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"
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_SCTP
124 tristate 'SCTP protocol on new connection tracking support (EXPERIMENTAL)'
125 depends on EXPERIMENTAL && NF_CONNTRACK
128 With this option enabled, the layer 3 independent connection
129 tracking code will be able to do state tracking on SCTP connections.
131 If you want to compile it as a module, say M here and read
132 Documentation/modules.txt. If unsure, say `N'.
134 config NF_CONNTRACK_FTP
135 tristate "FTP support on new connection tracking (EXPERIMENTAL)"
136 depends on EXPERIMENTAL && NF_CONNTRACK
138 Tracking FTP connections is problematic: special helpers are
139 required for tracking them, and doing masquerading and other forms
140 of Network Address Translation on them.
142 This is FTP support on Layer 3 independent connection tracking.
143 Layer 3 independent connection tracking is experimental scheme
144 which generalize ip_conntrack to support other layer 3 protocols.
146 To compile it as a module, choose M here. If unsure, say N.
149 tristate 'Connection tracking netlink interface (EXPERIMENTAL)'
150 depends on EXPERIMENTAL && NF_CONNTRACK && NETFILTER_NETLINK
151 depends on NF_CONNTRACK!=y || NETFILTER_NETLINK!=m
153 This option enables support for a netlink-based userspace interface
155 config NETFILTER_XTABLES
156 tristate "Netfilter Xtables support (required for ip_tables)"
158 This is required if you intend to use any of ip_tables,
159 ip6_tables or arp_tables.
161 # alphabetically ordered list of targets
163 config NETFILTER_XT_TARGET_CLASSIFY
164 tristate '"CLASSIFY" target support'
165 depends on NETFILTER_XTABLES
167 This option adds a `CLASSIFY' target, which enables the user to set
168 the priority of a packet. Some qdiscs can use this value for
169 classification, among these are:
171 atm, cbq, dsmark, pfifo_fast, htb, prio
173 To compile it as a module, choose M here. If unsure, say N.
175 config NETFILTER_XT_TARGET_CONNMARK
176 tristate '"CONNMARK" target support'
177 depends on NETFILTER_XTABLES
178 depends on IP_NF_MANGLE || IP6_NF_MANGLE
179 depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
181 This option adds a `CONNMARK' target, which allows one to manipulate
182 the connection mark value. Similar to the MARK target, but
183 affects the connection mark value rather than the packet mark value.
185 If you want to compile it as a module, say M here and read
186 <file:Documentation/modules.txt>. The module will be called
187 ipt_CONNMARK.o. If unsure, say `N'.
189 config NETFILTER_XT_TARGET_DSCP
190 tristate '"DSCP" target support'
191 depends on NETFILTER_XTABLES
192 depends on IP_NF_MANGLE || IP6_NF_MANGLE
194 This option adds a `DSCP' target, which allows you to manipulate
195 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
197 The DSCP field can have any value between 0x0 and 0x3f inclusive.
199 To compile it as a module, choose M here. If unsure, say N.
201 config NETFILTER_XT_TARGET_MARK
202 tristate '"MARK" target support'
203 depends on NETFILTER_XTABLES
205 This option adds a `MARK' target, which allows you to create rules
206 in the `mangle' table which alter the netfilter mark (nfmark) field
207 associated with the packet prior to routing. This can change
208 the routing method (see `Use netfilter MARK value as routing
209 key') and can also be used by other subsystems to change their
212 To compile it as a module, choose M here. If unsure, say N.
214 config NETFILTER_XT_TARGET_NFQUEUE
215 tristate '"NFQUEUE" target Support'
216 depends on NETFILTER_XTABLES
218 This target replaced the old obsolete QUEUE target.
220 As opposed to QUEUE, it supports 65535 different queues,
223 To compile it as a module, choose M here. If unsure, say N.
225 config NETFILTER_XT_TARGET_NFLOG
226 tristate '"NFLOG" target support'
227 depends on NETFILTER_XTABLES
229 This option enables the NFLOG target, which allows to LOG
230 messages through the netfilter logging API, which can use
231 either the old LOG target, the old ULOG target or nfnetlink_log
234 To compile it as a module, choose M here. If unsure, say N.
236 config NETFILTER_XT_TARGET_NOTRACK
237 tristate '"NOTRACK" target support'
238 depends on NETFILTER_XTABLES
239 depends on IP_NF_RAW || IP6_NF_RAW
240 depends on IP_NF_CONNTRACK || NF_CONNTRACK
242 The NOTRACK target allows a select rule to specify
243 which packets *not* to enter the conntrack/NAT
244 subsystem with all the consequences (no ICMP error tracking,
245 no protocol helpers for the selected packets).
247 If you want to compile it as a module, say M here and read
248 <file:Documentation/modules.txt>. If unsure, say `N'.
