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 paramater 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_EVENTS
87 bool "Connection tracking events"
88 depends on NETFILTER_ADVANCED
90 If this option is enabled, the connection tracking code will
91 provide a notifier chain that can be used by other kernel code
92 to get notified about changes in the connection tracking state.
96 config NF_CT_PROTO_DCCP
97 tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)'
98 depends on EXPERIMENTAL
99 depends on NETFILTER_ADVANCED
102 With this option enabled, the layer 3 independent connection
103 tracking code will be able to do state tracking on DCCP connections.
107 config NF_CT_PROTO_GRE
110 config NF_CT_PROTO_SCTP
111 tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
112 depends on EXPERIMENTAL
113 depends on NETFILTER_ADVANCED
116 With this option enabled, the layer 3 independent connection
117 tracking code will be able to do state tracking on SCTP connections.
119 If you want to compile it as a module, say M here and read
120 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
122 config NF_CT_PROTO_UDPLITE
123 tristate 'UDP-Lite protocol connection tracking support'
124 depends on NETFILTER_ADVANCED
126 With this option enabled, the layer 3 independent connection
127 tracking code will be able to do state tracking on UDP-Lite
130 To compile it as a module, choose M here. If unsure, say N.
132 config NF_CONNTRACK_AMANDA
133 tristate "Amanda backup protocol support"
134 depends on NETFILTER_ADVANCED
136 select TEXTSEARCH_KMP
138 If you are running the Amanda backup package <http://www.amanda.org/>
139 on this machine or machines that will be MASQUERADED through this
140 machine, then you may want to enable this feature. This allows the
141 connection tracking and natting code to allow the sub-channels that
142 Amanda requires for communication of the backup data, messages and
145 To compile it as a module, choose M here. If unsure, say N.
147 config NF_CONNTRACK_FTP
148 tristate "FTP protocol support"
149 default m if NETFILTER_ADVANCED=n
151 Tracking FTP connections is problematic: special helpers are
152 required for tracking them, and doing masquerading and other forms
153 of Network Address Translation on them.
155 This is FTP support on Layer 3 independent connection tracking.
156 Layer 3 independent connection tracking is experimental scheme
157 which generalize ip_conntrack to support other layer 3 protocols.
159 To compile it as a module, choose M here. If unsure, say N.
161 config NF_CONNTRACK_H323
162 tristate "H.323 protocol support"
163 depends on (IPV6 || IPV6=n)
164 depends on NETFILTER_ADVANCED
166 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
167 important VoIP protocols, it is widely used by voice hardware and
168 software including voice gateways, IP phones, Netmeeting, OpenPhone,
171 With this module you can support H.323 on a connection tracking/NAT
174 This module supports RAS, Fast Start, H.245 Tunnelling, Call
175 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
176 whiteboard, file transfer, etc. For more information, please
177 visit http://nath323.sourceforge.net/.
179 To compile it as a module, choose M here. If unsure, say N.
181 config NF_CONNTRACK_IRC
182 tristate "IRC protocol support"
183 default m if NETFILTER_ADVANCED=n
185 There is a commonly-used extension to IRC called
186 Direct Client-to-Client Protocol (DCC). This enables users to send
187 files to each other, and also chat to each other without the need
188 of a server. DCC Sending is used anywhere you send files over IRC,
189 and DCC Chat is most commonly used by Eggdrop bots. If you are
190 using NAT, this extension will enable you to send files and initiate
191 chats. Note that you do NOT need this extension to get files or
192 have others initiate chats, or everything else in IRC.
194 To compile it as a module, choose M here. If unsure, say N.
196 config NF_CONNTRACK_NETBIOS_NS
197 tristate "NetBIOS name service protocol support"
198 depends on NETFILTER_ADVANCED
200 NetBIOS name service requests are sent as broadcast messages from an
201 unprivileged port and responded to with unicast messages to the
202 same port. This make them hard to firewall properly because connection
203 tracking doesn't deal with broadcasts. This helper tracks locally
204 originating NetBIOS name service requests and the corresponding
205 responses. It relies on correct IP address configuration, specifically
206 netmask and broadcast address. When properly configured, the output
207 of "ip address show" should look similar to this:
209 $ ip -4 address show eth0
210 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
211 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
213 To compile it as a module, choose M here. If unsure, say N.
215 config NF_CONNTRACK_PPTP
216 tristate "PPtP protocol support"
217 depends on NETFILTER_ADVANCED
218 select NF_CT_PROTO_GRE
220 This module adds support for PPTP (Point to Point Tunnelling
221 Protocol, RFC2637) connection tracking and NAT.
223 If you are running PPTP sessions over a stateful firewall or NAT
224 box, you may want to enable this feature.
