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_DCCP
90 tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)'
91 depends on EXPERIMENTAL && NF_CONNTRACK
92 depends on NETFILTER_ADVANCED
94 With this option enabled, the layer 3 independent connection
95 tracking code will be able to do state tracking on DCCP connections.
99 config NF_CT_PROTO_GRE
101 depends on NF_CONNTRACK
103 config NF_CT_PROTO_SCTP
104 tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
105 depends on EXPERIMENTAL && NF_CONNTRACK
106 depends on NETFILTER_ADVANCED
108 With this option enabled, the layer 3 independent connection
109 tracking code will be able to do state tracking on SCTP connections.
111 If you want to compile it as a module, say M here and read
112 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
114 config NF_CT_PROTO_UDPLITE
115 tristate 'UDP-Lite protocol connection tracking support'
116 depends on NF_CONNTRACK
117 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 UDP-Lite
123 To compile it as a module, choose M here. If unsure, say N.
125 config NF_CONNTRACK_AMANDA
126 tristate "Amanda backup protocol support"
127 depends on NF_CONNTRACK
128 depends on NETFILTER_ADVANCED
130 select TEXTSEARCH_KMP
132 If you are running the Amanda backup package <http://www.amanda.org/>
133 on this machine or machines that will be MASQUERADED through this
134 machine, then you may want to enable this feature. This allows the
135 connection tracking and natting code to allow the sub-channels that
136 Amanda requires for communication of the backup data, messages and
139 To compile it as a module, choose M here. If unsure, say N.
141 config NF_CONNTRACK_FTP
142 tristate "FTP protocol support"
143 depends on NF_CONNTRACK
144 default m if NETFILTER_ADVANCED=n
146 Tracking FTP connections is problematic: special helpers are
147 required for tracking them, and doing masquerading and other forms
148 of Network Address Translation on them.
150 This is FTP support on Layer 3 independent connection tracking.
151 Layer 3 independent connection tracking is experimental scheme
152 which generalize ip_conntrack to support other layer 3 protocols.
154 To compile it as a module, choose M here. If unsure, say N.
156 config NF_CONNTRACK_H323
157 tristate "H.323 protocol support"
158 depends on NF_CONNTRACK && (IPV6 || IPV6=n)
159 depends on NETFILTER_ADVANCED
161 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
162 important VoIP protocols, it is widely used by voice hardware and
163 software including voice gateways, IP phones, Netmeeting, OpenPhone,
166 With this module you can support H.323 on a connection tracking/NAT
169 This module supports RAS, Fast Start, H.245 Tunnelling, Call
170 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
171 whiteboard, file transfer, etc. For more information, please
172 visit http://nath323.sourceforge.net/.
174 To compile it as a module, choose M here. If unsure, say N.
176 config NF_CONNTRACK_IRC
177 tristate "IRC protocol support"
178 depends on NF_CONNTRACK
179 default m if NETFILTER_ADVANCED=n
181 There is a commonly-used extension to IRC called
182 Direct Client-to-Client Protocol (DCC). This enables users to send
183 files to each other, and also chat to each other without the need
184 of a server. DCC Sending is used anywhere you send files over IRC,
185 and DCC Chat is most commonly used by Eggdrop bots. If you are
186 using NAT, this extension will enable you to send files and initiate
187 chats. Note that you do NOT need this extension to get files or
188 have others initiate chats, or everything else in IRC.
190 To compile it as a module, choose M here. If unsure, say N.
192 config NF_CONNTRACK_NETBIOS_NS
193 tristate "NetBIOS name service protocol support"
194 depends on NF_CONNTRACK
195 depends on NETFILTER_ADVANCED
197 NetBIOS name service requests are sent as broadcast messages from an
198 unprivileged port and responded to with unicast messages to the
199 same port. This make them hard to firewall properly because connection
200 tracking doesn't deal with broadcasts. This helper tracks locally
201 originating NetBIOS name service requests and the corresponding
202 responses. It relies on correct IP address configuration, specifically
203 netmask and broadcast address. When properly configured, the output
204 of "ip address show" should look similar to this:
206 $ ip -4 address show eth0
207 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
208 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
210 To compile it as a module, choose M here. If unsure, say N.
212 config NF_CONNTRACK_PPTP
213 tristate "PPtP protocol support"
214 depends on NF_CONNTRACK
215 depends on NETFILTER_ADVANCED
216 select NF_CT_PROTO_GRE
218 This module adds support for PPTP (Point to Point Tunnelling
219 Protocol, RFC2637) connection tracking and NAT.
221 If you are running PPTP sessions over a stateful firewall or NAT
222 box, you may want to enable this feature.
