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1 menu "Core Netfilter Configuration"
2 depends on NET && INET && NETFILTER
3
4 config NETFILTER_INGRESS
5 bool "Netfilter ingress support"
6 default y
7 select NET_INGRESS
8 help
9 This allows you to classify packets from ingress using the Netfilter
10 infrastructure.
11
12 config NETFILTER_NETLINK
13 tristate
14
15 config NETFILTER_NETLINK_ACCT
16 tristate "Netfilter NFACCT over NFNETLINK interface"
17 depends on NETFILTER_ADVANCED
18 select NETFILTER_NETLINK
19 help
20 If this option is enabled, the kernel will include support
21 for extended accounting via NFNETLINK.
22
23 config NETFILTER_NETLINK_QUEUE
24 tristate "Netfilter NFQUEUE over NFNETLINK interface"
25 depends on NETFILTER_ADVANCED
26 select NETFILTER_NETLINK
27 help
28 If this option is enabled, the kernel will include support
29 for queueing packets via NFNETLINK.
30
31 config NETFILTER_NETLINK_LOG
32 tristate "Netfilter LOG over NFNETLINK interface"
33 default m if NETFILTER_ADVANCED=n
34 select NETFILTER_NETLINK
35 help
36 If this option is enabled, the kernel will include support
37 for logging packets via NFNETLINK.
38
39 This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
40 and is also scheduled to replace the old syslog-based ipt_LOG
41 and ip6t_LOG modules.
42
43 config NF_CONNTRACK
44 tristate "Netfilter connection tracking support"
45 default m if NETFILTER_ADVANCED=n
46 help
47 Connection tracking keeps a record of what packets have passed
48 through your machine, in order to figure out how they are related
49 into connections.
50
51 This is required to do Masquerading or other kinds of Network
52 Address Translation. It can also be used to enhance packet
53 filtering (see `Connection state match support' below).
54
55 To compile it as a module, choose M here. If unsure, say N.
56
57 config NF_LOG_COMMON
58 tristate
59
60 if NF_CONNTRACK
61
62 config NF_CONNTRACK_MARK
63 bool 'Connection mark tracking support'
64 depends on NETFILTER_ADVANCED
65 help
66 This option enables support for connection marks, used by the
67 `CONNMARK' target and `connmark' match. Similar to the mark value
68 of packets, but this mark value is kept in the conntrack session
69 instead of the individual packets.
70
71 config NF_CONNTRACK_SECMARK
72 bool 'Connection tracking security mark support'
73 depends on NETWORK_SECMARK
74 default m if NETFILTER_ADVANCED=n
75 help
76 This option enables security markings to be applied to
77 connections. Typically they are copied to connections from
78 packets using the CONNSECMARK target and copied back from
79 connections to packets with the same target, with the packets
80 being originally labeled via SECMARK.
81
82 If unsure, say 'N'.
83
84 config NF_CONNTRACK_ZONES
85 bool 'Connection tracking zones'
86 depends on NETFILTER_ADVANCED
87 depends on NETFILTER_XT_TARGET_CT
88 help
89 This option enables support for connection tracking zones.
90 Normally, each connection needs to have a unique system wide
91 identity. Connection tracking zones allow to have multiple
92 connections using the same identity, as long as they are
93 contained in different zones.
94
95 If unsure, say `N'.
96
97 config NF_CONNTRACK_PROCFS
98 bool "Supply CT list in procfs (OBSOLETE)"
99 default y
100 depends on PROC_FS
101 ---help---
102 This option enables for the list of known conntrack entries
103 to be shown in procfs under net/netfilter/nf_conntrack. This
104 is considered obsolete in favor of using the conntrack(8)
105 tool which uses Netlink.
106
107 config NF_CONNTRACK_EVENTS
108 bool "Connection tracking events"
109 depends on NETFILTER_ADVANCED
110 help
111 If this option is enabled, the connection tracking code will
112 provide a notifier chain that can be used by other kernel code
113 to get notified about changes in the connection tracking state.
114
115 If unsure, say `N'.
116
117 config NF_CONNTRACK_TIMEOUT
118 bool 'Connection tracking timeout'
119 depends on NETFILTER_ADVANCED
120 help
121 This option enables support for connection tracking timeout
122 extension. This allows you to attach timeout policies to flow
123 via the CT target.
124
125 If unsure, say `N'.
126
127 config NF_CONNTRACK_TIMESTAMP
128 bool 'Connection tracking timestamping'
129 depends on NETFILTER_ADVANCED
130 help
131 This option enables support for connection tracking timestamping.
132 This allows you to store the flow start-time and to obtain
133 the flow-stop time (once it has been destroyed) via Connection
134 tracking events.
135
136 If unsure, say `N'.
137
138 config NF_CONNTRACK_LABELS
139 bool
140 help
141 This option enables support for assigning user-defined flag bits
142 to connection tracking entries. It selected by the connlabel match.
143
144 config NF_CT_PROTO_DCCP
145 tristate 'DCCP protocol connection tracking support'
146 depends on NETFILTER_ADVANCED
147 default IP_DCCP
148 help
149 With this option enabled, the layer 3 independent connection
150 tracking code will be able to do state tracking on DCCP connections.
151
152 If unsure, say 'N'.
153
154 config NF_CT_PROTO_GRE
155 tristate
156
157 config NF_CT_PROTO_SCTP
158 tristate 'SCTP protocol connection tracking support'
159 depends on NETFILTER_ADVANCED
160 default IP_SCTP
161 help
162 With this option enabled, the layer 3 independent connection
163 tracking code will be able to do state tracking on SCTP connections.
164
165 If you want to compile it as a module, say M here and read
166 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
167
168 config NF_CT_PROTO_UDPLITE
169 tristate 'UDP-Lite protocol connection tracking support'
170 depends on NETFILTER_ADVANCED
171 help
172 With this option enabled, the layer 3 independent connection
173 tracking code will be able to do state tracking on UDP-Lite
174 connections.
175
176 To compile it as a module, choose M here. If unsure, say N.
177
178 config NF_CONNTRACK_AMANDA
179 tristate "Amanda backup protocol support"
180 depends on NETFILTER_ADVANCED
181 select TEXTSEARCH
182 select TEXTSEARCH_KMP
183 help
184 If you are running the Amanda backup package <http://www.amanda.org/>
185 on this machine or machines that will be MASQUERADED through this
186 machine, then you may want to enable this feature. This allows the
187 connection tracking and natting code to allow the sub-channels that
188 Amanda requires for communication of the backup data, messages and
189 index.
190
191 To compile it as a module, choose M here. If unsure, say N.
192
193 config NF_CONNTRACK_FTP
194 tristate "FTP protocol support"
195 default m if NETFILTER_ADVANCED=n
196 help
197 Tracking FTP connections is problematic: special helpers are
198 required for tracking them, and doing masquerading and other forms
199 of Network Address Translation on them.