226 Please note that not all PPTP modes of operation are supported yet.
227 Specifically these limitations exist:
228 - Blindly assumes that control connections are always established
229 in PNS->PAC direction. This is a violation of RFC2637.
230 - Only supports a single call within each session
232 To compile it as a module, choose M here. If unsure, say N.
234 config NF_CONNTRACK_SANE
235 tristate "SANE protocol support (EXPERIMENTAL)"
236 depends on EXPERIMENTAL
237 depends on NETFILTER_ADVANCED
239 SANE is a protocol for remote access to scanners as implemented
240 by the 'saned' daemon. Like FTP, it uses separate control and
243 With this module you can support SANE on a connection tracking
246 To compile it as a module, choose M here. If unsure, say N.
248 config NF_CONNTRACK_SIP
249 tristate "SIP protocol support"
250 default m if NETFILTER_ADVANCED=n
252 SIP is an application-layer control protocol that can establish,
253 modify, and terminate multimedia sessions (conferences) such as
254 Internet telephony calls. With the ip_conntrack_sip and
255 the nf_nat_sip modules you can support the protocol on a connection
256 tracking/NATing firewall.
258 To compile it as a module, choose M here. If unsure, say N.
260 config NF_CONNTRACK_TFTP
261 tristate "TFTP protocol support"
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 select NETFILTER_NETLINK
274 default m if NETFILTER_ADVANCED=n
276 This option enables support for a netlink-based userspace interface
278 # transparent proxy support
279 config NETFILTER_TPROXY
280 tristate "Transparent proxying support (EXPERIMENTAL)"
281 depends on EXPERIMENTAL
282 depends on IP_NF_MANGLE
283 depends on NETFILTER_ADVANCED
285 This option enables transparent proxying support, that is,
286 support for handling non-locally bound IPv4 TCP and UDP sockets.
287 For it to work you will have to configure certain iptables rules
288 and use policy routing. For more information on how to set it up
289 see Documentation/networking/tproxy.txt.
291 To compile it as a module, choose M here. If unsure, say N.
295 config NETFILTER_XTABLES
296 tristate "Netfilter Xtables support (required for ip_tables)"
297 default m if NETFILTER_ADVANCED=n
299 This is required if you intend to use any of ip_tables,
300 ip6_tables or arp_tables.
304 # alphabetically ordered list of targets
306 config NETFILTER_XT_TARGET_CLASSIFY
307 tristate '"CLASSIFY" target support'
308 depends on NETFILTER_ADVANCED
310 This option adds a `CLASSIFY' target, which enables the user to set
311 the priority of a packet. Some qdiscs can use this value for
312 classification, among these are:
314 atm, cbq, dsmark, pfifo_fast, htb, prio
316 To compile it as a module, choose M here. If unsure, say N.
318 config NETFILTER_XT_TARGET_CONNMARK
319 tristate '"CONNMARK" target support'
320 depends on NF_CONNTRACK
321 depends on NETFILTER_ADVANCED
322 select NF_CONNTRACK_MARK
324 This option adds a `CONNMARK' target, which allows one to manipulate
325 the connection mark value. Similar to the MARK target, but
326 affects the connection mark value rather than the packet mark value.
328 If you want to compile it as a module, say M here and read
329 <file:Documentation/kbuild/modules.txt>. The module will be called
330 ipt_CONNMARK.ko. If unsure, say `N'.
332 config NETFILTER_XT_TARGET_CONNSECMARK
333 tristate '"CONNSECMARK" target support'
334 depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
335 default m if NETFILTER_ADVANCED=n
337 The CONNSECMARK target copies security markings from packets
338 to connections, and restores security markings from connections
339 to packets (if the packets are not already marked). This would
340 normally be used in conjunction with the SECMARK target.