250 config NETFILTER_XT_TARGET_SECMARK
251 tristate '"SECMARK" target support'
252 depends on NETFILTER_XTABLES && NETWORK_SECMARK
254 The SECMARK target allows security marking of network
255 packets, for use with security subsystems.
257 To compile it as a module, choose M here. If unsure, say N.
259 config NETFILTER_XT_TARGET_CONNSECMARK
260 tristate '"CONNSECMARK" target support'
261 depends on NETFILTER_XTABLES && \
262 ((NF_CONNTRACK && NF_CONNTRACK_SECMARK) || \
263 (IP_NF_CONNTRACK && IP_NF_CONNTRACK_SECMARK))
265 The CONNSECMARK target copies security markings from packets
266 to connections, and restores security markings from connections
267 to packets (if the packets are not already marked). This would
268 normally be used in conjunction with the SECMARK target.
270 To compile it as a module, choose M here. If unsure, say N.
272 config NETFILTER_XT_MATCH_COMMENT
273 tristate '"comment" match support'
274 depends on NETFILTER_XTABLES
276 This option adds a `comment' dummy-match, which allows you to put
277 comments in your iptables ruleset.
279 If you want to compile it as a module, say M here and read
280 <file:Documentation/modules.txt>. If unsure, say `N'.
282 config NETFILTER_XT_MATCH_CONNBYTES
283 tristate '"connbytes" per-connection counter match support'
284 depends on NETFILTER_XTABLES
285 depends on (IP_NF_CONNTRACK && IP_NF_CT_ACCT) || (NF_CT_ACCT && NF_CONNTRACK)
287 This option adds a `connbytes' match, which allows you to match the
288 number of bytes and/or packets for each direction within a connection.
290 If you want to compile it as a module, say M here and read
291 <file:Documentation/modules.txt>. If unsure, say `N'.
293 config NETFILTER_XT_MATCH_CONNMARK
294 tristate '"connmark" connection mark match support'
295 depends on NETFILTER_XTABLES
296 depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
298 This option adds a `connmark' match, which allows you to match the
299 connection mark value previously set for the session by `CONNMARK'.
301 If you want to compile it as a module, say M here and read
302 <file:Documentation/modules.txt>. The module will be called
303 ipt_connmark.o. If unsure, say `N'.
305 config NETFILTER_XT_MATCH_CONNTRACK
306 tristate '"conntrack" connection tracking match support'
307 depends on NETFILTER_XTABLES
308 depends on IP_NF_CONNTRACK || NF_CONNTRACK
310 This is a general conntrack match module, a superset of the state match.
312 It allows matching on additional conntrack information, which is
313 useful in complex configurations, such as NAT gateways with multiple
314 internet links or tunnels.
316 To compile it as a module, choose M here. If unsure, say N.
318 config NETFILTER_XT_MATCH_DCCP
319 tristate '"DCCP" protocol match support'
320 depends on NETFILTER_XTABLES
322 With this option enabled, you will be able to use the iptables
323 `dccp' match in order to match on DCCP source/destination ports
326 If you want to compile it as a module, say M here and read
327 <file:Documentation/modules.txt>. If unsure, say `N'.
329 config NETFILTER_XT_MATCH_DSCP
330 tristate '"DSCP" match support'
331 depends on NETFILTER_XTABLES
333 This option adds a `DSCP' match, which allows you to match against
334 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
336 The DSCP field can have any value between 0x0 and 0x3f inclusive.
338 To compile it as a module, choose M here. If unsure, say N.
340 config NETFILTER_XT_MATCH_ESP
341 tristate '"ESP" match support'
342 depends on NETFILTER_XTABLES
344 This match extension allows you to match a range of SPIs
345 inside ESP header of IPSec packets.
347 To compile it as a module, choose M here. If unsure, say N.
349 config NETFILTER_XT_MATCH_HELPER
350 tristate '"helper" match support'
351 depends on NETFILTER_XTABLES
352 depends on IP_NF_CONNTRACK || NF_CONNTRACK
354 Helper matching allows you to match packets in dynamic connections
355 tracked by a conntrack-helper, ie. ip_conntrack_ftp
357 To compile it as a module, choose M here. If unsure, say Y.
359 config NETFILTER_XT_MATCH_LENGTH
360 tristate '"length" match support'
361 depends on NETFILTER_XTABLES
363 This option allows you to match the length of a packet against a
364 specific value or range of values.
366 To compile it as a module, choose M here. If unsure, say N.
368 config NETFILTER_XT_MATCH_LIMIT
369 tristate '"limit" match support'
370 depends on NETFILTER_XTABLES
372 limit matching allows you to control the rate at which a rule can be
373 matched: mainly useful in combination with the LOG target ("LOG
374 target support", below) and to avoid some Denial of Service attacks.