200
201 This is FTP support on Layer 3 independent connection tracking.
202 Layer 3 independent connection tracking is experimental scheme
203 which generalize ip_conntrack to support other layer 3 protocols.
204
205 To compile it as a module, choose M here. If unsure, say N.
206
207 config NF_CONNTRACK_H323
208 tristate "H.323 protocol support"
209 depends on IPV6 || IPV6=n
210 depends on NETFILTER_ADVANCED
211 help
212 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
213 important VoIP protocols, it is widely used by voice hardware and
214 software including voice gateways, IP phones, Netmeeting, OpenPhone,
215 Gnomemeeting, etc.
216
217 With this module you can support H.323 on a connection tracking/NAT
218 firewall.
219
220 This module supports RAS, Fast Start, H.245 Tunnelling, Call
221 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
222 whiteboard, file transfer, etc. For more information, please
223 visit http://nath323.sourceforge.net/.
224
225 To compile it as a module, choose M here. If unsure, say N.
226
227 config NF_CONNTRACK_IRC
228 tristate "IRC protocol support"
229 default m if NETFILTER_ADVANCED=n
230 help
231 There is a commonly-used extension to IRC called
232 Direct Client-to-Client Protocol (DCC). This enables users to send
233 files to each other, and also chat to each other without the need
234 of a server. DCC Sending is used anywhere you send files over IRC,
235 and DCC Chat is most commonly used by Eggdrop bots. If you are
236 using NAT, this extension will enable you to send files and initiate
237 chats. Note that you do NOT need this extension to get files or
238 have others initiate chats, or everything else in IRC.
239
240 To compile it as a module, choose M here. If unsure, say N.
241
242 config NF_CONNTRACK_BROADCAST
243 tristate
244
245 config NF_CONNTRACK_NETBIOS_NS
246 tristate "NetBIOS name service protocol support"
247 select NF_CONNTRACK_BROADCAST
248 help
249 NetBIOS name service requests are sent as broadcast messages from an
250 unprivileged port and responded to with unicast messages to the
251 same port. This make them hard to firewall properly because connection
252 tracking doesn't deal with broadcasts. This helper tracks locally
253 originating NetBIOS name service requests and the corresponding
254 responses. It relies on correct IP address configuration, specifically
255 netmask and broadcast address. When properly configured, the output
256 of "ip address show" should look similar to this:
257
258 $ ip -4 address show eth0
259 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
260 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
261
262 To compile it as a module, choose M here. If unsure, say N.
263
264 config NF_CONNTRACK_SNMP
265 tristate "SNMP service protocol support"
266 depends on NETFILTER_ADVANCED
267 select NF_CONNTRACK_BROADCAST
268 help
269 SNMP service requests are sent as broadcast messages from an
270 unprivileged port and responded to with unicast messages to the
271 same port. This make them hard to firewall properly because connection
272 tracking doesn't deal with broadcasts. This helper tracks locally
273 originating SNMP service requests and the corresponding
274 responses. It relies on correct IP address configuration, specifically
275 netmask and broadcast address.
276
277 To compile it as a module, choose M here. If unsure, say N.
278
279 config NF_CONNTRACK_PPTP
280 tristate "PPtP protocol support"
281 depends on NETFILTER_ADVANCED
282 select NF_CT_PROTO_GRE
283 help
284 This module adds support for PPTP (Point to Point Tunnelling
285 Protocol, RFC2637) connection tracking and NAT.
286
287 If you are running PPTP sessions over a stateful firewall or NAT
288 box, you may want to enable this feature.
289
290 Please note that not all PPTP modes of operation are supported yet.
291 Specifically these limitations exist:
292 - Blindly assumes that control connections are always established
293 in PNS->PAC direction. This is a violation of RFC2637.
294 - Only supports a single call within each session
295
296 To compile it as a module, choose M here. If unsure, say N.
297
298 config NF_CONNTRACK_SANE
299 tristate "SANE protocol support"
300 depends on NETFILTER_ADVANCED
301 help
302 SANE is a protocol for remote access to scanners as implemented
303 by the 'saned' daemon. Like FTP, it uses separate control and
304 data connections.
305
306 With this module you can support SANE on a connection tracking
307 firewall.
308
309 To compile it as a module, choose M here. If unsure, say N.
310
311 config NF_CONNTRACK_SIP
312 tristate "SIP protocol support"
313 default m if NETFILTER_ADVANCED=n
314 help
315 SIP is an application-layer control protocol that can establish,
316 modify, and terminate multimedia sessions (conferences) such as
317 Internet telephony calls. With the ip_conntrack_sip and
318 the nf_nat_sip modules you can support the protocol on a connection
319 tracking/NATing firewall.
320
321 To compile it as a module, choose M here. If unsure, say N.
322
323 config NF_CONNTRACK_TFTP
324 tristate "TFTP protocol support"
325 depends on NETFILTER_ADVANCED
326 help
327 TFTP connection tracking helper, this is required depending
328 on how restrictive your ruleset is.
329 If you are using a tftp client behind -j SNAT or -j MASQUERADING
330 you will need this.
331
332 To compile it as a module, choose M here. If unsure, say N.
333
334 config NF_CT_NETLINK
335 tristate 'Connection tracking netlink interface'
336 select NETFILTER_NETLINK
337 default m if NETFILTER_ADVANCED=n
338 help
339 This option enables support for a netlink-based userspace interface
340
341 config NF_CT_NETLINK_TIMEOUT
342 tristate 'Connection tracking timeout tuning via Netlink'
343 select NETFILTER_NETLINK
344 depends on NETFILTER_ADVANCED
345 help
346 This option enables support for connection tracking timeout
347 fine-grain tuning. This allows you to attach specific timeout
348 policies to flows, instead of using the global timeout policy.
349
350 If unsure, say `N'.
351
352 config NF_CT_NETLINK_HELPER
353 tristate 'Connection tracking helpers in user-space via Netlink'
354 select NETFILTER_NETLINK
355 depends on NF_CT_NETLINK
356 depends on NETFILTER_NETLINK_QUEUE
357 depends on NETFILTER_NETLINK_GLUE_CT
358 depends on NETFILTER_ADVANCED
359 help
360 This option enables the user-space connection tracking helpers
361 infrastructure.
362
363 If unsure, say `N'.
364
365 config NETFILTER_NETLINK_GLUE_CT
366 bool "NFQUEUE and NFLOG integration with Connection Tracking"
367 default n
368 depends on (NETFILTER_NETLINK_QUEUE || NETFILTER_NETLINK_LOG) && NF_CT_NETLINK
369 help
370 If this option is enabled, NFQUEUE and NFLOG can include
371 Connection Tracking information together with the packet is
372 the enqueued via NFNETLINK.