342 To compile it as a module, choose M here. If unsure, say N.
344 config NETFILTER_XT_TARGET_DSCP
345 tristate '"DSCP" and "TOS" target support'
346 depends on IP_NF_MANGLE || IP6_NF_MANGLE
347 depends on NETFILTER_ADVANCED
349 This option adds a `DSCP' target, which allows you to manipulate
350 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
352 The DSCP field can have any value between 0x0 and 0x3f inclusive.
354 It also adds the "TOS" target, which allows you to create rules in
355 the "mangle" table which alter the Type Of Service field of an IPv4
356 or the Priority field of an IPv6 packet, prior to routing.
358 To compile it as a module, choose M here. If unsure, say N.
360 config NETFILTER_XT_TARGET_MARK
361 tristate '"MARK" target support'
362 default m if NETFILTER_ADVANCED=n
364 This option adds a `MARK' target, which allows you to create rules
365 in the `mangle' table which alter the netfilter mark (nfmark) field
366 associated with the packet prior to routing. This can change
367 the routing method (see `Use netfilter MARK value as routing
368 key') and can also be used by other subsystems to change their
371 To compile it as a module, choose M here. If unsure, say N.
373 config NETFILTER_XT_TARGET_NFLOG
374 tristate '"NFLOG" target support'
375 default m if NETFILTER_ADVANCED=n
376 select NETFILTER_NETLINK_LOG
378 This option enables the NFLOG target, which allows to LOG
379 messages through nfnetlink_log.
381 To compile it as a module, choose M here. If unsure, say N.
383 config NETFILTER_XT_TARGET_NFQUEUE
384 tristate '"NFQUEUE" target Support'
385 depends on NETFILTER_ADVANCED
387 This target replaced the old obsolete QUEUE target.
389 As opposed to QUEUE, it supports 65535 different queues,
392 To compile it as a module, choose M here. If unsure, say N.
394 config NETFILTER_XT_TARGET_NOTRACK
395 tristate '"NOTRACK" target support'
396 depends on IP_NF_RAW || IP6_NF_RAW
397 depends on NF_CONNTRACK
398 depends on NETFILTER_ADVANCED
400 The NOTRACK target allows a select rule to specify
401 which packets *not* to enter the conntrack/NAT
402 subsystem with all the consequences (no ICMP error tracking,
403 no protocol helpers for the selected packets).
405 If you want to compile it as a module, say M here and read
406 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
408 config NETFILTER_XT_TARGET_RATEEST
409 tristate '"RATEEST" target support'
410 depends on NETFILTER_ADVANCED
412 This option adds a `RATEEST' target, which allows to measure
413 rates similar to TC estimators. The `rateest' match can be
414 used to match on the measured rates.
416 To compile it as a module, choose M here. If unsure, say N.
418 config NETFILTER_XT_TARGET_TPROXY
419 tristate '"TPROXY" target support (EXPERIMENTAL)'
420 depends on EXPERIMENTAL
421 depends on NETFILTER_TPROXY
422 depends on NETFILTER_XTABLES
423 depends on NETFILTER_ADVANCED
424 select NF_DEFRAG_IPV4
426 This option adds a `TPROXY' target, which is somewhat similar to
427 REDIRECT. It can only be used in the mangle table and is useful
428 to redirect traffic to a transparent proxy. It does _not_ depend
429 on Netfilter connection tracking and NAT, unlike REDIRECT.
431 To compile it as a module, choose M here. If unsure, say N.
433 config NETFILTER_XT_TARGET_TRACE
434 tristate '"TRACE" target support'
435 depends on IP_NF_RAW || IP6_NF_RAW
436 depends on NETFILTER_ADVANCED
438 The TRACE target allows you to mark packets so that the kernel
439 will log every rule which match the packets as those traverse
440 the tables, chains, rules.
442 If you want to compile it as a module, say M here and read
443 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
445 config NETFILTER_XT_TARGET_SECMARK
446 tristate '"SECMARK" target support'
447 depends on NETWORK_SECMARK
448 default m if NETFILTER_ADVANCED=n
450 The SECMARK target allows security marking of network
451 packets, for use with security subsystems.
453 To compile it as a module, choose M here. If unsure, say N.
455 config NETFILTER_XT_TARGET_TCPMSS
456 tristate '"TCPMSS" target support'
457 depends on (IPV6 || IPV6=n)
458 default m if NETFILTER_ADVANCED=n
460 This option adds a `TCPMSS' target, which allows you to alter the
461 MSS value of TCP SYN packets, to control the maximum size for that
462 connection (usually limiting it to your outgoing interface's MTU
465 This is used to overcome criminally braindead ISPs or servers which
466 block ICMP Fragmentation Needed packets. The symptoms of this
467 problem are that everything works fine from your Linux
468 firewall/router, but machines behind it can never exchange large
470 1) Web browsers connect, then hang with no data received.