224 Please note that not all PPTP modes of operation are supported yet.
225 Specifically these limitations exist:
226 - Blindly assumes that control connections are always established
227 in PNS->PAC direction. This is a violation of RFC2637.
228 - Only supports a single call within each session
230 To compile it as a module, choose M here. If unsure, say N.
232 config NF_CONNTRACK_SANE
233 tristate "SANE protocol support (EXPERIMENTAL)"
234 depends on EXPERIMENTAL && NF_CONNTRACK
235 depends on NETFILTER_ADVANCED
237 SANE is a protocol for remote access to scanners as implemented
238 by the 'saned' daemon. Like FTP, it uses separate control and
241 With this module you can support SANE on a connection tracking
244 To compile it as a module, choose M here. If unsure, say N.
246 config NF_CONNTRACK_SIP
247 tristate "SIP protocol support"
248 depends on NF_CONNTRACK
249 default m if NETFILTER_ADVANCED=n
251 SIP is an application-layer control protocol that can establish,
252 modify, and terminate multimedia sessions (conferences) such as
253 Internet telephony calls. With the ip_conntrack_sip and
254 the nf_nat_sip modules you can support the protocol on a connection
255 tracking/NATing firewall.
257 To compile it as a module, choose M here. If unsure, say N.
259 config NF_CONNTRACK_TFTP
260 tristate "TFTP protocol support"
261 depends on NF_CONNTRACK
262 depends on NETFILTER_ADVANCED
264 TFTP connection tracking helper, this is required depending
265 on how restrictive your ruleset is.
266 If you are using a tftp client behind -j SNAT or -j MASQUERADING
269 To compile it as a module, choose M here. If unsure, say N.
272 tristate 'Connection tracking netlink interface'
273 depends on NF_CONNTRACK
274 select NETFILTER_NETLINK
275 depends on NF_NAT=n || NF_NAT
276 default m if NETFILTER_ADVANCED=n
278 This option enables support for a netlink-based userspace interface
280 config NETFILTER_XTABLES
281 tristate "Netfilter Xtables support (required for ip_tables)"
282 default m if NETFILTER_ADVANCED=n
284 This is required if you intend to use any of ip_tables,
285 ip6_tables or arp_tables.
287 # alphabetically ordered list of targets
289 config NETFILTER_XT_TARGET_CLASSIFY
290 tristate '"CLASSIFY" target support'
291 depends on NETFILTER_XTABLES
292 depends on NETFILTER_ADVANCED
294 This option adds a `CLASSIFY' target, which enables the user to set
295 the priority of a packet. Some qdiscs can use this value for
296 classification, among these are:
298 atm, cbq, dsmark, pfifo_fast, htb, prio
300 To compile it as a module, choose M here. If unsure, say N.
302 config NETFILTER_XT_TARGET_CONNMARK
303 tristate '"CONNMARK" target support'
304 depends on NETFILTER_XTABLES
305 depends on IP_NF_MANGLE || IP6_NF_MANGLE
306 depends on NF_CONNTRACK
307 depends on NETFILTER_ADVANCED
308 select NF_CONNTRACK_MARK
310 This option adds a `CONNMARK' target, which allows one to manipulate
311 the connection mark value. Similar to the MARK target, but
312 affects the connection mark value rather than the packet mark value.
314 If you want to compile it as a module, say M here and read
315 <file:Documentation/kbuild/modules.txt>. The module will be called
316 ipt_CONNMARK.ko. If unsure, say `N'.
318 config NETFILTER_XT_TARGET_DSCP
319 tristate '"DSCP" and "TOS" target support'
320 depends on NETFILTER_XTABLES
321 depends on IP_NF_MANGLE || IP6_NF_MANGLE
322 depends on NETFILTER_ADVANCED
324 This option adds a `DSCP' target, which allows you to manipulate
325 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
327 The DSCP field can have any value between 0x0 and 0x3f inclusive.
329 It also adds the "TOS" target, which allows you to create rules in
330 the "mangle" table which alter the Type Of Service field of an IPv4
331 or the Priority field of an IPv6 packet, prior to routing.