373
374 config NF_NAT
375 tristate
376
377 config NF_NAT_NEEDED
378 bool
379 depends on NF_NAT
380 default y
381
382 config NF_NAT_PROTO_DCCP
383 tristate
384 depends on NF_NAT && NF_CT_PROTO_DCCP
385 default NF_NAT && NF_CT_PROTO_DCCP
386
387 config NF_NAT_PROTO_UDPLITE
388 tristate
389 depends on NF_NAT && NF_CT_PROTO_UDPLITE
390 default NF_NAT && NF_CT_PROTO_UDPLITE
391
392 config NF_NAT_PROTO_SCTP
393 tristate
394 default NF_NAT && NF_CT_PROTO_SCTP
395 depends on NF_NAT && NF_CT_PROTO_SCTP
396 select LIBCRC32C
397
398 config NF_NAT_AMANDA
399 tristate
400 depends on NF_CONNTRACK && NF_NAT
401 default NF_NAT && NF_CONNTRACK_AMANDA
402
403 config NF_NAT_FTP
404 tristate
405 depends on NF_CONNTRACK && NF_NAT
406 default NF_NAT && NF_CONNTRACK_FTP
407
408 config NF_NAT_IRC
409 tristate
410 depends on NF_CONNTRACK && NF_NAT
411 default NF_NAT && NF_CONNTRACK_IRC
412
413 config NF_NAT_SIP
414 tristate
415 depends on NF_CONNTRACK && NF_NAT
416 default NF_NAT && NF_CONNTRACK_SIP
417
418 config NF_NAT_TFTP
419 tristate
420 depends on NF_CONNTRACK && NF_NAT
421 default NF_NAT && NF_CONNTRACK_TFTP
422
423 config NF_NAT_REDIRECT
424 tristate "IPv4/IPv6 redirect support"
425 depends on NF_NAT
426 help
427 This is the kernel functionality to redirect packets to local
428 machine through NAT.
429
430 config NETFILTER_SYNPROXY
431 tristate
432
433 endif # NF_CONNTRACK
434
435 config NF_TABLES
436 select NETFILTER_NETLINK
437 tristate "Netfilter nf_tables support"
438 help
439 nftables is the new packet classification framework that intends to
440 replace the existing {ip,ip6,arp,eb}_tables infrastructure. It
441 provides a pseudo-state machine with an extensible instruction-set
442 (also known as expressions) that the userspace 'nft' utility
443 (http://www.netfilter.org/projects/nftables) uses to build the
444 rule-set. It also comes with the generic set infrastructure that
445 allows you to construct mappings between matchings and actions
446 for performance lookups.
447
448 To compile it as a module, choose M here.
449
450 if NF_TABLES
451
452 config NF_TABLES_INET
453 depends on IPV6
454 select NF_TABLES_IPV4
455 select NF_TABLES_IPV6
456 tristate "Netfilter nf_tables mixed IPv4/IPv6 tables support"
457 help
458 This option enables support for a mixed IPv4/IPv6 "inet" table.
459
460 config NF_TABLES_NETDEV
461 tristate "Netfilter nf_tables netdev tables support"
462 help
463 This option enables support for the "netdev" table.
464
465 config NFT_EXTHDR
466 tristate "Netfilter nf_tables IPv6 exthdr module"
467 help
468 This option adds the "exthdr" expression that you can use to match
469 IPv6 extension headers.
470
471 config NFT_META
472 tristate "Netfilter nf_tables meta module"
473 help
474 This option adds the "meta" expression that you can use to match and
475 to set packet metainformation such as the packet mark.
476
477 config NFT_CT
478 depends on NF_CONNTRACK
479 tristate "Netfilter nf_tables conntrack module"
480 help
481 This option adds the "meta" expression that you can use to match
482 connection tracking information such as the flow state.
483
484 config NFT_RBTREE
485 tristate "Netfilter nf_tables rbtree set module"
486 help
487 This option adds the "rbtree" set type (Red Black tree) that is used
488 to build interval-based sets.
489
490 config NFT_HASH
491 tristate "Netfilter nf_tables hash set module"
492 help
493 This option adds the "hash" set type that is used to build one-way
494 mappings between matchings and actions.
495
496 config NFT_COUNTER
497 tristate "Netfilter nf_tables counter module"
498 help
499 This option adds the "counter" expression that you can use to
500 include packet and byte counters in a rule.
501
502 config NFT_LOG
503 tristate "Netfilter nf_tables log module"
504 help
505 This option adds the "log" expression that you can use to log
506 packets matching some criteria.
507
508 config NFT_LIMIT
509 tristate "Netfilter nf_tables limit module"
510 help
511 This option adds the "limit" expression that you can use to
512 ratelimit rule matchings.
513
514 config NFT_MASQ
515 depends on NF_CONNTRACK
516 depends on NF_NAT
517 tristate "Netfilter nf_tables masquerade support"
518 help
519 This option adds the "masquerade" expression that you can use
520 to perform NAT in the masquerade flavour.
521
522 config NFT_REDIR
523 depends on NF_CONNTRACK
524 depends on NF_NAT
525 tristate "Netfilter nf_tables redirect support"
526 help
527 This options adds the "redirect" expression that you can use
528 to perform NAT in the redirect flavour.
529
530 config NFT_NAT
531 depends on NF_CONNTRACK
532 select NF_NAT
533 tristate "Netfilter nf_tables nat module"
534 help
535 This option adds the "nat" expression that you can use to perform
536 typical Network Address Translation (NAT) packet transformations.
537
538 config NFT_QUEUE
539 depends on NETFILTER_NETLINK_QUEUE
540 tristate "Netfilter nf_tables queue module"
541 help
542 This is required if you intend to use the userspace queueing
543 infrastructure (also known as NFQUEUE) from nftables.
544
545 config NFT_REJECT
546 default m if NETFILTER_ADVANCED=n
547 tristate "Netfilter nf_tables reject support"
548 help
549 This option adds the "reject" expression that you can use to
550 explicitly deny and notify via TCP reset/ICMP informational errors
551 unallowed traffic.
552
553 config NFT_REJECT_INET
554 depends on NF_TABLES_INET
555 default NFT_REJECT
556 tristate
557
558 config NFT_COMPAT
559 depends on NETFILTER_XTABLES
560 tristate "Netfilter x_tables over nf_tables module"
561 help
562 This is required if you intend to use any of existing
563 x_tables match/target extensions over the nf_tables
564 framework.
565
566 endif # NF_TABLES
567
568 config NETFILTER_XTABLES
569 tristate "Netfilter Xtables support (required for ip_tables)"
570 default m if NETFILTER_ADVANCED=n
571 help
572 This is required if you intend to use any of ip_tables,
573 ip6_tables or arp_tables.