471 2) Small mail works fine, but large emails hang.
472 3) ssh works fine, but scp hangs after initial handshaking.
474 Workaround: activate this option and add a rule to your firewall
477 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
478 -j TCPMSS --clamp-mss-to-pmtu
480 To compile it as a module, choose M here. If unsure, say N.
482 config NETFILTER_XT_TARGET_TCPOPTSTRIP
483 tristate '"TCPOPTSTRIP" target support (EXPERIMENTAL)'
484 depends on EXPERIMENTAL
485 depends on IP_NF_MANGLE || IP6_NF_MANGLE
486 depends on NETFILTER_ADVANCED
488 This option adds a "TCPOPTSTRIP" target, which allows you to strip
489 TCP options from TCP packets.
491 config NETFILTER_XT_MATCH_COMMENT
492 tristate '"comment" match support'
493 depends on NETFILTER_ADVANCED
495 This option adds a `comment' dummy-match, which allows you to put
496 comments in your iptables ruleset.
498 If you want to compile it as a module, say M here and read
499 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
501 config NETFILTER_XT_MATCH_CONNBYTES
502 tristate '"connbytes" per-connection counter match support'
503 depends on NF_CONNTRACK
504 depends on NETFILTER_ADVANCED
507 This option adds a `connbytes' match, which allows you to match the
508 number of bytes and/or packets for each direction within a connection.
510 If you want to compile it as a module, say M here and read
511 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
513 config NETFILTER_XT_MATCH_CONNLIMIT
514 tristate '"connlimit" match support"'
515 depends on NF_CONNTRACK
516 depends on NETFILTER_ADVANCED
518 This match allows you to match against the number of parallel
519 connections to a server per client IP address (or address block).
521 config NETFILTER_XT_MATCH_CONNMARK
522 tristate '"connmark" connection mark match support'
523 depends on NF_CONNTRACK
524 depends on NETFILTER_ADVANCED
525 select NF_CONNTRACK_MARK
527 This option adds a `connmark' match, which allows you to match the
528 connection mark value previously set for the session by `CONNMARK'.
530 If you want to compile it as a module, say M here and read
531 <file:Documentation/kbuild/modules.txt>. The module will be called
532 ipt_connmark.ko. If unsure, say `N'.
534 config NETFILTER_XT_MATCH_CONNTRACK
535 tristate '"conntrack" connection tracking match support'
536 depends on NF_CONNTRACK
537 default m if NETFILTER_ADVANCED=n
539 This is a general conntrack match module, a superset of the state match.
541 It allows matching on additional conntrack information, which is
542 useful in complex configurations, such as NAT gateways with multiple
543 internet links or tunnels.
545 To compile it as a module, choose M here. If unsure, say N.
547 config NETFILTER_XT_MATCH_DCCP
548 tristate '"dccp" protocol match support'
549 depends on NETFILTER_ADVANCED
552 With this option enabled, you will be able to use the iptables
553 `dccp' match in order to match on DCCP source/destination ports
556 If you want to compile it as a module, say M here and read
557 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
559 config NETFILTER_XT_MATCH_DSCP
560 tristate '"dscp" and "tos" match support'
561 depends on NETFILTER_ADVANCED
563 This option adds a `DSCP' match, which allows you to match against
564 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
566 The DSCP field can have any value between 0x0 and 0x3f inclusive.
568 It will also add a "tos" match, which allows you to match packets
569 based on the Type Of Service fields of the IPv4 packet (which share
570 the same bits as DSCP).
572 To compile it as a module, choose M here. If unsure, say N.
574 config NETFILTER_XT_MATCH_ESP
575 tristate '"esp" match support'
576 depends on NETFILTER_ADVANCED
578 This match extension allows you to match a range of SPIs
579 inside ESP header of IPSec packets.
581 To compile it as a module, choose M here. If unsure, say N.
583 config NETFILTER_XT_MATCH_HASHLIMIT
584 tristate '"hashlimit" match support'
585 depends on (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
586 depends on NETFILTER_ADVANCED
588 This option adds a `hashlimit' match.
590 As opposed to `limit', this match dynamically creates a hash table
591 of limit buckets, based on your selection of source/destination
592 addresses and/or ports.
