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_MARK
152 tristate '"MARK" target support'
153 depends on NETFILTER_XTABLES
155 This option adds a `MARK' target, which allows you to create rules
156 in the `mangle' table which alter the netfilter mark (nfmark) field
157 associated with the packet prior to routing. This can change
158 the routing method (see `Use netfilter MARK value as routing
159 key') and can also be used by other subsystems to change their
162 To compile it as a module, choose M here. If unsure, say N.
164 config NETFILTER_XT_TARGET_NFQUEUE
165 tristate '"NFQUEUE" target Support'
166 depends on NETFILTER_XTABLES
168 This target replaced the old obsolete QUEUE target.
170 As opposed to QUEUE, it supports 65535 different queues,
173 To compile it as a module, choose M here. If unsure, say N.
175 config NETFILTER_XT_TARGET_NOTRACK
176 tristate '"NOTRACK" target support'
177 depends on NETFILTER_XTABLES
178 depends on IP_NF_RAW || IP6_NF_RAW
179 depends on IP_NF_CONNTRACK || NF_CONNTRACK
181 The NOTRACK target allows a select rule to specify
182 which packets *not* to enter the conntrack/NAT
183 subsystem with all the consequences (no ICMP error tracking,
184 no protocol helpers for the selected packets).
186 If you want to compile it as a module, say M here and read
187 <file:Documentation/modules.txt>. If unsure, say `N'.
189 config NETFILTER_XT_TARGET_SECMARK
190 tristate '"SECMARK" target support'
191 depends on NETFILTER_XTABLES && NETWORK_SECMARK
193 The SECMARK target allows security marking of network
194 packets, for use with security subsystems.
196 To compile it as a module, choose M here. If unsure, say N.
198 config NETFILTER_XT_TARGET_CONNSECMARK
199 tristate '"CONNSECMARK" target support'
200 depends on NETFILTER_XTABLES && (NF_CONNTRACK_SECMARK || IP_NF_CONNTRACK_SECMARK)
202 The CONNSECMARK target copies security markings from packets
203 to connections, and restores security markings from connections
204 to packets (if the packets are not already marked). This would
205 normally be used in conjunction with the SECMARK target.
207 To compile it as a module, choose M here. If unsure, say N.
209 config NETFILTER_XT_MATCH_COMMENT
210 tristate '"comment" match support'
211 depends on NETFILTER_XTABLES
213 This option adds a `comment' dummy-match, which allows you to put
214 comments in your iptables ruleset.
216 If you want to compile it as a module, say M here and read
217 <file:Documentation/modules.txt>. If unsure, say `N'.
219 config NETFILTER_XT_MATCH_CONNBYTES
220 tristate '"connbytes" per-connection counter match support'
221 depends on NETFILTER_XTABLES
222 depends on (IP_NF_CONNTRACK && IP_NF_CT_ACCT) || (NF_CT_ACCT && NF_CONNTRACK)
224 This option adds a `connbytes' match, which allows you to match the
225 number of bytes and/or packets for each direction within a connection.
227 If you want to compile it as a module, say M here and read
228 <file:Documentation/modules.txt>. If unsure, say `N'.
230 config NETFILTER_XT_MATCH_CONNMARK
231 tristate '"connmark" connection mark match support'
232 depends on NETFILTER_XTABLES
233 depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
235 This option adds a `connmark' match, which allows you to match the
236 connection mark value previously set for the session by `CONNMARK'.
238 If you want to compile it as a module, say M here and read
239 <file:Documentation/modules.txt>. The module will be called
240 ipt_connmark.o. If unsure, say `N'.
242 config NETFILTER_XT_MATCH_CONNTRACK
243 tristate '"conntrack" connection tracking match support'
244 depends on NETFILTER_XTABLES
245 depends on IP_NF_CONNTRACK || NF_CONNTRACK
247 This is a general conntrack match module, a superset of the state match.
249 It allows matching on additional conntrack information, which is
250 useful in complex configurations, such as NAT gateways with multiple
251 internet links or tunnels.
253 To compile it as a module, choose M here. If unsure, say N.
255 config NETFILTER_XT_MATCH_DCCP
256 tristate '"DCCP" protocol match support'
257 depends on NETFILTER_XTABLES
259 With this option enabled, you will be able to use the iptables
260 `dccp' match in order to match on DCCP source/destination ports
263 If you want to compile it as a module, say M here and read
264 <file:Documentation/modules.txt>. If unsure, say `N'.
266 config NETFILTER_XT_MATCH_ESP
267 tristate '"ESP" match support'
268 depends on NETFILTER_XTABLES
270 This match extension allows you to match a range of SPIs
271 inside ESP header of IPSec packets.
273 To compile it as a module, choose M here. If unsure, say N.
275 config NETFILTER_XT_MATCH_HELPER
276 tristate '"helper" match support'
277 depends on NETFILTER_XTABLES
278 depends on IP_NF_CONNTRACK || NF_CONNTRACK
280 Helper matching allows you to match packets in dynamic connections
281 tracked by a conntrack-helper, ie. ip_conntrack_ftp
283 To compile it as a module, choose M here. If unsure, say Y.
285 config NETFILTER_XT_MATCH_LENGTH
286 tristate '"length" match support'
287 depends on NETFILTER_XTABLES
289 This option allows you to match the length of a packet against a
290 specific value or range of values.