333 To compile it as a module, choose M here. If unsure, say N.
335 config NETFILTER_XT_TARGET_MARK
336 tristate '"MARK" target support'
337 depends on NETFILTER_XTABLES
338 default m if NETFILTER_ADVANCED=n
340 This option adds a `MARK' target, which allows you to create rules
341 in the `mangle' table which alter the netfilter mark (nfmark) field
342 associated with the packet prior to routing. This can change
343 the routing method (see `Use netfilter MARK value as routing
344 key') and can also be used by other subsystems to change their
347 To compile it as a module, choose M here. If unsure, say N.
349 config NETFILTER_XT_TARGET_NFQUEUE
350 tristate '"NFQUEUE" target Support'
351 depends on NETFILTER_XTABLES
352 depends on NETFILTER_ADVANCED
354 This target replaced the old obsolete QUEUE target.
356 As opposed to QUEUE, it supports 65535 different queues,
359 To compile it as a module, choose M here. If unsure, say N.
361 config NETFILTER_XT_TARGET_NFLOG
362 tristate '"NFLOG" target support'
363 depends on NETFILTER_XTABLES
364 default m if NETFILTER_ADVANCED=n
366 This option enables the NFLOG target, which allows to LOG
367 messages through the netfilter logging API, which can use
368 either the old LOG target, the old ULOG target or nfnetlink_log
371 To compile it as a module, choose M here. If unsure, say N.
373 config NETFILTER_XT_TARGET_NOTRACK
374 tristate '"NOTRACK" target support'
375 depends on NETFILTER_XTABLES
376 depends on IP_NF_RAW || IP6_NF_RAW
377 depends on NF_CONNTRACK
378 depends on NETFILTER_ADVANCED
380 The NOTRACK target allows a select rule to specify
381 which packets *not* to enter the conntrack/NAT
382 subsystem with all the consequences (no ICMP error tracking,
383 no protocol helpers for the selected packets).
385 If you want to compile it as a module, say M here and read
386 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
388 config NETFILTER_XT_TARGET_RATEEST
389 tristate '"RATEEST" target support'
390 depends on NETFILTER_XTABLES
391 depends on NETFILTER_ADVANCED
393 This option adds a `RATEEST' target, which allows to measure
394 rates similar to TC estimators. The `rateest' match can be
395 used to match on the measured rates.
397 To compile it as a module, choose M here. If unsure, say N.
399 config NETFILTER_XT_TARGET_TRACE
400 tristate '"TRACE" target support'
401 depends on NETFILTER_XTABLES
402 depends on IP_NF_RAW || IP6_NF_RAW
403 depends on NETFILTER_ADVANCED
405 The TRACE target allows you to mark packets so that the kernel
406 will log every rule which match the packets as those traverse
407 the tables, chains, rules.
409 If you want to compile it as a module, say M here and read
410 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
412 config NETFILTER_XT_TARGET_SECMARK
413 tristate '"SECMARK" target support'
414 depends on NETFILTER_XTABLES && NETWORK_SECMARK
415 default m if NETFILTER_ADVANCED=n
417 The SECMARK target allows security marking of network
418 packets, for use with security subsystems.
420 To compile it as a module, choose M here. If unsure, say N.
422 config NETFILTER_XT_TARGET_CONNSECMARK
423 tristate '"CONNSECMARK" target support'
424 depends on NETFILTER_XTABLES && NF_CONNTRACK && NF_CONNTRACK_SECMARK
425 default m if NETFILTER_ADVANCED=n
427 The CONNSECMARK target copies security markings from packets
428 to connections, and restores security markings from connections
429 to packets (if the packets are not already marked). This would
430 normally be used in conjunction with the SECMARK target.
432 To compile it as a module, choose M here. If unsure, say N.
434 config NETFILTER_XT_TARGET_TCPMSS
435 tristate '"TCPMSS" target support'
436 depends on NETFILTER_XTABLES && (IPV6 || IPV6=n)
437 default m if NETFILTER_ADVANCED=n
439 This option adds a `TCPMSS' target, which allows you to alter the
440 MSS value of TCP SYN packets, to control the maximum size for that
441 connection (usually limiting it to your outgoing interface's MTU
444 This is used to overcome criminally braindead ISPs or servers which
445 block ICMP Fragmentation Needed packets. The symptoms of this
446 problem are that everything works fine from your Linux
447 firewall/router, but machines behind it can never exchange large
449 1) Web browsers connect, then hang with no data received.