574
575 if NETFILTER_XTABLES
576
577 comment "Xtables combined modules"
578
579 config NETFILTER_XT_MARK
580 tristate 'nfmark target and match support'
581 default m if NETFILTER_ADVANCED=n
582 ---help---
583 This option adds the "MARK" target and "mark" match.
584
585 Netfilter mark matching allows you to match packets based on the
586 "nfmark" value in the packet.
587 The target allows you to create rules in the "mangle" table which alter
588 the netfilter mark (nfmark) field associated with the packet.
589
590 Prior to routing, the nfmark can influence the routing method (see
591 "Use netfilter MARK value as routing key") and can also be used by
592 other subsystems to change their behavior.
593
594 config NETFILTER_XT_CONNMARK
595 tristate 'ctmark target and match support'
596 depends on NF_CONNTRACK
597 depends on NETFILTER_ADVANCED
598 select NF_CONNTRACK_MARK
599 ---help---
600 This option adds the "CONNMARK" target and "connmark" match.
601
602 Netfilter allows you to store a mark value per connection (a.k.a.
603 ctmark), similarly to the packet mark (nfmark). Using this
604 target and match, you can set and match on this mark.
605
606 config NETFILTER_XT_SET
607 tristate 'set target and match support'
608 depends on IP_SET
609 depends on NETFILTER_ADVANCED
610 help
611 This option adds the "SET" target and "set" match.
612
613 Using this target and match, you can add/delete and match
614 elements in the sets created by ipset(8).
615
616 To compile it as a module, choose M here. If unsure, say N.
617
618 # alphabetically ordered list of targets
619
620 comment "Xtables targets"
621
622 config NETFILTER_XT_TARGET_AUDIT
623 tristate "AUDIT target support"
624 depends on AUDIT
625 depends on NETFILTER_ADVANCED
626 ---help---
627 This option adds a 'AUDIT' target, which can be used to create
628 audit records for packets dropped/accepted.
629
630 To compileit as a module, choose M here. If unsure, say N.
631
632 config NETFILTER_XT_TARGET_CHECKSUM
633 tristate "CHECKSUM target support"
634 depends on IP_NF_MANGLE || IP6_NF_MANGLE
635 depends on NETFILTER_ADVANCED
636 ---help---
637 This option adds a `CHECKSUM' target, which can be used in the iptables mangle
638 table.
639
640 You can use this target to compute and fill in the checksum in
641 a packet that lacks a checksum. This is particularly useful,
642 if you need to work around old applications such as dhcp clients,
643 that do not work well with checksum offloads, but don't want to disable
644 checksum offload in your device.
645
646 To compile it as a module, choose M here. If unsure, say N.
647
648 config NETFILTER_XT_TARGET_CLASSIFY
649 tristate '"CLASSIFY" target support'
650 depends on NETFILTER_ADVANCED
651 help
652 This option adds a `CLASSIFY' target, which enables the user to set
653 the priority of a packet. Some qdiscs can use this value for
654 classification, among these are:
655
656 atm, cbq, dsmark, pfifo_fast, htb, prio
657
658 To compile it as a module, choose M here. If unsure, say N.
659
660 config NETFILTER_XT_TARGET_CONNMARK
661 tristate '"CONNMARK" target support'
662 depends on NF_CONNTRACK
663 depends on NETFILTER_ADVANCED
664 select NETFILTER_XT_CONNMARK
665 ---help---
666 This is a backwards-compat option for the user's convenience
667 (e.g. when running oldconfig). It selects
668 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
669
670 config NETFILTER_XT_TARGET_CONNSECMARK
671 tristate '"CONNSECMARK" target support'
672 depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
673 default m if NETFILTER_ADVANCED=n
674 help
675 The CONNSECMARK target copies security markings from packets
676 to connections, and restores security markings from connections
677 to packets (if the packets are not already marked). This would
678 normally be used in conjunction with the SECMARK target.
679
680 To compile it as a module, choose M here. If unsure, say N.
681
682 config NETFILTER_XT_TARGET_CT
683 tristate '"CT" target support'
684 depends on NF_CONNTRACK
685 depends on IP_NF_RAW || IP6_NF_RAW
686 depends on NETFILTER_ADVANCED
687 help
688 This options adds a `CT' target, which allows to specify initial
689 connection tracking parameters like events to be delivered and
690 the helper to be used.
691
692 To compile it as a module, choose M here. If unsure, say N.
693
694 config NETFILTER_XT_TARGET_DSCP
695 tristate '"DSCP" and "TOS" target support'
696 depends on IP_NF_MANGLE || IP6_NF_MANGLE
697 depends on NETFILTER_ADVANCED
698 help
699 This option adds a `DSCP' target, which allows you to manipulate
700 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
701
702 The DSCP field can have any value between 0x0 and 0x3f inclusive.
703
704 It also adds the "TOS" target, which allows you to create rules in
705 the "mangle" table which alter the Type Of Service field of an IPv4
706 or the Priority field of an IPv6 packet, prior to routing.
707
708 To compile it as a module, choose M here. If unsure, say N.
709
710 config NETFILTER_XT_TARGET_HL
711 tristate '"HL" hoplimit target support'
712 depends on IP_NF_MANGLE || IP6_NF_MANGLE
713 depends on NETFILTER_ADVANCED
714 ---help---
715 This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
716 targets, which enable the user to change the
717 hoplimit/time-to-live value of the IP header.
718
719 While it is safe to decrement the hoplimit/TTL value, the
720 modules also allow to increment and set the hoplimit value of
721 the header to arbitrary values. This is EXTREMELY DANGEROUS
722 since you can easily create immortal packets that loop
723 forever on the network.
724
725 config NETFILTER_XT_TARGET_HMARK
726 tristate '"HMARK" target support'
727 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
728 depends on NETFILTER_ADVANCED
729 ---help---
730 This option adds the "HMARK" target.
731
732 The target allows you to create rules in the "raw" and "mangle" tables
733 which set the skbuff mark by means of hash calculation within a given
734 range. The nfmark can influence the routing method (see "Use netfilter
735 MARK value as routing key") and can also be used by other subsystems to
736 change their behaviour.
737
738 To compile it as a module, choose M here. If unsure, say N.
739
740 config NETFILTER_XT_TARGET_IDLETIMER
741 tristate "IDLETIMER target support"
742 depends on NETFILTER_ADVANCED
743 help
744
745 This option adds the `IDLETIMER' target. Each matching packet
746 resets the timer associated with label specified when the rule is
747 added. When the timer expires, it triggers a sysfs notification.