594 It enables you to express policies like `10kpps for any given
595 destination address' or `500pps from any given source address'
598 config NETFILTER_XT_MATCH_HELPER
599 tristate '"helper" match support'
600 depends on NF_CONNTRACK
601 depends on NETFILTER_ADVANCED
603 Helper matching allows you to match packets in dynamic connections
604 tracked by a conntrack-helper, ie. ip_conntrack_ftp
606 To compile it as a module, choose M here. If unsure, say Y.
608 config NETFILTER_XT_MATCH_IPRANGE
609 tristate '"iprange" address range match support'
610 depends on NETFILTER_ADVANCED
612 This option adds a "iprange" match, which allows you to match based on
613 an IP address range. (Normal iptables only matches on single addresses
614 with an optional mask.)
618 config NETFILTER_XT_MATCH_LENGTH
619 tristate '"length" match support'
620 depends on NETFILTER_ADVANCED
622 This option allows you to match the length of a packet against a
623 specific value or range of values.
625 To compile it as a module, choose M here. If unsure, say N.
627 config NETFILTER_XT_MATCH_LIMIT
628 tristate '"limit" match support'
629 depends on NETFILTER_ADVANCED
631 limit matching allows you to control the rate at which a rule can be
632 matched: mainly useful in combination with the LOG target ("LOG
633 target support", below) and to avoid some Denial of Service attacks.
635 To compile it as a module, choose M here. If unsure, say N.
637 config NETFILTER_XT_MATCH_MAC
638 tristate '"mac" address match support'
639 depends on NETFILTER_ADVANCED
641 MAC matching allows you to match packets based on the source
642 Ethernet address of the packet.
644 To compile it as a module, choose M here. If unsure, say N.
646 config NETFILTER_XT_MATCH_MARK
647 tristate '"mark" match support'
648 default m if NETFILTER_ADVANCED=n
650 Netfilter mark matching allows you to match packets based on the
651 `nfmark' value in the packet. This can be set by the MARK target
654 To compile it as a module, choose M here. If unsure, say N.
656 config NETFILTER_XT_MATCH_MULTIPORT
657 tristate '"multiport" Multiple port match support'
658 depends on NETFILTER_ADVANCED
660 Multiport matching allows you to match TCP or UDP packets based on
661 a series of source or destination ports: normally a rule can only
662 match a single range of ports.
664 To compile it as a module, choose M here. If unsure, say N.
666 config NETFILTER_XT_MATCH_OWNER
667 tristate '"owner" match support'
668 depends on NETFILTER_ADVANCED
670 Socket owner matching allows you to match locally-generated packets
671 based on who created the socket: the user or group. It is also
672 possible to check whether a socket actually exists.
674 config NETFILTER_XT_MATCH_POLICY
675 tristate 'IPsec "policy" match support'
677 default m if NETFILTER_ADVANCED=n
679 Policy matching allows you to match packets based on the
680 IPsec policy that was used during decapsulation/will
681 be used during encapsulation.
683 To compile it as a module, choose M here. If unsure, say N.
685 config NETFILTER_XT_MATCH_PHYSDEV
686 tristate '"physdev" match support'
687 depends on BRIDGE && BRIDGE_NETFILTER
688 depends on NETFILTER_ADVANCED
690 Physdev packet matching matches against the physical bridge ports
691 the IP packet arrived on or will leave by.
693 To compile it as a module, choose M here. If unsure, say N.
695 config NETFILTER_XT_MATCH_PKTTYPE
696 tristate '"pkttype" packet type match support'
697 depends on NETFILTER_ADVANCED
699 Packet type matching allows you to match a packet by
700 its "class", eg. BROADCAST, MULTICAST, ...
703 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
705 To compile it as a module, choose M here. If unsure, say N.
707 config NETFILTER_XT_MATCH_QUOTA
708 tristate '"quota" match support'
709 depends on NETFILTER_ADVANCED
711 This option adds a `quota' match, which allows to match on a
714 If you want to compile it as a module, say M here and read
715 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
717 config NETFILTER_XT_MATCH_RATEEST
718 tristate '"rateest" match support'
719 depends on NETFILTER_ADVANCED
720 select NETFILTER_XT_TARGET_RATEEST
722 This option adds a `rateest' match, which allows to match on the
723 rate estimated by the RATEEST target.