450 2) Small mail works fine, but large emails hang.
451 3) ssh works fine, but scp hangs after initial handshaking.
453 Workaround: activate this option and add a rule to your firewall
456 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
457 -j TCPMSS --clamp-mss-to-pmtu
459 To compile it as a module, choose M here. If unsure, say N.
461 config NETFILTER_XT_TARGET_TCPOPTSTRIP
462 tristate '"TCPOPTSTRIP" target support (EXPERIMENTAL)'
463 depends on EXPERIMENTAL && NETFILTER_XTABLES
464 depends on IP_NF_MANGLE || IP6_NF_MANGLE
465 depends on NETFILTER_ADVANCED
467 This option adds a "TCPOPTSTRIP" target, which allows you to strip
468 TCP options from TCP packets.
470 config NETFILTER_XT_MATCH_COMMENT
471 tristate '"comment" match support'
472 depends on NETFILTER_XTABLES
473 depends on NETFILTER_ADVANCED
475 This option adds a `comment' dummy-match, which allows you to put
476 comments in your iptables ruleset.
478 If you want to compile it as a module, say M here and read
479 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
481 config NETFILTER_XT_MATCH_CONNBYTES
482 tristate '"connbytes" per-connection counter match support'
483 depends on NETFILTER_XTABLES
484 depends on NF_CONNTRACK
485 depends on NETFILTER_ADVANCED
488 This option adds a `connbytes' match, which allows you to match the
489 number of bytes and/or packets for each direction within a connection.
491 If you want to compile it as a module, say M here and read
492 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
494 config NETFILTER_XT_MATCH_CONNLIMIT
495 tristate '"connlimit" match support"'
496 depends on NETFILTER_XTABLES
497 depends on NF_CONNTRACK
498 depends on NETFILTER_ADVANCED
500 This match allows you to match against the number of parallel
501 connections to a server per client IP address (or address block).
503 config NETFILTER_XT_MATCH_CONNMARK
504 tristate '"connmark" connection mark match support'
505 depends on NETFILTER_XTABLES
506 depends on NF_CONNTRACK
507 depends on NETFILTER_ADVANCED
508 select NF_CONNTRACK_MARK
510 This option adds a `connmark' match, which allows you to match the
511 connection mark value previously set for the session by `CONNMARK'.
513 If you want to compile it as a module, say M here and read
514 <file:Documentation/kbuild/modules.txt>. The module will be called
515 ipt_connmark.ko. If unsure, say `N'.
517 config NETFILTER_XT_MATCH_CONNTRACK
518 tristate '"conntrack" connection tracking match support'
519 depends on NETFILTER_XTABLES
520 depends on NF_CONNTRACK
521 default m if NETFILTER_ADVANCED=n
523 This is a general conntrack match module, a superset of the state match.
525 It allows matching on additional conntrack information, which is
526 useful in complex configurations, such as NAT gateways with multiple
527 internet links or tunnels.
529 To compile it as a module, choose M here. If unsure, say N.
531 config NETFILTER_XT_MATCH_DCCP
532 tristate '"dccp" protocol match support'
533 depends on NETFILTER_XTABLES
534 depends on NETFILTER_ADVANCED
536 With this option enabled, you will be able to use the iptables
537 `dccp' match in order to match on DCCP source/destination ports
540 If you want to compile it as a module, say M here and read
541 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
543 config NETFILTER_XT_MATCH_DSCP
544 tristate '"dscp" and "tos" match support'
545 depends on NETFILTER_XTABLES
546 depends on NETFILTER_ADVANCED
548 This option adds a `DSCP' match, which allows you to match against
549 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
551 The DSCP field can have any value between 0x0 and 0x3f inclusive.
553 It will also add a "tos" match, which allows you to match packets
554 based on the Type Of Service fields of the IPv4 packet (which share
555 the same bits as DSCP).
557 To compile it as a module, choose M here. If unsure, say N.
559 config NETFILTER_XT_MATCH_ESP
560 tristate '"esp" match support'
561 depends on NETFILTER_XTABLES
562 depends on NETFILTER_ADVANCED
564 This match extension allows you to match a range of SPIs
565 inside ESP header of IPSec packets.