292 To compile it as a module, choose M here. If unsure, say N.
294 config NETFILTER_XT_MATCH_LIMIT
295 tristate '"limit" match support'
296 depends on NETFILTER_XTABLES
298 limit matching allows you to control the rate at which a rule can be
299 matched: mainly useful in combination with the LOG target ("LOG
300 target support", below) and to avoid some Denial of Service attacks.
302 To compile it as a module, choose M here. If unsure, say N.
304 config NETFILTER_XT_MATCH_MAC
305 tristate '"mac" address match support'
306 depends on NETFILTER_XTABLES
308 MAC matching allows you to match packets based on the source
309 Ethernet address of the packet.
311 To compile it as a module, choose M here. If unsure, say N.
313 config NETFILTER_XT_MATCH_MARK
314 tristate '"mark" match support'
315 depends on NETFILTER_XTABLES
317 Netfilter mark matching allows you to match packets based on the
318 `nfmark' value in the packet. This can be set by the MARK target
321 To compile it as a module, choose M here. If unsure, say N.
323 config NETFILTER_XT_MATCH_POLICY
324 tristate 'IPsec "policy" match support'
325 depends on NETFILTER_XTABLES && XFRM
327 Policy matching allows you to match packets based on the
328 IPsec policy that was used during decapsulation/will
329 be used during encapsulation.
331 To compile it as a module, choose M here. If unsure, say N.
333 config NETFILTER_XT_MATCH_MULTIPORT
334 tristate "Multiple port match support"
335 depends on NETFILTER_XTABLES
337 Multiport matching allows you to match TCP or UDP packets based on
338 a series of source or destination ports: normally a rule can only
339 match a single range of ports.
341 To compile it as a module, choose M here. If unsure, say N.
343 config NETFILTER_XT_MATCH_PHYSDEV
344 tristate '"physdev" match support'
345 depends on NETFILTER_XTABLES && BRIDGE_NETFILTER
347 Physdev packet matching matches against the physical bridge ports
348 the IP packet arrived on or will leave by.
350 To compile it as a module, choose M here. If unsure, say N.
352 config NETFILTER_XT_MATCH_PKTTYPE
353 tristate '"pkttype" packet type match support'
354 depends on NETFILTER_XTABLES
356 Packet type matching allows you to match a packet by
357 its "class", eg. BROADCAST, MULTICAST, ...
360 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
362 To compile it as a module, choose M here. If unsure, say N.
364 config NETFILTER_XT_MATCH_QUOTA
365 tristate '"quota" match support'
366 depends on NETFILTER_XTABLES
368 This option adds a `quota' match, which allows to match on a
371 If you want to compile it as a module, say M here and read
372 <file:Documentation/modules.txt>. If unsure, say `N'.
374 config NETFILTER_XT_MATCH_REALM
375 tristate '"realm" match support'
376 depends on NETFILTER_XTABLES
379 This option adds a `realm' match, which allows you to use the realm
380 key from the routing subsystem inside iptables.
382 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
385 If you want to compile it as a module, say M here and read
386 <file:Documentation/modules.txt>. If unsure, say `N'.
388 config NETFILTER_XT_MATCH_SCTP
389 tristate '"sctp" protocol match support (EXPERIMENTAL)'
390 depends on NETFILTER_XTABLES && EXPERIMENTAL
392 With this option enabled, you will be able to use the
393 `sctp' match in order to match on SCTP source/destination ports
394 and SCTP chunk types.
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_STATE
400 tristate '"state" match support'
401 depends on NETFILTER_XTABLES
402 depends on IP_NF_CONNTRACK || NF_CONNTRACK
404 Connection state matching allows you to match packets based on their
405 relationship to a tracked connection (ie. previous packets). This
406 is a powerful tool for packet classification.
408 To compile it as a module, choose M here. If unsure, say N.
410 config NETFILTER_XT_MATCH_STATISTIC
411 tristate '"statistic" match support'
412 depends on NETFILTER_XTABLES
414 This option adds a `statistic' match, which allows you to match
415 on packets periodically or randomly with a given percentage.
417 To compile it as a module, choose M here. If unsure, say N.
419 config NETFILTER_XT_MATCH_STRING
420 tristate '"string" match support'
421 depends on NETFILTER_XTABLES
423 select TEXTSEARCH_KMP
425 select TEXTSEARCH_FSM
427 This option adds a `string' match, which allows you to look for
428 pattern matchings in packets.
430 To compile it as a module, choose M here. If unsure, say N.
432 config NETFILTER_XT_MATCH_TCPMSS
433 tristate '"tcpmss" match support'
434 depends on NETFILTER_XTABLES
436 This option adds a `tcpmss' match, which allows you to examine the
437 MSS value of TCP SYN packets, which control the maximum packet size
440 To compile it as a module, choose M here. If unsure, say N.