748 The remaining time for expiration can be read via sysfs.
749
750 To compile it as a module, choose M here. If unsure, say N.
751
752 config NETFILTER_XT_TARGET_LED
753 tristate '"LED" target support'
754 depends on LEDS_CLASS && LEDS_TRIGGERS
755 depends on NETFILTER_ADVANCED
756 help
757 This option adds a `LED' target, which allows you to blink LEDs in
758 response to particular packets passing through your machine.
759
760 This can be used to turn a spare LED into a network activity LED,
761 which only flashes in response to FTP transfers, for example. Or
762 you could have an LED which lights up for a minute or two every time
763 somebody connects to your machine via SSH.
764
765 You will need support for the "led" class to make this work.
766
767 To create an LED trigger for incoming SSH traffic:
768 iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
769
770 Then attach the new trigger to an LED on your system:
771 echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
772
773 For more information on the LEDs available on your system, see
774 Documentation/leds/leds-class.txt
775
776 config NETFILTER_XT_TARGET_LOG
777 tristate "LOG target support"
778 select NF_LOG_COMMON
779 select NF_LOG_IPV4
780 select NF_LOG_IPV6 if IPV6
781 default m if NETFILTER_ADVANCED=n
782 help
783 This option adds a `LOG' target, which allows you to create rules in
784 any iptables table which records the packet header to the syslog.
785
786 To compile it as a module, choose M here. If unsure, say N.
787
788 config NETFILTER_XT_TARGET_MARK
789 tristate '"MARK" target support'
790 depends on NETFILTER_ADVANCED
791 select NETFILTER_XT_MARK
792 ---help---
793 This is a backwards-compat option for the user's convenience
794 (e.g. when running oldconfig). It selects
795 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
796
797 config NETFILTER_XT_NAT
798 tristate '"SNAT and DNAT" targets support'
799 depends on NF_NAT
800 ---help---
801 This option enables the SNAT and DNAT targets.
802
803 To compile it as a module, choose M here. If unsure, say N.
804
805 config NETFILTER_XT_TARGET_NETMAP
806 tristate '"NETMAP" target support'
807 depends on NF_NAT
808 ---help---
809 NETMAP is an implementation of static 1:1 NAT mapping of network
810 addresses. It maps the network address part, while keeping the host
811 address part intact.
812
813 To compile it as a module, choose M here. If unsure, say N.
814
815 config NETFILTER_XT_TARGET_NFLOG
816 tristate '"NFLOG" target support'
817 default m if NETFILTER_ADVANCED=n
818 select NETFILTER_NETLINK_LOG
819 help
820 This option enables the NFLOG target, which allows to LOG
821 messages through nfnetlink_log.
822
823 To compile it as a module, choose M here. If unsure, say N.
824
825 config NETFILTER_XT_TARGET_NFQUEUE
826 tristate '"NFQUEUE" target Support'
827 depends on NETFILTER_ADVANCED
828 select NETFILTER_NETLINK_QUEUE
829 help
830 This target replaced the old obsolete QUEUE target.
831
832 As opposed to QUEUE, it supports 65535 different queues,
833 not just one.
834
835 To compile it as a module, choose M here. If unsure, say N.
836
837 config NETFILTER_XT_TARGET_NOTRACK
838 tristate '"NOTRACK" target support (DEPRECATED)'
839 depends on NF_CONNTRACK
840 depends on IP_NF_RAW || IP6_NF_RAW
841 depends on NETFILTER_ADVANCED
842 select NETFILTER_XT_TARGET_CT
843
844 config NETFILTER_XT_TARGET_RATEEST
845 tristate '"RATEEST" target support'
846 depends on NETFILTER_ADVANCED
847 help
848 This option adds a `RATEEST' target, which allows to measure
849 rates similar to TC estimators. The `rateest' match can be
850 used to match on the measured rates.
851
852 To compile it as a module, choose M here. If unsure, say N.
853
854 config NETFILTER_XT_TARGET_REDIRECT
855 tristate "REDIRECT target support"
856 depends on NF_NAT
857 select NF_NAT_REDIRECT
858 ---help---
859 REDIRECT is a special case of NAT: all incoming connections are
860 mapped onto the incoming interface's address, causing the packets to
861 come to the local machine instead of passing through. This is
862 useful for transparent proxies.
863
864 To compile it as a module, choose M here. If unsure, say N.
865
866 config NETFILTER_XT_TARGET_TEE
867 tristate '"TEE" - packet cloning to alternate destination'
868 depends on NETFILTER_ADVANCED
869 depends on IPV6 || IPV6=n
870 depends on !NF_CONNTRACK || NF_CONNTRACK
871 select NF_DUP_IPV4
872 select NF_DUP_IPV6 if IP6_NF_IPTABLES
873 ---help---
874 This option adds a "TEE" target with which a packet can be cloned and
875 this clone be rerouted to another nexthop.
876
877 config NETFILTER_XT_TARGET_TPROXY
878 tristate '"TPROXY" target transparent proxying support'
879 depends on NETFILTER_XTABLES
880 depends on NETFILTER_ADVANCED
881 depends on IPV6 || IPV6=n
882 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
883 depends on IP_NF_MANGLE
884 select NF_DEFRAG_IPV4
885 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
886 help
887 This option adds a `TPROXY' target, which is somewhat similar to
888 REDIRECT. It can only be used in the mangle table and is useful
889 to redirect traffic to a transparent proxy. It does _not_ depend
890 on Netfilter connection tracking and NAT, unlike REDIRECT.
891 For it to work you will have to configure certain iptables rules
892 and use policy routing. For more information on how to set it up
893 see Documentation/networking/tproxy.txt.
894
895 To compile it as a module, choose M here. If unsure, say N.
896
897 config NETFILTER_XT_TARGET_TRACE
898 tristate '"TRACE" target support'
899 depends on IP_NF_RAW || IP6_NF_RAW
900 depends on NETFILTER_ADVANCED
901 help
902 The TRACE target allows you to mark packets so that the kernel
903 will log every rule which match the packets as those traverse
904 the tables, chains, rules.
905
906 If you want to compile it as a module, say M here and read
907 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
908
909 config NETFILTER_XT_TARGET_SECMARK
910 tristate '"SECMARK" target support'
911 depends on NETWORK_SECMARK
912 default m if NETFILTER_ADVANCED=n
913 help
914 The SECMARK target allows security marking of network
915 packets, for use with security subsystems.
916
917 To compile it as a module, choose M here. If unsure, say N.
918
919 config NETFILTER_XT_TARGET_TCPMSS
920 tristate '"TCPMSS" target support'
921 depends on IPV6 || IPV6=n
922 default m if NETFILTER_ADVANCED=n
923 ---help---
924 This option adds a `TCPMSS' target, which allows you to alter the
925 MSS value of TCP SYN packets, to control the maximum size for that
926 connection (usually limiting it to your outgoing interface's MTU
927 minus 40).