567 To compile it as a module, choose M here. If unsure, say N.
569 config NETFILTER_XT_MATCH_HELPER
570 tristate '"helper" match support'
571 depends on NETFILTER_XTABLES
572 depends on NF_CONNTRACK
573 depends on NETFILTER_ADVANCED
575 Helper matching allows you to match packets in dynamic connections
576 tracked by a conntrack-helper, ie. ip_conntrack_ftp
578 To compile it as a module, choose M here. If unsure, say Y.
580 config NETFILTER_XT_MATCH_IPRANGE
581 tristate '"iprange" address range match support'
582 depends on NETFILTER_XTABLES
583 depends on NETFILTER_ADVANCED
585 This option adds a "iprange" match, which allows you to match based on
586 an IP address range. (Normal iptables only matches on single addresses
587 with an optional mask.)
591 config NETFILTER_XT_MATCH_LENGTH
592 tristate '"length" match support'
593 depends on NETFILTER_XTABLES
594 depends on NETFILTER_ADVANCED
596 This option allows you to match the length of a packet against a
597 specific value or range of values.
599 To compile it as a module, choose M here. If unsure, say N.
601 config NETFILTER_XT_MATCH_LIMIT
602 tristate '"limit" match support'
603 depends on NETFILTER_XTABLES
604 depends on NETFILTER_ADVANCED
606 limit matching allows you to control the rate at which a rule can be
607 matched: mainly useful in combination with the LOG target ("LOG
608 target support", below) and to avoid some Denial of Service attacks.
610 To compile it as a module, choose M here. If unsure, say N.
612 config NETFILTER_XT_MATCH_MAC
613 tristate '"mac" address match support'
614 depends on NETFILTER_XTABLES
615 depends on NETFILTER_ADVANCED
617 MAC matching allows you to match packets based on the source
618 Ethernet address of the packet.
620 To compile it as a module, choose M here. If unsure, say N.
622 config NETFILTER_XT_MATCH_MARK
623 tristate '"mark" match support'
624 depends on NETFILTER_XTABLES
625 default m if NETFILTER_ADVANCED=n
627 Netfilter mark matching allows you to match packets based on the
628 `nfmark' value in the packet. This can be set by the MARK target
631 To compile it as a module, choose M here. If unsure, say N.
633 config NETFILTER_XT_MATCH_OWNER
634 tristate '"owner" match support'
635 depends on NETFILTER_XTABLES
636 depends on NETFILTER_ADVANCED
638 Socket owner matching allows you to match locally-generated packets
639 based on who created the socket: the user or group. It is also
640 possible to check whether a socket actually exists.
642 config NETFILTER_XT_MATCH_POLICY
643 tristate 'IPsec "policy" match support'
644 depends on NETFILTER_XTABLES && XFRM
645 default m if NETFILTER_ADVANCED=n
647 Policy matching allows you to match packets based on the
648 IPsec policy that was used during decapsulation/will
649 be used during encapsulation.
651 To compile it as a module, choose M here. If unsure, say N.
653 config NETFILTER_XT_MATCH_MULTIPORT
654 tristate '"multiport" Multiple port match support'
655 depends on NETFILTER_XTABLES
656 depends on NETFILTER_ADVANCED
658 Multiport matching allows you to match TCP or UDP packets based on
659 a series of source or destination ports: normally a rule can only
660 match a single range of ports.
662 To compile it as a module, choose M here. If unsure, say N.
664 config NETFILTER_XT_MATCH_PHYSDEV
665 tristate '"physdev" match support'
666 depends on NETFILTER_XTABLES && BRIDGE && BRIDGE_NETFILTER
667 depends on NETFILTER_ADVANCED
669 Physdev packet matching matches against the physical bridge ports
670 the IP packet arrived on or will leave by.
672 To compile it as a module, choose M here. If unsure, say N.
674 config NETFILTER_XT_MATCH_PKTTYPE
675 tristate '"pkttype" packet type match support'
676 depends on NETFILTER_XTABLES
677 depends on NETFILTER_ADVANCED
679 Packet type matching allows you to match a packet by
680 its "class", eg. BROADCAST, MULTICAST, ...
