec policy that was used during decapsulation/will
639 be used during encapsulation.
641 To compile it as a module, choose M here. If unsure, say N.
643 config NETFILTER_XT_MATCH_MULTIPORT
644 tristate '"multiport" Multiple port match support'
645 depends on NETFILTER_XTABLES
646 depends on NETFILTER_ADVANCED
648 Multiport matching allows you to match TCP or UDP packets based on
649 a series of source or destination ports: normally a rule can only
650 match a single range of ports.
652 To compile it as a module, choose M here. If unsure, say N.
654 config NETFILTER_XT_MATCH_PHYSDEV
655 tristate '"physdev" match support'
656 depends on NETFILTER_XTABLES && BRIDGE && BRIDGE_NETFILTER
657 depends on NETFILTER_ADVANCED
659 Physdev packet matching matches against the physical bridge ports
660 the IP packet arrived on or will leave by.
662 To compile it as a module, choose M here. If unsure, say N.
664 config NETFILTER_XT_MATCH_PKTTYPE
665 tristate '"pkttype" packet type match support'
666 depends on NETFILTER_XTABLES
667 depends on NETFILTER_ADVANCED
669 Packet type matching allows you to match a packet by
670 its "class", eg. BROADCAST, MULTICAST, ...
673 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
675 To compile it as a module, choose M here. If unsure, say N.
677 config NETFILTER_XT_MATCH_QUOTA
678 tristate '"quota" match support'
679 depends on NETFILTER_XTABLES
680 depends on NETFILTER_ADVANCED
682 This option adds a `quota' match, which allows to match on a
685 If you want to compile it as a module, say M here and read
686 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
688 config NETFILTER_XT_MATCH_RATEEST
689 tristate '"rateest" match support'
690 depends on NETFILTER_XTABLES
691 depends on NETFILTER_ADVANCED
692 select NETFILTER_XT_TARGET_RATEEST
694 This option adds a `rateest' match, which allows to match on the
695 rate estimated by the RATEEST target.
697 To compile it as a module, choose M here. If unsure, say N.
699 config NETFILTER_XT_MATCH_REALM
700 tristate '"realm" match support'
701 depends on NETFILTER_XTABLES
702 depends on NETFILTER_ADVANCED
705 This option adds a `realm' match, which allows you to use the realm
706 key from the routing subsystem inside iptables.
708 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
711 If you want to compile it as a module, say M here and read
712 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
714 config NETFILTER_XT_MATCH_SCTP
715 tristate '"sctp" protocol match support (EXPERIMENTAL)'
716 depends on NETFILTER_XTABLES && EXPERIMENTAL
717 depends on NETFILTER_ADVANCED
719 With this option enabled, you will be able to use the
720 `sctp' match in order to match on SCTP source/destination ports
721 and SCTP chunk types.
723 If you want to compile it as a module, say M here and read
724 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
726 config NETFILTER_XT_MATCH_STATE
727 tristate '"state" match support'
728 depends on NETFILTER_XTABLES
729 depends on NF_CONNTRACK
730 default m if NETFILTER_ADVANCED=n
732 Connection state matching allows you to match packets based on their
733 relationship to a tracked connection (ie. previous packets). This
734 is a powerful tool for packet classification.
736 To compile it as a module, choose M here. If unsure, say N.
738 config NETFILTER_XT_MATCH_STATISTIC
739 tristate '"statistic" match support'
740 depends on NETFILTER_XTABLES
741 depends on NETFILTER_ADVANCED
743 This option adds a `statistic' match, which allows you to match
744 on packets periodically or randomly with a given percentage.
746 To compile it as a module, choose M here. If unsure, say N.
748 config NETFILTER_XT_MATCH_STRING
749 tristate '"string" match support'
750 depends on NETFILTER_XTABLES
751 depends on NETFILTER_ADVANCED
753 select TEXTSEARCH_KMP
755 select TEXTSEARCH_FSM
757 This option adds a `string' match, which allows you to look for
758 pattern matchings in packets.
760 To compile it as a module, choose M here. If unsure, say N.
762 config NETFILTER_XT_MATCH_TCPMSS
763 tristate '"tcpmss" match support'
764 depends on NETFILTER_XTABLES
765 depends on NETFILTER_ADVANCED
767 This option adds a `tcpmss' match, which allows you to examine the
768 MSS value of TCP SYN packets, which control the maximum packet size
771 To compile it as a module, choose M here. If unsure, say N.
773 config NETFILTER_XT_MATCH_TIME
774 tristate '"time" match support'
775 depends on NETFILTER_XTABLES
776 depends on NETFILTER_ADVANCED
778 This option adds a "time" match, which allows you to match based on
779 the packet arrival time (at the machine which netfilter is running)
780 on) or departure time/date (for locally generated packets).
782 If you say Y here, try `iptables -m time --help` for
785 If you want to compile it as a module, say M here.
788 config NETFILTER_XT_MATCH_U32
789 tristate '"u32" match support'
790 depends on NETFILTER_XTABLES
791 depends on NETFILTER_ADVANCED
793 u32 allows you to extract quantities of up to 4 bytes from a packet,
794 AND them with specified masks, shift them by specified amounts and
795 test whether the results are in any of a set of specified ranges.
796 The specification of what to extract is general enough to skip over
797 headers with lengths stored in the packet, as in IP or TCP header
800 Details and examples are in the kernel module source.
802 config NETFILTER_XT_MATCH_HASHLIMIT
803 tristate '"hashlimit" match support'
804 depends on NETFILTER_XTABLES && (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
805 depends on NETFILTER_ADVANCED
807 This option adds a `hashlimit' match.
809 As opposed to `limit', this match dynamically creates a hash table
810 of limit buckets, based on your selection of source/destination
811 addresses and/or ports.
813 It enables you to express policies like `10kpps for any given
814 destination address' or `500pps from any given source address'