928
929 This is used to overcome criminally braindead ISPs or servers which
930 block ICMP Fragmentation Needed packets. The symptoms of this
931 problem are that everything works fine from your Linux
932 firewall/router, but machines behind it can never exchange large
933 packets:
934 1) Web browsers connect, then hang with no data received.
935 2) Small mail works fine, but large emails hang.
936 3) ssh works fine, but scp hangs after initial handshaking.
937
938 Workaround: activate this option and add a rule to your firewall
939 configuration like:
940
941 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
942 -j TCPMSS --clamp-mss-to-pmtu
943
944 To compile it as a module, choose M here. If unsure, say N.
945
946 config NETFILTER_XT_TARGET_TCPOPTSTRIP
947 tristate '"TCPOPTSTRIP" target support'
948 depends on IP_NF_MANGLE || IP6_NF_MANGLE
949 depends on NETFILTER_ADVANCED
950 help
951 This option adds a "TCPOPTSTRIP" target, which allows you to strip
952 TCP options from TCP packets.
953
954 # alphabetically ordered list of matches
955
956 comment "Xtables matches"
957
958 config NETFILTER_XT_MATCH_ADDRTYPE
959 tristate '"addrtype" address type match support'
960 default m if NETFILTER_ADVANCED=n
961 ---help---
962 This option allows you to match what routing thinks of an address,
963 eg. UNICAST, LOCAL, BROADCAST, ...
964
965 If you want to compile it as a module, say M here and read
966 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
967
968 config NETFILTER_XT_MATCH_BPF
969 tristate '"bpf" match support'
970 depends on NETFILTER_ADVANCED
971 help
972 BPF matching applies a linux socket filter to each packet and
973 accepts those for which the filter returns non-zero.
974
975 To compile it as a module, choose M here. If unsure, say N.
976
977 config NETFILTER_XT_MATCH_CGROUP
978 tristate '"control group" match support'
979 depends on NETFILTER_ADVANCED
980 depends on CGROUPS
981 select CGROUP_NET_CLASSID
982 ---help---
983 Socket/process control group matching allows you to match locally
984 generated packets based on which net_cls control group processes
985 belong to.
986
987 config NETFILTER_XT_MATCH_CLUSTER
988 tristate '"cluster" match support'
989 depends on NF_CONNTRACK
990 depends on NETFILTER_ADVANCED
991 ---help---
992 This option allows you to build work-load-sharing clusters of
993 network servers/stateful firewalls without having a dedicated
994 load-balancing router/server/switch. Basically, this match returns
995 true when the packet must be handled by this cluster node. Thus,
996 all nodes see all packets and this match decides which node handles
997 what packets. The work-load sharing algorithm is based on source
998 address hashing.
999
1000 If you say Y or M here, try `iptables -m cluster --help` for
1001 more information.
1002
1003 config NETFILTER_XT_MATCH_COMMENT
1004 tristate '"comment" match support'
1005 depends on NETFILTER_ADVANCED
1006 help
1007 This option adds a `comment' dummy-match, which allows you to put
1008 comments in your iptables ruleset.
1009
1010 If you want to compile it as a module, say M here and read
1011 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1012
1013 config NETFILTER_XT_MATCH_CONNBYTES
1014 tristate '"connbytes" per-connection counter match support'
1015 depends on NF_CONNTRACK
1016 depends on NETFILTER_ADVANCED
1017 help
1018 This option adds a `connbytes' match, which allows you to match the
1019 number of bytes and/or packets for each direction within a connection.
1020
1021 If you want to compile it as a module, say M here and read
1022 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1023
1024 config NETFILTER_XT_MATCH_CONNLABEL
1025 tristate '"connlabel" match support'
1026 select NF_CONNTRACK_LABELS
1027 depends on NF_CONNTRACK
1028 depends on NETFILTER_ADVANCED
1029 ---help---
1030 This match allows you to test and assign userspace-defined labels names
1031 to a connection. The kernel only stores bit values - mapping
1032 names to bits is done by userspace.
1033
1034 Unlike connmark, more than 32 flag bits may be assigned to a
1035 connection simultaneously.
1036
1037 config NETFILTER_XT_MATCH_CONNLIMIT
1038 tristate '"connlimit" match support'
1039 depends on NF_CONNTRACK
1040 depends on NETFILTER_ADVANCED
1041 ---help---
1042 This match allows you to match against the number of parallel
1043 connections to a server per client IP address (or address block).
1044
1045 config NETFILTER_XT_MATCH_CONNMARK
1046 tristate '"connmark" connection mark match support'
1047 depends on NF_CONNTRACK
1048 depends on NETFILTER_ADVANCED
1049 select NETFILTER_XT_CONNMARK
1050 ---help---
1051 This is a backwards-compat option for the user's convenience
1052 (e.g. when running oldconfig). It selects
1053 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
1054
1055 config NETFILTER_XT_MATCH_CONNTRACK
1056 tristate '"conntrack" connection tracking match support'
1057 depends on NF_CONNTRACK
1058 default m if NETFILTER_ADVANCED=n
1059 help
1060 This is a general conntrack match module, a superset of the state match.
1061
1062 It allows matching on additional conntrack information, which is
1063 useful in complex configurations, such as NAT gateways with multiple
1064 internet links or tunnels.
1065
1066 To compile it as a module, choose M here. If unsure, say N.
1067
1068 config NETFILTER_XT_MATCH_CPU
1069 tristate '"cpu" match support'
1070 depends on NETFILTER_ADVANCED
1071 help
1072 CPU matching allows you to match packets based on the CPU
1073 currently handling the packet.
1074
1075 To compile it as a module, choose M here. If unsure, say N.
1076
1077 config NETFILTER_XT_MATCH_DCCP
1078 tristate '"dccp" protocol match support'
1079 depends on NETFILTER_ADVANCED
1080 default IP_DCCP
1081 help
1082 With this option enabled, you will be able to use the iptables
1083 `dccp' match in order to match on DCCP source/destination ports
1084 and DCCP flags.
1085
1086 If you want to compile it as a module, say M here and read
1087 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1088
1089 config NETFILTER_XT_MATCH_DEVGROUP
1090 tristate '"devgroup" match support'
1091 depends on NETFILTER_ADVANCED
1092 help
1093 This options adds a `devgroup' match, which allows to match on the
1094 device group a network device is assigned to.
1095
1096 To compile it as a module, choose M here. If unsure, say N.
1097
1098 config NETFILTER_XT_MATCH_DSCP
1099 tristate '"dscp" and "tos" match support'
1100 depends on NETFILTER_ADVANCED
1101 help
1102 This option adds a `DSCP' match, which allows you to match against
1103 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
1104
1105 The DSCP field can have any value between 0x0 and 0x3f inclusive.
1106
1107 It will also add a "tos" match, which allows you to match packets
1108 based on the Type Of Service fields of the IPv4 packet (which share
1109 the same bits as DSCP).