683 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
685 To compile it as a module, choose M here. If unsure, say N.
687 config NETFILTER_XT_MATCH_QUOTA
688 tristate '"quota" match support'
689 depends on NETFILTER_XTABLES
690 depends on NETFILTER_ADVANCED
692 This option adds a `quota' match, which allows to match on a
695 If you want to compile it as a module, say M here and read
696 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
698 config NETFILTER_XT_MATCH_RATEEST
699 tristate '"rateest" match support'
700 depends on NETFILTER_XTABLES
701 depends on NETFILTER_ADVANCED
702 select NETFILTER_XT_TARGET_RATEEST
704 This option adds a `rateest' match, which allows to match on the
705 rate estimated by the RATEEST target.
707 To compile it as a module, choose M here. If unsure, say N.
709 config NETFILTER_XT_MATCH_REALM
710 tristate '"realm" match support'
711 depends on NETFILTER_XTABLES
712 depends on NETFILTER_ADVANCED
715 This option adds a `realm' match, which allows you to use the realm
716 key from the routing subsystem inside iptables.
718 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
721 If you want to compile it as a module, say M here and read
722 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
724 config NETFILTER_XT_MATCH_SCTP
725 tristate '"sctp" protocol match support (EXPERIMENTAL)'
726 depends on NETFILTER_XTABLES && EXPERIMENTAL
727 depends on NETFILTER_ADVANCED
729 With this option enabled, you will be able to use the
730 `sctp' match in order to match on SCTP source/destination ports
731 and SCTP chunk types.
733 If you want to compile it as a module, say M here and read
734 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
736 config NETFILTER_XT_MATCH_STATE
737 tristate '"state" match support'
738 depends on NETFILTER_XTABLES
739 depends on NF_CONNTRACK
740 default m if NETFILTER_ADVANCED=n
742 Connection state matching allows you to match packets based on their
743 relationship to a tracked connection (ie. previous packets). This
744 is a powerful tool for packet classification.
746 To compile it as a module, choose M here. If unsure, say N.
748 config NETFILTER_XT_MATCH_STATISTIC
749 tristate '"statistic" match support'
750 depends on NETFILTER_XTABLES
751 depends on NETFILTER_ADVANCED
753 This option adds a `statistic' match, which allows you to match
754 on packets periodically or randomly with a given percentage.
756 To compile it as a module, choose M here. If unsure, say N.
758 config NETFILTER_XT_MATCH_STRING
759 tristate '"string" match support'
760 depends on NETFILTER_XTABLES
761 depends on NETFILTER_ADVANCED
763 select TEXTSEARCH_KMP
765 select TEXTSEARCH_FSM
767 This option adds a `string' match, which allows you to look for
768 pattern matchings in packets.
770 To compile it as a module, choose M here. If unsure, say N.
772 config NETFILTER_XT_MATCH_TCPMSS
773 tristate '"tcpmss" match support'
774 depends on NETFILTER_XTABLES
775 depends on NETFILTER_ADVANCED
777 This option adds a `tcpmss' match, which allows you to examine the
778 MSS value of TCP SYN packets, which control the maximum packet size
781 To compile it as a module, choose M here. If unsure, say N.
783 config NETFILTER_XT_MATCH_TIME
784 tristate '"time" match support'
785 depends on NETFILTER_XTABLES
786 depends on NETFILTER_ADVANCED
788 This option adds a "time" match, which allows you to match based on
789 the packet arrival time (at the machine which netfilter is running)
790 on) or departure time/date (for locally generated packets).
792 If you say Y here, try `iptables -m time --help` for
795 If you want to compile it as a module, say M here.
798 config NETFILTER_XT_MATCH_U32
799 tristate '"u32" match support'
800 depends on NETFILTER_XTABLES
801 depends on NETFILTER_ADVANCED
803 u32 allows you to extract quantities of up to 4 bytes from a packet,
804 AND them with specified masks, shift them by specified amounts and
805 test whether the results are in any of a set of specified ranges.
806 The specification of what to extract is general enough to skip over
807 headers with lengths stored in the packet, as in IP or TCP header
810 Details and examples are in the kernel module source.
812 config NETFILTER_XT_MATCH_HASHLIMIT
813 tristate '"hashlimit" match support'
814 depends on NETFILTER_XTABLES && (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
815 depends on NETFILTER_ADVANCED
817 This option adds a `hashlimit' match.
819 As opposed to `limit', this match dynamically creates a hash table
820 of limit buckets, based on your selection of source/destination
821 addresses and/or ports.
823 It enables you to express policies like `10kpps for any given
824 destination address' or `500pps from any given source address'