376 To compile it as a module, choose M here. If unsure, say N.
378 config NETFILTER_XT_MATCH_MAC
379 tristate '"mac" address match support'
380 depends on NETFILTER_XTABLES
382 MAC matching allows you to match packets based on the source
383 Ethernet address of the packet.
385 To compile it as a module, choose M here. If unsure, say N.
387 config NETFILTER_XT_MATCH_MARK
388 tristate '"mark" match support'
389 depends on NETFILTER_XTABLES
391 Netfilter mark matching allows you to match packets based on the
392 `nfmark' value in the packet. This can be set by the MARK target
395 To compile it as a module, choose M here. If unsure, say N.
397 config NETFILTER_XT_MATCH_POLICY
398 tristate 'IPsec "policy" match support'
399 depends on NETFILTER_XTABLES && XFRM
401 Policy matching allows you to match packets based on the
402 IPsec policy that was used during decapsulation/will
403 be used during encapsulation.
405 To compile it as a module, choose M here. If unsure, say N.
407 config NETFILTER_XT_MATCH_MULTIPORT
408 tristate "Multiple port match support"
409 depends on NETFILTER_XTABLES
411 Multiport matching allows you to match TCP or UDP packets based on
412 a series of source or destination ports: normally a rule can only
413 match a single range of ports.
415 To compile it as a module, choose M here. If unsure, say N.
417 config NETFILTER_XT_MATCH_PHYSDEV
418 tristate '"physdev" match support'
419 depends on NETFILTER_XTABLES && BRIDGE && BRIDGE_NETFILTER
421 Physdev packet matching matches against the physical bridge ports
422 the IP packet arrived on or will leave by.
424 To compile it as a module, choose M here. If unsure, say N.
426 config NETFILTER_XT_MATCH_PKTTYPE
427 tristate '"pkttype" packet type match support'
428 depends on NETFILTER_XTABLES
430 Packet type matching allows you to match a packet by
431 its "class", eg. BROADCAST, MULTICAST, ...
434 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
436 To compile it as a module, choose M here. If unsure, say N.
438 config NETFILTER_XT_MATCH_QUOTA
439 tristate '"quota" match support'
440 depends on NETFILTER_XTABLES
442 This option adds a `quota' match, which allows to match on a
445 If you want to compile it as a module, say M here and read
446 <file:Documentation/modules.txt>. If unsure, say `N'.
448 config NETFILTER_XT_MATCH_REALM
449 tristate '"realm" match support'
450 depends on NETFILTER_XTABLES
453 This option adds a `realm' match, which allows you to use the realm
454 key from the routing subsystem inside iptables.
456 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
459 If you want to compile it as a module, say M here and read
460 <file:Documentation/modules.txt>. If unsure, say `N'.
462 config NETFILTER_XT_MATCH_SCTP
463 tristate '"sctp" protocol match support (EXPERIMENTAL)'
464 depends on NETFILTER_XTABLES && EXPERIMENTAL
466 With this option enabled, you will be able to use the
467 `sctp' match in order to match on SCTP source/destination ports
468 and SCTP chunk types.
470 If you want to compile it as a module, say M here and read
471 <file:Documentation/modules.txt>. If unsure, say `N'.
473 config NETFILTER_XT_MATCH_STATE
474 tristate '"state" match support'
475 depends on NETFILTER_XTABLES
476 depends on IP_NF_CONNTRACK || NF_CONNTRACK
478 Connection state matching allows you to match packets based on their
479 relationship to a tracked connection (ie. previous packets). This
480 is a powerful tool for packet classification.
482 To compile it as a module, choose M here. If unsure, say N.
484 config NETFILTER_XT_MATCH_STATISTIC
485 tristate '"statistic" match support'
486 depends on NETFILTER_XTABLES
488 This option adds a `statistic' match, which allows you to match
489 on packets periodically or randomly with a given percentage.
491 To compile it as a module, choose M here. If unsure, say N.
493 config NETFILTER_XT_MATCH_STRING
494 tristate '"string" match support'
495 depends on NETFILTER_XTABLES
497 select TEXTSEARCH_KMP
499 select TEXTSEARCH_FSM
501 This option adds a `string' match, which allows you to look for
502 pattern matchings in packets.
504 To compile it as a module, choose M here. If unsure, say N.
506 config NETFILTER_XT_MATCH_TCPMSS
507 tristate '"tcpmss" match support'
508 depends on NETFILTER_XTABLES
510 This option adds a `tcpmss' match, which allows you to examine the
511 MSS value of TCP SYN packets, which control the maximum packet size
514 To compile it as a module, choose M here. If unsure, say N.
516 config NETFILTER_XT_MATCH_HASHLIMIT
517 tristate '"hashlimit" match support'
518 depends on NETFILTER_XTABLES
520 This option adds a `hashlimit' match.
522 As opposed to `limit', this match dynamically creates a hash table
523 of limit buckets, based on your selection of source/destination
524 addresses and/or ports.
526 It enables you to express policies like `10kpps for any given
527 destination address' or `500pps from any given source address'