1110
1111 To compile it as a module, choose M here. If unsure, say N.
1112
1113 config NETFILTER_XT_MATCH_ECN
1114 tristate '"ecn" match support'
1115 depends on NETFILTER_ADVANCED
1116 ---help---
1117 This option adds an "ECN" match, which allows you to match against
1118 the IPv4 and TCP header ECN fields.
1119
1120 To compile it as a module, choose M here. If unsure, say N.
1121
1122 config NETFILTER_XT_MATCH_ESP
1123 tristate '"esp" match support'
1124 depends on NETFILTER_ADVANCED
1125 help
1126 This match extension allows you to match a range of SPIs
1127 inside ESP header of IPSec packets.
1128
1129 To compile it as a module, choose M here. If unsure, say N.
1130
1131 config NETFILTER_XT_MATCH_HASHLIMIT
1132 tristate '"hashlimit" match support'
1133 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1134 depends on NETFILTER_ADVANCED
1135 help
1136 This option adds a `hashlimit' match.
1137
1138 As opposed to `limit', this match dynamically creates a hash table
1139 of limit buckets, based on your selection of source/destination
1140 addresses and/or ports.
1141
1142 It enables you to express policies like `10kpps for any given
1143 destination address' or `500pps from any given source address'
1144 with a single rule.
1145
1146 config NETFILTER_XT_MATCH_HELPER
1147 tristate '"helper" match support'
1148 depends on NF_CONNTRACK
1149 depends on NETFILTER_ADVANCED
1150 help
1151 Helper matching allows you to match packets in dynamic connections
1152 tracked by a conntrack-helper, ie. ip_conntrack_ftp
1153
1154 To compile it as a module, choose M here. If unsure, say Y.
1155
1156 config NETFILTER_XT_MATCH_HL
1157 tristate '"hl" hoplimit/TTL match support'
1158 depends on NETFILTER_ADVANCED
1159 ---help---
1160 HL matching allows you to match packets based on the hoplimit
1161 in the IPv6 header, or the time-to-live field in the IPv4
1162 header of the packet.
1163
1164 config NETFILTER_XT_MATCH_IPCOMP
1165 tristate '"ipcomp" match support'
1166 depends on NETFILTER_ADVANCED
1167 help
1168 This match extension allows you to match a range of CPIs(16 bits)
1169 inside IPComp header of IPSec packets.
1170
1171 To compile it as a module, choose M here. If unsure, say N.
1172
1173 config NETFILTER_XT_MATCH_IPRANGE
1174 tristate '"iprange" address range match support'
1175 depends on NETFILTER_ADVANCED
1176 ---help---
1177 This option adds a "iprange" match, which allows you to match based on
1178 an IP address range. (Normal iptables only matches on single addresses
1179 with an optional mask.)
1180
1181 If unsure, say M.
1182
1183 config NETFILTER_XT_MATCH_IPVS
1184 tristate '"ipvs" match support'
1185 depends on IP_VS
1186 depends on NETFILTER_ADVANCED
1187 depends on NF_CONNTRACK
1188 help
1189 This option allows you to match against IPVS properties of a packet.
1190
1191 If unsure, say N.
1192
1193 config NETFILTER_XT_MATCH_L2TP
1194 tristate '"l2tp" match support'
1195 depends on NETFILTER_ADVANCED
1196 default L2TP
1197 ---help---
1198 This option adds an "L2TP" match, which allows you to match against
1199 L2TP protocol header fields.
1200
1201 To compile it as a module, choose M here. If unsure, say N.
1202
1203 config NETFILTER_XT_MATCH_LENGTH
1204 tristate '"length" match support'
1205 depends on NETFILTER_ADVANCED
1206 help
1207 This option allows you to match the length of a packet against a
1208 specific value or range of values.
1209
1210 To compile it as a module, choose M here. If unsure, say N.
1211
1212 config NETFILTER_XT_MATCH_LIMIT
1213 tristate '"limit" match support'
1214 depends on NETFILTER_ADVANCED
1215 help
1216 limit matching allows you to control the rate at which a rule can be
1217 matched: mainly useful in combination with the LOG target ("LOG
1218 target support", below) and to avoid some Denial of Service attacks.
1219
1220 To compile it as a module, choose M here. If unsure, say N.
1221
1222 config NETFILTER_XT_MATCH_MAC
1223 tristate '"mac" address match support'
1224 depends on NETFILTER_ADVANCED
1225 help
1226 MAC matching allows you to match packets based on the source
1227 Ethernet address of the packet.
1228
1229 To compile it as a module, choose M here. If unsure, say N.
1230
1231 config NETFILTER_XT_MATCH_MARK
1232 tristate '"mark" match support'
1233 depends on NETFILTER_ADVANCED
1234 select NETFILTER_XT_MARK
1235 ---help---
1236 This is a backwards-compat option for the user's convenience
1237 (e.g. when running oldconfig). It selects
1238 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
1239
1240 config NETFILTER_XT_MATCH_MULTIPORT
1241 tristate '"multiport" Multiple port match support'
1242 depends on NETFILTER_ADVANCED
1243 help
1244 Multiport matching allows you to match TCP or UDP packets based on
1245 a series of source or destination ports: normally a rule can only
1246 match a single range of ports.
1247
1248 To compile it as a module, choose M here. If unsure, say N.
1249
1250 config NETFILTER_XT_MATCH_NFACCT
1251 tristate '"nfacct" match support'
1252 depends on NETFILTER_ADVANCED
1253 select NETFILTER_NETLINK_ACCT
1254 help
1255 This option allows you to use the extended accounting through
1256 nfnetlink_acct.
1257
1258 To compile it as a module, choose M here. If unsure, say N.
1259
1260 config NETFILTER_XT_MATCH_OSF
1261 tristate '"osf" Passive OS fingerprint match'
1262 depends on NETFILTER_ADVANCED && NETFILTER_NETLINK
1263 help
1264 This option selects the Passive OS Fingerprinting match module
1265 that allows to passively match the remote operating system by
1266 analyzing incoming TCP SYN packets.
1267
1268 Rules and loading software can be downloaded from
1269 http://www.ioremap.net/projects/osf
1270
1271 To compile it as a module, choose M here. If unsure, say N.
1272
1273 config NETFILTER_XT_MATCH_OWNER
1274 tristate '"owner" match support'
1275 depends on NETFILTER_ADVANCED
1276 ---help---
1277 Socket owner matching allows you to match locally-generated packets
1278 based on who created the socket: the user or group. It is also
1279 possible to check whether a socket actually exists.
