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
29 tristate "Layer 3 Independent Connection tracking (EXPERIMENTAL)"
30 depends on EXPERIMENTAL && IP_NF_CONNTRACK=n
33 Connection tracking keeps a record of what packets have passed
34 through your machine, in order to figure out how they are related
37 Layer 3 independent connection tracking is experimental scheme
38 which generalize ip_conntrack to support other layer 3 protocols.
40 To compile it as a module, choose M here. If unsure, say N.
43 bool "Connection tracking flow accounting"
44 depends on NF_CONNTRACK
46 If this option is enabled, the connection tracking code will
47 keep per-flow packet and byte counters.
49 Those counters can be used for flow-based accounting or the
54 config NF_CONNTRACK_MARK
55 bool 'Connection mark tracking support'
56 depends on NF_CONNTRACK
58 This option enables support for connection marks, used by the
59 `CONNMARK' target and `connmark' match. Similar to the mark value
60 of packets, but this mark value is kept in the conntrack session
61 instead of the individual packets.
63 config NF_CONNTRACK_SECMARK
64 bool 'Connection tracking security mark support'
65 depends on NF_CONNTRACK && NETWORK_SECMARK
67 This option enables security markings to be applied to
68 connections. Typically they are copied to connections from
69 packets using the CONNSECMARK target and copied back from
70 connections to packets with the same target, with the packets
71 being originally labeled via SECMARK.
75 config NF_CONNTRACK_EVENTS
76 bool "Connection tracking events (EXPERIMENTAL)"
77 depends on EXPERIMENTAL && NF_CONNTRACK
79 If this option is enabled, the connection tracking code will
80 provide a notifier chain that can be used by other kernel code
81 to get notified about changes in the connection tracking state.
85 config NF_CT_PROTO_SCTP
86 tristate 'SCTP protocol on new connection tracking support (EXPERIMENTAL)'
87 depends on EXPERIMENTAL && NF_CONNTRACK
90 With this option enabled, the layer 3 independent connection
91 tracking code will be able to do state tracking on SCTP connections.
93 If you want to compile it as a module, say M here and read
94 Documentation/modules.txt. If unsure, say `N'.
96 config NF_CONNTRACK_FTP
97 tristate "FTP support on new connection tracking (EXPERIMENTAL)"
98 depends on EXPERIMENTAL && NF_CONNTRACK
100 Tracking FTP connections is problematic: special helpers are
101 required for tracking them, and doing masquerading and other forms
102 of Network Address Translation on them.
104 This is FTP support on Layer 3 independent connection tracking.
105 Layer 3 independent connection tracking is experimental scheme
106 which generalize ip_conntrack to support other layer 3 protocols.
108 To compile it as a module, choose M here. If unsure, say N.
111 tristate 'Connection tracking netlink interface (EXPERIMENTAL)'
112 depends on EXPERIMENTAL && NF_CONNTRACK && NETFILTER_NETLINK
113 depends on NF_CONNTRACK!=y || NETFILTER_NETLINK!=m
115 This option enables support for a netlink-based userspace interface
117 config NETFILTER_XTABLES
118 tristate "Netfilter Xtables support (required for ip_tables)"
120 This is required if you intend to use any of ip_tables,
121 ip6_tables or arp_tables.
123 # alphabetically ordered list of targets
125 config NETFILTER_XT_TARGET_CLASSIFY
126 tristate '"CLASSIFY" target support'
127 depends on NETFILTER_XTABLES
129 This option adds a `CLASSIFY' target, which enables the user to set
130 the priority of a packet. Some qdiscs can use this value for
131 classification, among these are:
133 atm, cbq, dsmark, pfifo_fast, htb, prio
135 To compile it as a module, choose M here. If unsure, say N.
137 config NETFILTER_XT_TARGET_CONNMARK
138 tristate '"CONNMARK" target support'
139 depends on NETFILTER_XTABLES
140 depends on IP_NF_MANGLE || IP6_NF_MANGLE
141 depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
143 This option adds a `CONNMARK' target, which allows one to manipulate
144 the connection mark value. Similar to the MARK target, but
145 affects the connection mark value rather than the packet mark value.
