1 menu "Core Netfilter Configuration"
2 depends on NET && NETFILTER
4 config NETFILTER_NETLINK
5 tristate "Netfilter netlink interface"
7 If this option is enabled, the kernel will include support
8 for the new netfilter netlink interface.
10 config NETFILTER_NETLINK_QUEUE
11 tristate "Netfilter NFQUEUE over NFNETLINK interface"
12 depends on NETFILTER_NETLINK
14 If this option is enabled, the kernel will include support
15 for queueing packets via NFNETLINK.
17 config NETFILTER_NETLINK_LOG
18 tristate "Netfilter LOG over NFNETLINK interface"
19 depends on NETFILTER_NETLINK
21 If this option is enabled, the kernel will include support
22 for logging packets via NFNETLINK.
24 This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
25 and is also scheduled to replace the old syslog-based ipt_LOG
28 config NF_CONNTRACK_ENABLED
29 tristate "Netfilter connection tracking support"
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 prompt "Netfilter connection tracking support"
44 depends on NF_CONNTRACK_ENABLED
46 config NF_CONNTRACK_SUPPORT
47 bool "Layer 3 Independent Connection tracking (EXPERIMENTAL)"
48 depends on EXPERIMENTAL
50 Layer 3 independent connection tracking is experimental scheme
51 which generalize ip_conntrack to support other layer 3 protocols.
53 This is required to do Masquerading or other kinds of Network
54 Address Translation (except for Fast NAT). It can also be used to
55 enhance packet filtering (see `Connection state match support'
58 config IP_NF_CONNTRACK_SUPPORT
59 bool "Layer 3 Dependent Connection tracking (OBSOLETE)"
61 The old, Layer 3 dependent ip_conntrack subsystem of netfilter.
63 This is required to do Masquerading or other kinds of Network
64 Address Translation (except for Fast NAT). It can also be used to
65 enhance packet filtering (see `Connection state match support'
72 default m if NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=m
73 default y if NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=y
75 config IP_NF_CONNTRACK
77 default m if IP_NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=m
78 default y if IP_NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=y
81 bool "Connection tracking flow accounting"
82 depends on NF_CONNTRACK
84 If this option is enabled, the connection tracking code will
85 keep per-flow packet and byte counters.
87 Those counters can be used for flow-based accounting or the
92 config NF_CONNTRACK_MARK
93 bool 'Connection mark tracking support'
94 depends on NF_CONNTRACK
96 This option enables support for connection marks, used by the
97 `CONNMARK' target and `connmark' match. Similar to the mark value
98 of packets, but this mark value is kept in the conntrack session
99 instead of the individual packets.
101 config NF_CONNTRACK_SECMARK
102 bool 'Connection tracking security mark support'
103 depends on NF_CONNTRACK && NETWORK_SECMARK
105 This option enables security markings to be applied to
106 connections. Typically they are copied to connections from
107 packets using the CONNSECMARK target and copied back from
108 connections to packets with the same target, with the packets
109 being originally labeled via SECMARK.
113 config NF_CONNTRACK_EVENTS
114 bool "Connection tracking events (EXPERIMENTAL)"
115 depends on EXPERIMENTAL && NF_CONNTRACK
117 If this option is enabled, the connection tracking code will
118 provide a notifier chain that can be used by other kernel code
119 to get notified about changes in the connection tracking state.
123 config NF_CT_PROTO_GRE
125 depends on EXPERIMENTAL && NF_CONNTRACK
127 config NF_CT_PROTO_SCTP
128 tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
129 depends on EXPERIMENTAL && NF_CONNTRACK
132 With this option enabled, the layer 3 independent connection
133 tracking code will be able to do state tracking on SCTP connections.
135 If you want to compile it as a module, say M here and read
136 Documentation/modules.txt. If unsure, say `N'.
138 config NF_CONNTRACK_AMANDA
139 tristate "Amanda backup protocol support (EXPERIMENTAL)"
140 depends on EXPERIMENTAL && NF_CONNTRACK
142 select TEXTSEARCH_KMP
144 If you are running the Amanda backup package <http://www.amanda.org/>
145 on this machine or machines that will be MASQUERADED through this
146 machine, then you may want to enable this feature. This allows the
147 connection tracking and natting code to allow the sub-channels that
148 Amanda requires for communication of the backup data, messages and
151 To compile it as a module, choose M here. If unsure, say N.
153 config NF_CONNTRACK_FTP
154 tristate "FTP protocol support (EXPERIMENTAL)"
155 depends on EXPERIMENTAL && NF_CONNTRACK
157 Tracking FTP connections is problematic: special helpers are
158 required for tracking them, and doing masquerading and other forms
159 of Network Address Translation on them.