725 To compile it as a module, choose M here. If unsure, say N.
727 config NETFILTER_XT_MATCH_REALM
728 tristate '"realm" match support'
729 depends on NETFILTER_ADVANCED
732 This option adds a `realm' match, which allows you to use the realm
733 key from the routing subsystem inside iptables.
735 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
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_RECENT
742 tristate '"recent" match support'
743 depends on NETFILTER_ADVANCED
745 This match is used for creating one or many lists of recently
746 used addresses and then matching against that/those list(s).
748 Short options are available by using 'iptables -m recent -h'
749 Official Website: <http://snowman.net/projects/ipt_recent/>
751 config NETFILTER_XT_MATCH_RECENT_PROC_COMPAT
752 bool 'Enable obsolete /proc/net/ipt_recent'
753 depends on NETFILTER_XT_MATCH_RECENT && PROC_FS
755 This option enables the old /proc/net/ipt_recent interface,
756 which has been obsoleted by /proc/net/xt_recent.
758 config NETFILTER_XT_MATCH_SCTP
759 tristate '"sctp" protocol match support (EXPERIMENTAL)'
760 depends on EXPERIMENTAL
761 depends on NETFILTER_ADVANCED
764 With this option enabled, you will be able to use the
765 `sctp' match in order to match on SCTP source/destination ports
766 and SCTP chunk types.
768 If you want to compile it as a module, say M here and read
769 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
771 config NETFILTER_XT_MATCH_SOCKET
772 tristate '"socket" match support (EXPERIMENTAL)'
773 depends on EXPERIMENTAL
774 depends on NETFILTER_TPROXY
775 depends on NETFILTER_XTABLES
776 depends on NETFILTER_ADVANCED
777 select NF_DEFRAG_IPV4
779 This option adds a `socket' match, which can be used to match
780 packets for which a TCP or UDP socket lookup finds a valid socket.
781 It can be used in combination with the MARK target and policy
782 routing to implement full featured non-locally bound sockets.
784 To compile it as a module, choose M here. If unsure, say N.
786 config NETFILTER_XT_MATCH_STATE
787 tristate '"state" match support'
788 depends on NF_CONNTRACK
789 default m if NETFILTER_ADVANCED=n
791 Connection state matching allows you to match packets based on their
792 relationship to a tracked connection (ie. previous packets). This
793 is a powerful tool for packet classification.
795 To compile it as a module, choose M here. If unsure, say N.
797 config NETFILTER_XT_MATCH_STATISTIC
798 tristate '"statistic" match support'
799 depends on NETFILTER_ADVANCED
801 This option adds a `statistic' match, which allows you to match
802 on packets periodically or randomly with a given percentage.
804 To compile it as a module, choose M here. If unsure, say N.
806 config NETFILTER_XT_MATCH_STRING
807 tristate '"string" match support'
808 depends on NETFILTER_ADVANCED
810 select TEXTSEARCH_KMP
812 select TEXTSEARCH_FSM
814 This option adds a `string' match, which allows you to look for
815 pattern matchings in packets.
817 To compile it as a module, choose M here. If unsure, say N.
819 config NETFILTER_XT_MATCH_TCPMSS
820 tristate '"tcpmss" match support'
821 depends on NETFILTER_ADVANCED
823 This option adds a `tcpmss' match, which allows you to examine the
824 MSS value of TCP SYN packets, which control the maximum packet size
827 To compile it as a module, choose M here. If unsure, say N.
829 config NETFILTER_XT_MATCH_TIME
830 tristate '"time" match support'
831 depends on NETFILTER_ADVANCED
833 This option adds a "time" match, which allows you to match based on
834 the packet arrival time (at the machine which netfilter is running)
835 on) or departure time/date (for locally generated packets).
837 If you say Y here, try `iptables -m time --help` for
840 If you want to compile it as a module, say M here.
843 config NETFILTER_XT_MATCH_U32
844 tristate '"u32" match support'
845 depends on NETFILTER_ADVANCED
847 u32 allows you to extract quantities of up to 4 bytes from a packet,
848 AND them with specified masks, shift them by specified amounts and
849 test whether the results are in any of a set of specified ranges.
850 The specification of what to extract is general enough to skip over
851 headers with lengths stored in the packet, as in IP or TCP header
854 Details and examples are in the kernel module source.
856 endif # NETFILTER_XTABLES
860 source "net/netfilter/ipvs/Kconfig"