147 If you want to compile it as a module, say M here and read
148 <file:Documentation/modules.txt>. The module will be called
149 ipt_CONNMARK.o. If unsure, say `N'.
151 config NETFILTER_XT_TARGET_DSCP
152 tristate '"DSCP" target support'
153 depends on NETFILTER_XTABLES
154 depends on IP_NF_MANGLE || IP6_NF_MANGLE
156 This option adds a `DSCP' target, which allows you to manipulate
157 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
159 The DSCP field can have any value between 0x0 and 0x3f inclusive.
161 To compile it as a module, choose M here. If unsure, say N.
163 config NETFILTER_XT_TARGET_MARK
164 tristate '"MARK" target support'
165 depends on NETFILTER_XTABLES
167 This option adds a `MARK' target, which allows you to create rules
168 in the `mangle' table which alter the netfilter mark (nfmark) field
169 associated with the packet prior to routing. This can change
170 the routing method (see `Use netfilter MARK value as routing
171 key') and can also be used by other subsystems to change their
174 To compile it as a module, choose M here. If unsure, say N.
176 config NETFILTER_XT_TARGET_NFQUEUE
177 tristate '"NFQUEUE" target Support'
178 depends on NETFILTER_XTABLES
180 This target replaced the old obsolete QUEUE target.
182 As opposed to QUEUE, it supports 65535 different queues,
185 To compile it as a module, choose M here. If unsure, say N.
187 config NETFILTER_XT_TARGET_NOTRACK
188 tristate '"NOTRACK" target support'
189 depends on NETFILTER_XTABLES
190 depends on IP_NF_RAW || IP6_NF_RAW
191 depends on IP_NF_CONNTRACK || NF_CONNTRACK
193 The NOTRACK target allows a select rule to specify
194 which packets *not* to enter the conntrack/NAT
195 subsystem with all the consequences (no ICMP error tracking,
196 no protocol helpers for the selected packets).
198 If you want to compile it as a module, say M here and read
199 <file:Documentation/modules.txt>. If unsure, say `N'.
201 config NETFILTER_XT_TARGET_SECMARK
202 tristate '"SECMARK" target support'
203 depends on NETFILTER_XTABLES && NETWORK_SECMARK
205 The SECMARK target allows security marking of network
206 packets, for use with security subsystems.
208 To compile it as a module, choose M here. If unsure, say N.
210 config NETFILTER_XT_TARGET_CONNSECMARK
211 tristate '"CONNSECMARK" target support'
212 depends on NETFILTER_XTABLES && \
213 ((NF_CONNTRACK && NF_CONNTRACK_SECMARK) || \
214 (IP_NF_CONNTRACK && IP_NF_CONNTRACK_SECMARK))
216 The CONNSECMARK target copies security markings from packets
217 to connections, and restores security markings from connections
218 to packets (if the packets are not already marked). This would
219 normally be used in conjunction with the SECMARK target.
221 To compile it as a module, choose M here. If unsure, say N.
223 config NETFILTER_XT_MATCH_COMMENT
224 tristate '"comment" match support'
225 depends on NETFILTER_XTABLES
227 This option adds a `comment' dummy-match, which allows you to put
228 comments in your iptables ruleset.
230 If you want to compile it as a module, say M here and read
231 <file:Documentation/modules.txt>. If unsure, say `N'.
233 config NETFILTER_XT_MATCH_CONNBYTES
234 tristate '"connbytes" per-connection counter match support'
235 depends on NETFILTER_XTABLES
236 depends on (IP_NF_CONNTRACK && IP_NF_CT_ACCT) || (NF_CT_ACCT && NF_CONNTRACK)
238 This option adds a `connbytes' match, which allows you to match the
239 number of bytes and/or packets for each direction within a connection.