161 This is FTP support on Layer 3 independent connection tracking.
162 Layer 3 independent connection tracking is experimental scheme
163 which generalize ip_conntrack to support other layer 3 protocols.
165 To compile it as a module, choose M here. If unsure, say N.
167 config NF_CONNTRACK_H323
168 tristate "H.323 protocol support (EXPERIMENTAL)"
169 depends on EXPERIMENTAL && NF_CONNTRACK
171 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
172 important VoIP protocols, it is widely used by voice hardware and
173 software including voice gateways, IP phones, Netmeeting, OpenPhone,
176 With this module you can support H.323 on a connection tracking/NAT
179 This module supports RAS, Fast Start, H.245 Tunnelling, Call
180 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
181 whiteboard, file transfer, etc. For more information, please
182 visit http://nath323.sourceforge.net/.
184 To compile it as a module, choose M here. If unsure, say N.
186 config NF_CONNTRACK_IRC
187 tristate "IRC protocol support (EXPERIMENTAL)"
188 depends on EXPERIMENTAL && NF_CONNTRACK
190 There is a commonly-used extension to IRC called
191 Direct Client-to-Client Protocol (DCC). This enables users to send
192 files to each other, and also chat to each other without the need
193 of a server. DCC Sending is used anywhere you send files over IRC,
194 and DCC Chat is most commonly used by Eggdrop bots. If you are
195 using NAT, this extension will enable you to send files and initiate
196 chats. Note that you do NOT need this extension to get files or
197 have others initiate chats, or everything else in IRC.
199 To compile it as a module, choose M here. If unsure, say N.
201 config NF_CONNTRACK_NETBIOS_NS
202 tristate "NetBIOS name service protocol support (EXPERIMENTAL)"
203 depends on EXPERIMENTAL && NF_CONNTRACK
205 NetBIOS name service requests are sent as broadcast messages from an
206 unprivileged port and responded to with unicast messages to the
207 same port. This make them hard to firewall properly because connection
208 tracking doesn't deal with broadcasts. This helper tracks locally
209 originating NetBIOS name service requests and the corresponding
210 responses. It relies on correct IP address configuration, specifically
211 netmask and broadcast address. When properly configured, the output
212 of "ip address show" should look similar to this:
214 $ ip -4 address show eth0
215 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
216 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
218 To compile it as a module, choose M here. If unsure, say N.
220 config NF_CONNTRACK_PPTP
221 tristate "PPtP protocol support (EXPERIMENTAL)"
222 depends on EXPERIMENTAL && NF_CONNTRACK
223 select NF_CT_PROTO_GRE
225 This module adds support for PPTP (Point to Point Tunnelling
226 Protocol, RFC2637) connection tracking and NAT.
228 If you are running PPTP sessions over a stateful firewall or NAT
229 box, you may want to enable this feature.
231 Please note that not all PPTP modes of operation are supported yet.
232 Specifically these limitations exist:
233 - Blindy assumes that control connections are always established
234 in PNS->PAC direction. This is a violation of RFC2637.
235 - Only supports a single call within each session
237 To compile it as a module, choose M here. If unsure, say N.
239 config NF_CONNTRACK_SIP
240 tristate "SIP protocol support (EXPERIMENTAL)"
241 depends on EXPERIMENTAL && NF_CONNTRACK
243 SIP is an application-layer control protocol that can establish,
244 modify, and terminate multimedia sessions (conferences) such as
245 Internet telephony calls. With the ip_conntrack_sip and
246 the nf_nat_sip modules you can support the protocol on a connection
247 tracking/NATing firewall.
249 To compile it as a module, choose M here. If unsure, say N.
251 config NF_CONNTRACK_TFTP
252 tristate "TFTP protocol support (EXPERIMENTAL)"
253 depends on EXPERIMENTAL && NF_CONNTRACK
255 TFTP connection tracking helper, this is required depending
256 on how restrictive your ruleset is.
257 If you are using a tftp client behind -j SNAT or -j MASQUERADING
260 To compile it as a module, choose M here. If unsure, say N.
263 tristate 'Connection tracking netlink interface (EXPERIMENTAL)'
264 depends on EXPERIMENTAL && NF_CONNTRACK && NETFILTER_NETLINK
265 depends on NF_CONNTRACK!=y || NETFILTER_NETLINK!=m
267 This option enables support for a netlink-based userspace interface
269 config NETFILTER_XTABLES
270 tristate "Netfilter Xtables support (required for ip_tables)"
272 This is required if you intend to use any of ip_tables,
273 ip6_tables or arp_tables.