1280
1281 config NETFILTER_XT_MATCH_POLICY
1282 tristate 'IPsec "policy" match support'
1283 depends on XFRM
1284 default m if NETFILTER_ADVANCED=n
1285 help
1286 Policy matching allows you to match packets based on the
1287 IPsec policy that was used during decapsulation/will
1288 be used during encapsulation.
1289
1290 To compile it as a module, choose M here. If unsure, say N.
1291
1292 config NETFILTER_XT_MATCH_PHYSDEV
1293 tristate '"physdev" match support'
1294 depends on BRIDGE && BRIDGE_NETFILTER
1295 depends on NETFILTER_ADVANCED
1296 help
1297 Physdev packet matching matches against the physical bridge ports
1298 the IP packet arrived on or will leave by.
1299
1300 To compile it as a module, choose M here. If unsure, say N.
1301
1302 config NETFILTER_XT_MATCH_PKTTYPE
1303 tristate '"pkttype" packet type match support'
1304 depends on NETFILTER_ADVANCED
1305 help
1306 Packet type matching allows you to match a packet by
1307 its "class", eg. BROADCAST, MULTICAST, ...
1308
1309 Typical usage:
1310 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
1311
1312 To compile it as a module, choose M here. If unsure, say N.
1313
1314 config NETFILTER_XT_MATCH_QUOTA
1315 tristate '"quota" match support'
1316 depends on NETFILTER_ADVANCED
1317 help
1318 This option adds a `quota' match, which allows to match on a
1319 byte counter.
1320
1321 If you want to compile it as a module, say M here and read
1322 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1323
1324 config NETFILTER_XT_MATCH_RATEEST
1325 tristate '"rateest" match support'
1326 depends on NETFILTER_ADVANCED
1327 select NETFILTER_XT_TARGET_RATEEST
1328 help
1329 This option adds a `rateest' match, which allows to match on the
1330 rate estimated by the RATEEST target.
1331
1332 To compile it as a module, choose M here. If unsure, say N.
1333
1334 config NETFILTER_XT_MATCH_REALM
1335 tristate '"realm" match support'
1336 depends on NETFILTER_ADVANCED
1337 select IP_ROUTE_CLASSID
1338 help
1339 This option adds a `realm' match, which allows you to use the realm
1340 key from the routing subsystem inside iptables.
1341
1342 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
1343 in tc world.
1344
1345 If you want to compile it as a module, say M here and read
1346 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1347
1348 config NETFILTER_XT_MATCH_RECENT
1349 tristate '"recent" match support'
1350 depends on NETFILTER_ADVANCED
1351 ---help---
1352 This match is used for creating one or many lists of recently
1353 used addresses and then matching against that/those list(s).
1354
1355 Short options are available by using 'iptables -m recent -h'
1356 Official Website: <http://snowman.net/projects/ipt_recent/>
1357
1358 config NETFILTER_XT_MATCH_SCTP
1359 tristate '"sctp" protocol match support'
1360 depends on NETFILTER_ADVANCED
1361 default IP_SCTP
1362 help
1363 With this option enabled, you will be able to use the
1364 `sctp' match in order to match on SCTP source/destination ports
1365 and SCTP chunk types.
1366
1367 If you want to compile it as a module, say M here and read
1368 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1369
1370 config NETFILTER_XT_MATCH_SOCKET
1371 tristate '"socket" match support'
1372 depends on NETFILTER_XTABLES
1373 depends on NETFILTER_ADVANCED
1374 depends on !NF_CONNTRACK || NF_CONNTRACK
1375 depends on IPV6 || IPV6=n
1376 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1377 select NF_DEFRAG_IPV4
1378 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES
1379 help
1380 This option adds a `socket' match, which can be used to match
1381 packets for which a TCP or UDP socket lookup finds a valid socket.
1382 It can be used in combination with the MARK target and policy
1383 routing to implement full featured non-locally bound sockets.
1384
1385 To compile it as a module, choose M here. If unsure, say N.
1386
1387 config NETFILTER_XT_MATCH_STATE
1388 tristate '"state" match support'
1389 depends on NF_CONNTRACK
1390 default m if NETFILTER_ADVANCED=n
1391 help
1392 Connection state matching allows you to match packets based on their
1393 relationship to a tracked connection (ie. previous packets). This
1394 is a powerful tool for packet classification.
1395
1396 To compile it as a module, choose M here. If unsure, say N.
1397
1398 config NETFILTER_XT_MATCH_STATISTIC
1399 tristate '"statistic" match support'
1400 depends on NETFILTER_ADVANCED
1401 help
1402 This option adds a `statistic' match, which allows you to match
1403 on packets periodically or randomly with a given percentage.
1404
1405 To compile it as a module, choose M here. If unsure, say N.
1406
1407 config NETFILTER_XT_MATCH_STRING
1408 tristate '"string" match support'
1409 depends on NETFILTER_ADVANCED
1410 select TEXTSEARCH
1411 select TEXTSEARCH_KMP
1412 select TEXTSEARCH_BM
1413 select TEXTSEARCH_FSM
1414 help
1415 This option adds a `string' match, which allows you to look for
1416 pattern matchings in packets.
1417
1418 To compile it as a module, choose M here. If unsure, say N.
1419
1420 config NETFILTER_XT_MATCH_TCPMSS
1421 tristate '"tcpmss" match support'
1422 depends on NETFILTER_ADVANCED
1423 help
1424 This option adds a `tcpmss' match, which allows you to examine the
1425 MSS value of TCP SYN packets, which control the maximum packet size
1426 for that connection.
1427
1428 To compile it as a module, choose M here. If unsure, say N.
1429
1430 config NETFILTER_XT_MATCH_TIME
1431 tristate '"time" match support'
1432 depends on NETFILTER_ADVANCED
1433 ---help---
1434 This option adds a "time" match, which allows you to match based on
1435 the packet arrival time (at the machine which netfilter is running)
1436 on) or departure time/date (for locally generated packets).
1437
1438 If you say Y here, try `iptables -m time --help` for
1439 more information.
1440
1441 If you want to compile it as a module, say M here.
1442 If unsure, say N.
1443
1444 config NETFILTER_XT_MATCH_U32
1445 tristate '"u32" match support'
1446 depends on NETFILTER_ADVANCED
1447 ---help---
1448 u32 allows you to extract quantities of up to 4 bytes from a packet,
1449 AND them with specified masks, shift them by specified amounts and
1450 test whether the results are in any of a set of specified ranges.
1451 The specification of what to extract is general enough to skip over
1452 headers with lengths stored in the packet, as in IP or TCP header
1453 lengths.
1454
1455 Details and examples are in the kernel module source.
1456
1457 endif # NETFILTER_XTABLES
1458
1459 endmenu
1460
1461 source "net/netfilter/ipset/Kconfig"
1462
1463 source "net/netfilter/ipvs/Kconfig"