241 If you want to compile it as a module, say M here and read
242 <file:Documentation/modules.txt>. If unsure, say `N'.
244 config NETFILTER_XT_MATCH_CONNMARK
245 tristate '"connmark" connection mark match support'
246 depends on NETFILTER_XTABLES
247 depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
249 This option adds a `connmark' match, which allows you to match the
250 connection mark value previously set for the session by `CONNMARK'.
252 If you want to compile it as a module, say M here and read
253 <file:Documentation/modules.txt>. The module will be called
254 ipt_connmark.o. If unsure, say `N'.
256 config NETFILTER_XT_MATCH_CONNTRACK
257 tristate '"conntrack" connection tracking match support'
258 depends on NETFILTER_XTABLES
259 depends on IP_NF_CONNTRACK || NF_CONNTRACK
261 This is a general conntrack match module, a superset of the state match.
263 It allows matching on additional conntrack information, which is
264 useful in complex configurations, such as NAT gateways with multiple
265 internet links or tunnels.
267 To compile it as a module, choose M here. If unsure, say N.
269 config NETFILTER_XT_MATCH_DCCP
270 tristate '"DCCP" protocol match support'
271 depends on NETFILTER_XTABLES
273 With this option enabled, you will be able to use the iptables
274 `dccp' match in order to match on DCCP source/destination ports
277 If you want to compile it as a module, say M here and read
278 <file:Documentation/modules.txt>. If unsure, say `N'.
280 config NETFILTER_XT_MATCH_DSCP
281 tristate '"DSCP" match support'
282 depends on NETFILTER_XTABLES
284 This option adds a `DSCP' match, which allows you to match against
285 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
287 The DSCP field can have any value between 0x0 and 0x3f inclusive.
289 To compile it as a module, choose M here. If unsure, say N.
291 config NETFILTER_XT_MATCH_ESP
292 tristate '"ESP" match support'
293 depends on NETFILTER_XTABLES
295 This match extension allows you to match a range of SPIs
296 inside ESP header of IPSec packets.
298 To compile it as a module, choose M here. If unsure, say N.
300 config NETFILTER_XT_MATCH_HELPER
301 tristate '"helper" match support'
302 depends on NETFILTER_XTABLES
303 depends on IP_NF_CONNTRACK || NF_CONNTRACK
305 Helper matching allows you to match packets in dynamic connections
306 tracked by a conntrack-helper, ie. ip_conntrack_ftp
308 To compile it as a module, choose M here. If unsure, say Y.
310 config NETFILTER_XT_MATCH_LENGTH
311 tristate '"length" match support'
312 depends on NETFILTER_XTABLES
314 This option allows you to match the length of a packet against a
315 specific value or range of values.
317 To compile it as a module, choose M here. If unsure, say N.
319 config NETFILTER_XT_MATCH_LIMIT
320 tristate '"limit" match support'
321 depends on NETFILTER_XTABLES
323 limit matching allows you to control the rate at which a rule can be
324 matched: mainly useful in combination with the LOG target ("LOG
325 target support", below) and to avoid some Denial of Service attacks.
327 To compile it as a module, choose M here. If unsure, say N.
329 config NETFILTER_XT_MATCH_MAC
330 tristate '"mac" address match support'
331 depends on NETFILTER_XTABLES
333 MAC matching allows you to match packets based on the source
334 Ethernet address of the packet.
336 To compile it as a module, choose M here. If unsure, say N.
338 config NETFILTER_XT_MATCH_MARK
339 tristate '"mark" match support'
340 depends on NETFILTER_XTABLES
342 Netfilter mark matching allows you to match packets based on the
343 `nfmark' value in the packet. This can be set by the MARK target
346 To compile it as a module, choose M here. If unsure, say N.
348 config NETFILTER_XT_MATCH_POLICY
349 tristate 'IPsec "policy" match support'
350 depends on NETFILTER_XTABLES && XFRM
352 Policy matching allows you to match packets based on the
353 IPsec policy that was used during decapsulation/will
354 be used during encapsulation.