275 # alphabetically ordered list of targets
277 config NETFILTER_XT_TARGET_CLASSIFY
278 tristate '"CLASSIFY" target support'
279 depends on NETFILTER_XTABLES
281 This option adds a `CLASSIFY' target, which enables the user to set
282 the priority of a packet. Some qdiscs can use this value for
283 classification, among these are:
285 atm, cbq, dsmark, pfifo_fast, htb, prio
287 To compile it as a module, choose M here. If unsure, say N.
289 config NETFILTER_XT_TARGET_CONNMARK
290 tristate '"CONNMARK" target support'
291 depends on NETFILTER_XTABLES
292 depends on IP_NF_MANGLE || IP6_NF_MANGLE
293 depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
295 This option adds a `CONNMARK' target, which allows one to manipulate
296 the connection mark value. Similar to the MARK target, but
297 affects the connection mark value rather than the packet mark value.
299 If you want to compile it as a module, say M here and read
300 <file:Documentation/modules.txt>. The module will be called
301 ipt_CONNMARK.o. If unsure, say `N'.
303 config NETFILTER_XT_TARGET_DSCP
304 tristate '"DSCP" target support'
305 depends on NETFILTER_XTABLES
306 depends on IP_NF_MANGLE || IP6_NF_MANGLE
308 This option adds a `DSCP' target, which allows you to manipulate
309 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
311 The DSCP field can have any value between 0x0 and 0x3f inclusive.
313 To compile it as a module, choose M here. If unsure, say N.
315 config NETFILTER_XT_TARGET_MARK
316 tristate '"MARK" target support'
317 depends on NETFILTER_XTABLES
319 This option adds a `MARK' target, which allows you to create rules
320 in the `mangle' table which alter the netfilter mark (nfmark) field
321 associated with the packet prior to routing. This can change
322 the routing method (see `Use netfilter MARK value as routing
323 key') and can also be used by other subsystems to change their
326 To compile it as a module, choose M here. If unsure, say N.
328 config NETFILTER_XT_TARGET_NFQUEUE
329 tristate '"NFQUEUE" target Support'
330 depends on NETFILTER_XTABLES
332 This target replaced the old obsolete QUEUE target.
334 As opposed to QUEUE, it supports 65535 different queues,
337 To compile it as a module, choose M here. If unsure, say N.
339 config NETFILTER_XT_TARGET_NFLOG
340 tristate '"NFLOG" target support'
341 depends on NETFILTER_XTABLES
343 This option enables the NFLOG target, which allows to LOG
344 messages through the netfilter logging API, which can use
345 either the old LOG target, the old ULOG target or nfnetlink_log
348 To compile it as a module, choose M here. If unsure, say N.
350 config NETFILTER_XT_TARGET_NOTRACK
351 tristate '"NOTRACK" target support'
352 depends on NETFILTER_XTABLES
353 depends on IP_NF_RAW || IP6_NF_RAW
354 depends on IP_NF_CONNTRACK || NF_CONNTRACK
356 The NOTRACK target allows a select rule to specify
357 which packets *not* to enter the conntrack/NAT
358 subsystem with all the consequences (no ICMP error tracking,
359 no protocol helpers for the selected packets).
361 If you want to compile it as a module, say M here and read
362 <file:Documentation/modules.txt>. If unsure, say `N'.
364 config NETFILTER_XT_TARGET_SECMARK
365 tristate '"SECMARK" target support'
366 depends on NETFILTER_XTABLES && NETWORK_SECMARK
368 The SECMARK target allows security marking of network
369 packets, for use with security subsystems.
371 To compile it as a module, choose M here. If unsure, say N.
373 config NETFILTER_XT_TARGET_CONNSECMARK
374 tristate '"CONNSECMARK" target support'
375 depends on NETFILTER_XTABLES && \
376 ((NF_CONNTRACK && NF_CONNTRACK_SECMARK) || \
377 (IP_NF_CONNTRACK && IP_NF_CONNTRACK_SECMARK))
379 The CONNSECMARK target copies security markings from packets
380 to connections, and restores security markings from connections
381 to packets (if the packets are not already marked). This would
382 normally be used in conjunction with the SECMARK target.