356 To compile it as a module, choose M here. If unsure, say N.
358 config NETFILTER_XT_MATCH_MULTIPORT
359 tristate "Multiple port match support"
360 depends on NETFILTER_XTABLES
362 Multiport matching allows you to match TCP or UDP packets based on
363 a series of source or destination ports: normally a rule can only
364 match a single range of ports.
366 To compile it as a module, choose M here. If unsure, say N.
368 config NETFILTER_XT_MATCH_PHYSDEV
369 tristate '"physdev" match support'
370 depends on NETFILTER_XTABLES && BRIDGE && BRIDGE_NETFILTER
372 Physdev packet matching matches against the physical bridge ports
373 the IP packet arrived on or will leave by.
375 To compile it as a module, choose M here. If unsure, say N.
377 config NETFILTER_XT_MATCH_PKTTYPE
378 tristate '"pkttype" packet type match support'
379 depends on NETFILTER_XTABLES
381 Packet type matching allows you to match a packet by
382 its "class", eg. BROADCAST, MULTICAST, ...
385 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
387 To compile it as a module, choose M here. If unsure, say N.
389 config NETFILTER_XT_MATCH_QUOTA
390 tristate '"quota" match support'
391 depends on NETFILTER_XTABLES
393 This option adds a `quota' match, which allows to match on a
396 If you want to compile it as a module, say M here and read
397 <file:Documentation/modules.txt>. If unsure, say `N'.
399 config NETFILTER_XT_MATCH_REALM
400 tristate '"realm" match support'
401 depends on NETFILTER_XTABLES
404 This option adds a `realm' match, which allows you to use the realm
405 key from the routing subsystem inside iptables.
407 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
410 If you want to compile it as a module, say M here and read
411 <file:Documentation/modules.txt>. If unsure, say `N'.
413 config NETFILTER_XT_MATCH_SCTP
414 tristate '"sctp" protocol match support (EXPERIMENTAL)'
415 depends on NETFILTER_XTABLES && EXPERIMENTAL
417 With this option enabled, you will be able to use the
418 `sctp' match in order to match on SCTP source/destination ports
419 and SCTP chunk types.
421 If you want to compile it as a module, say M here and read
422 <file:Documentation/modules.txt>. If unsure, say `N'.
424 config NETFILTER_XT_MATCH_STATE
425 tristate '"state" match support'
426 depends on NETFILTER_XTABLES
427 depends on IP_NF_CONNTRACK || NF_CONNTRACK
429 Connection state matching allows you to match packets based on their
430 relationship to a tracked connection (ie. previous packets). This
431 is a powerful tool for packet classification.
433 To compile it as a module, choose M here. If unsure, say N.
435 config NETFILTER_XT_MATCH_STATISTIC
436 tristate '"statistic" match support'
437 depends on NETFILTER_XTABLES
439 This option adds a `statistic' match, which allows you to match
440 on packets periodically or randomly with a given percentage.
442 To compile it as a module, choose M here. If unsure, say N.
444 config NETFILTER_XT_MATCH_STRING
445 tristate '"string" match support'
446 depends on NETFILTER_XTABLES
448 select TEXTSEARCH_KMP
450 select TEXTSEARCH_FSM
452 This option adds a `string' match, which allows you to look for
453 pattern matchings in packets.
455 To compile it as a module, choose M here. If unsure, say N.
457 config NETFILTER_XT_MATCH_TCPMSS
458 tristate '"tcpmss" match support'
459 depends on NETFILTER_XTABLES
461 This option adds a `tcpmss' match, which allows you to examine the
462 MSS value of TCP SYN packets, which control the maximum packet size
465 To compile it as a module, choose M here. If unsure, say N.