384 To compile it as a module, choose M here. If unsure, say N.
386 config NETFILTER_XT_MATCH_COMMENT
387 tristate '"comment" match support'
388 depends on NETFILTER_XTABLES
390 This option adds a `comment' dummy-match, which allows you to put
391 comments in your iptables ruleset.
393 If you want to compile it as a module, say M here and read
394 <file:Documentation/modules.txt>. If unsure, say `N'.
396 config NETFILTER_XT_MATCH_CONNBYTES
397 tristate '"connbytes" per-connection counter match support'
398 depends on NETFILTER_XTABLES
399 depends on (IP_NF_CONNTRACK && IP_NF_CT_ACCT) || (NF_CT_ACCT && NF_CONNTRACK)
401 This option adds a `connbytes' match, which allows you to match the
402 number of bytes and/or packets for each direction within a connection.
404 If you want to compile it as a module, say M here and read
405 <file:Documentation/modules.txt>. If unsure, say `N'.
407 config NETFILTER_XT_MATCH_CONNMARK
408 tristate '"connmark" connection mark match support'
409 depends on NETFILTER_XTABLES
410 depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
412 This option adds a `connmark' match, which allows you to match the
413 connection mark value previously set for the session by `CONNMARK'.
415 If you want to compile it as a module, say M here and read
416 <file:Documentation/modules.txt>. The module will be called
417 ipt_connmark.o. If unsure, say `N'.
419 config NETFILTER_XT_MATCH_CONNTRACK
420 tristate '"conntrack" connection tracking match support'
421 depends on NETFILTER_XTABLES
422 depends on IP_NF_CONNTRACK || NF_CONNTRACK
424 This is a general conntrack match module, a superset of the state match.
426 It allows matching on additional conntrack information, which is
427 useful in complex configurations, such as NAT gateways with multiple
428 internet links or tunnels.
430 To compile it as a module, choose M here. If unsure, say N.
432 config NETFILTER_XT_MATCH_DCCP
433 tristate '"DCCP" protocol match support'
434 depends on NETFILTER_XTABLES
436 With this option enabled, you will be able to use the iptables
437 `dccp' match in order to match on DCCP source/destination ports
440 If you want to compile it as a module, say M here and read
441 <file:Documentation/modules.txt>. If unsure, say `N'.
443 config NETFILTER_XT_MATCH_DSCP
444 tristate '"DSCP" match support'
445 depends on NETFILTER_XTABLES
447 This option adds a `DSCP' match, which allows you to match against
448 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
450 The DSCP field can have any value between 0x0 and 0x3f inclusive.
452 To compile it as a module, choose M here. If unsure, say N.
454 config NETFILTER_XT_MATCH_ESP
455 tristate '"ESP" match support'
456 depends on NETFILTER_XTABLES
458 This match extension allows you to match a range of SPIs
459 inside ESP header of IPSec packets.
461 To compile it as a module, choose M here. If unsure, say N.
463 config NETFILTER_XT_MATCH_HELPER
464 tristate '"helper" match support'
465 depends on NETFILTER_XTABLES
466 depends on IP_NF_CONNTRACK || NF_CONNTRACK
468 Helper matching allows you to match packets in dynamic connections
469 tracked by a conntrack-helper, ie. ip_conntrack_ftp
471 To compile it as a module, choose M here. If unsure, say Y.
473 config NETFILTER_XT_MATCH_LENGTH
474 tristate '"length" match support'
475 depends on NETFILTER_XTABLES
477 This option allows you to match the length of a packet against a
478 specific value or range of values.
480 To compile it as a module, choose M here. If unsure, say N.
482 config NETFILTER_XT_MATCH_LIMIT
483 tristate '"limit" match support'
484 depends on NETFILTER_XTABLES
486 limit matching allows you to control the rate at which a rule can be
487 matched: mainly useful in combination with the LOG target ("LOG
488 target support", below) and to avoid some Denial of Service attacks.
490 To compile it as a module, choose M here. If unsure, say N.
492 config NETFILTER_XT_MATCH_MAC
493 tristate '"mac" address match support'
494 depends on NETFILTER_XTABLES
496 MAC matching allows you to match packets based on the source
497 Ethernet address of the packet.
499 To compile it as a module, choose M here. If unsure, say N.
501 config NETFILTER_XT_MATCH_MARK
502 tristate '"mark" match support'
503 depends on NETFILTER_XTABLES
505 Netfilter mark matching allows you to match packets based on the
506 `nfmark' value in the packet. This can be set by the MARK target
509 To compile it as a module, choose M here. If unsure, say N.
511 config NETFILTER_XT_MATCH_POLICY
512 tristate 'IPsec "policy" match support'
513 depends on NETFILTER_XTABLES && XFRM
515 Policy matching allows you to match packets based on the
516 IPsec policy that was used during decapsulation/will
517 be used during encapsulation.
519 To compile it as a module, choose M here. If unsure, say N.
521 config NETFILTER_XT_MATCH_MULTIPORT
522 tristate "Multiple port match support"
523 depends on NETFILTER_XTABLES
525 Multiport matching allows you to match TCP or UDP packets based on
526 a series of source or destination ports: normally a rule can only
527 match a single range of ports.
529 To compile it as a module, choose M here. If unsure, say N.
531 config NETFILTER_XT_MATCH_PHYSDEV
532 tristate '"physdev" match support'
533 depends on NETFILTER_XTABLES && BRIDGE && BRIDGE_NETFILTER
535 Physdev packet matching matches against the physical bridge ports
536 the IP packet arrived on or will leave by.
538 To compile it as a module, choose M here. If unsure, say N.
540 config NETFILTER_XT_MATCH_PKTTYPE
541 tristate '"pkttype" packet type match support'
542 depends on NETFILTER_XTABLES
544 Packet type matching allows you to match a packet by
545 its "class", eg. BROADCAST, MULTICAST, ...
548 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
550 To compile it as a module, choose M here. If unsure, say N.
552 config NETFILTER_XT_MATCH_QUOTA
553 tristate '"quota" match support'
554 depends on NETFILTER_XTABLES
556 This option adds a `quota' match, which allows to match on a
559 If you want to compile it as a module, say M here and read
560 <file:Documentation/modules.txt>. If unsure, say `N'.
562 config NETFILTER_XT_MATCH_REALM
563 tristate '"realm" match support'
564 depends on NETFILTER_XTABLES
567 This option adds a `realm' match, which allows you to use the realm
568 key from the routing subsystem inside iptables.
570 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
573 If you want to compile it as a module, say M here and read
574 <file:Documentation/modules.txt>. If unsure, say `N'.
576 config NETFILTER_XT_MATCH_SCTP
577 tristate '"sctp" protocol match support (EXPERIMENTAL)'
578 depends on NETFILTER_XTABLES && EXPERIMENTAL
580 With this option enabled, you will be able to use the
581 `sctp' match in order to match on SCTP source/destination ports
582 and SCTP chunk types.
584 If you want to compile it as a module, say M here and read
585 <file:Documentation/modules.txt>. If unsure, say `N'.
587 config NETFILTER_XT_MATCH_STATE
588 tristate '"state" match support'
589 depends on NETFILTER_XTABLES
590 depends on IP_NF_CONNTRACK || NF_CONNTRACK
592 Connection state matching allows you to match packets based on their
593 relationship to a tracked connection (ie. previous packets). This
594 is a powerful tool for packet classification.
596 To compile it as a module, choose M here. If unsure, say N.
598 config NETFILTER_XT_MATCH_STATISTIC
599 tristate '"statistic" match support'
600 depends on NETFILTER_XTABLES
602 This option adds a `statistic' match, which allows you to match
603 on packets periodically or randomly with a given percentage.
605 To compile it as a module, choose M here. If unsure, say N.
607 config NETFILTER_XT_MATCH_STRING
608 tristate '"string" match support'
609 depends on NETFILTER_XTABLES
611 select TEXTSEARCH_KMP
613 select TEXTSEARCH_FSM
615 This option adds a `string' match, which allows you to look for
616 pattern matchings in packets.
618 To compile it as a module, choose M here. If unsure, say N.
620 config NETFILTER_XT_MATCH_TCPMSS
621 tristate '"tcpmss" match support'
622 depends on NETFILTER_XTABLES
624 This option adds a `tcpmss' match, which allows you to examine the
625 MSS value of TCP SYN packets, which control the maximum packet size
628 To compile it as a module, choose M here. If unsure, say N.
630 config NETFILTER_XT_MATCH_HASHLIMIT
631 tristate '"hashlimit" match support'
632 depends on NETFILTER_XTABLES
634 This option adds a `hashlimit' match.
636 As opposed to `limit', this match dynamically creates a hash table
637 of limit buckets, based on your selection of source/destination
638 addresses and/or ports.
640 It enables you to express policies like `10kpps for any given
641 destination address' or `500pps from any given source address'