Update broken web addresses in the kernel.
[deliverable/linux.git] / net / ipv4 / netfilter / Kconfig
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1#
2# IP netfilter configuration
3#
4
5menu "IP: Netfilter Configuration"
6 depends on INET && NETFILTER
7
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8config NF_DEFRAG_IPV4
9 tristate
10 default n
11
9fb9cbb1 12config NF_CONNTRACK_IPV4
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13 tristate "IPv4 connection tracking support (required for NAT)"
14 depends on NF_CONNTRACK
33b8e776 15 default m if NETFILTER_ADVANCED=n
73e4022f 16 select NF_DEFRAG_IPV4
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17 ---help---
18 Connection tracking keeps a record of what packets have passed
19 through your machine, in order to figure out how they are related
20 into connections.
21
22 This is IPv4 support on Layer 3 independent connection tracking.
23 Layer 3 independent connection tracking is experimental scheme
24 which generalize ip_conntrack to support other layer 3 protocols.
25
26 To compile it as a module, choose M here. If unsure, say N.
27
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28config NF_CONNTRACK_PROC_COMPAT
29 bool "proc/sysctl compatibility with old connection tracking"
0c4ca1bd 30 depends on NF_CONNTRACK_IPV4
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31 default y
32 help
33 This option enables /proc and sysctl compatibility with the old
67c0d579 34 layer 3 dependent connection tracking. This is needed to keep
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35 old programs that have not been adapted to the new names working.
36
37 If unsure, say Y.
38
1da177e4 39config IP_NF_QUEUE
7af4cc3f 40 tristate "IP Userspace queueing via NETLINK (OBSOLETE)"
33b8e776 41 depends on NETFILTER_ADVANCED
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42 help
43 Netfilter has the ability to queue packets to user space: the
44 netlink device can be used to access them using this driver.
45
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46 This option enables the old IPv4-only "ip_queue" implementation
47 which has been obsoleted by the new "nfnetlink_queue" code (see
48 CONFIG_NETFILTER_NETLINK_QUEUE).
49
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50 To compile it as a module, choose M here. If unsure, say N.
51
52config IP_NF_IPTABLES
53 tristate "IP tables support (required for filtering/masq/NAT)"
33b8e776 54 default m if NETFILTER_ADVANCED=n
a3c941b0 55 select NETFILTER_XTABLES
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56 help
57 iptables is a general, extensible packet identification framework.
58 The packet filtering and full NAT (masquerading, port forwarding,
59 etc) subsystems now use this: say `Y' or `M' here if you want to use
60 either of those.
61
62 To compile it as a module, choose M here. If unsure, say N.
63
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64if IP_NF_IPTABLES
65
1da177e4 66# The matches.
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67config IP_NF_MATCH_ADDRTYPE
68 tristate '"addrtype" address type match support'
33b8e776 69 depends on NETFILTER_ADVANCED
1da177e4 70 help
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71 This option allows you to match what routing thinks of an address,
72 eg. UNICAST, LOCAL, BROADCAST, ...
1da177e4 73
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74 If you want to compile it as a module, say M here and read
75 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1da177e4 76
dc5ab2fa 77config IP_NF_MATCH_AH
4c37799c 78 tristate '"ah" match support'
33b8e776 79 depends on NETFILTER_ADVANCED
1da177e4 80 help
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81 This match extension allows you to match a range of SPIs
82 inside AH header of IPSec packets.
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83
84 To compile it as a module, choose M here. If unsure, say N.
85
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86config IP_NF_MATCH_ECN
87 tristate '"ecn" match support'
33b8e776 88 depends on NETFILTER_ADVANCED
1da177e4 89 help
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90 This option adds a `ECN' match, which allows you to match against
91 the IPv4 and TCP header ECN fields.
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92
93 To compile it as a module, choose M here. If unsure, say N.
94
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95config IP_NF_MATCH_TTL
96 tristate '"ttl" match support'
97 depends on NETFILTER_ADVANCED
98 select NETFILTER_XT_MATCH_HL
99 ---help---
100 This is a backwards-compat option for the user's convenience
101 (e.g. when running oldconfig). It selects
67c0d579 102 CONFIG_NETFILTER_XT_MATCH_HL.
4323362e 103
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104# `filter', generic and specific targets
105config IP_NF_FILTER
106 tristate "Packet filtering"
33b8e776 107 default m if NETFILTER_ADVANCED=n
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108 help
109 Packet filtering defines a table `filter', which has a series of
110 rules for simple packet filtering at local input, forwarding and
111 local output. See the man page for iptables(8).
112
113 To compile it as a module, choose M here. If unsure, say N.
114
115config IP_NF_TARGET_REJECT
116 tristate "REJECT target support"
117 depends on IP_NF_FILTER
33b8e776 118 default m if NETFILTER_ADVANCED=n
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119 help
120 The REJECT target allows a filtering rule to specify that an ICMP
121 error should be issued in response to an incoming packet, rather
122 than silently being dropped.
123
124 To compile it as a module, choose M here. If unsure, say N.
125
126config IP_NF_TARGET_LOG
127 tristate "LOG target support"
33b8e776 128 default m if NETFILTER_ADVANCED=n
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129 help
130 This option adds a `LOG' target, which allows you to create rules in
131 any iptables table which records the packet header to the syslog.
132
133 To compile it as a module, choose M here. If unsure, say N.
134
135config IP_NF_TARGET_ULOG
44adf28f 136 tristate "ULOG target support"
33b8e776 137 default m if NETFILTER_ADVANCED=n
1da177e4 138 ---help---
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139
140 This option enables the old IPv4-only "ipt_ULOG" implementation
141 which has been obsoleted by the new "nfnetlink_log" code (see
142 CONFIG_NETFILTER_NETLINK_LOG).
143
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144 This option adds a `ULOG' target, which allows you to create rules in
145 any iptables table. The packet is passed to a userspace logging
146 daemon using netlink multicast sockets; unlike the LOG target
147 which can only be viewed through syslog.
148
44c09201 149 The appropriate userspace logging daemon (ulogd) may be obtained from
631dd1a8 150 <http://www.netfilter.org/projects/ulogd/index.html>
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151
152 To compile it as a module, choose M here. If unsure, say N.
153
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154# NAT + specific targets: nf_conntrack
155config NF_NAT
156 tristate "Full NAT"
c2df73de 157 depends on NF_CONNTRACK_IPV4
33b8e776 158 default m if NETFILTER_ADVANCED=n
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159 help
160 The Full NAT option allows masquerading, port forwarding and other
161 forms of full Network Address Port Translation. It is controlled by
162 the `nat' table in iptables: see the man page for iptables(8).
163
164 To compile it as a module, choose M here. If unsure, say N.
165
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166config NF_NAT_NEEDED
167 bool
168 depends on NF_NAT
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169 default y
170
171config IP_NF_TARGET_MASQUERADE
172 tristate "MASQUERADE target support"
587aa641 173 depends on NF_NAT
33b8e776 174 default m if NETFILTER_ADVANCED=n
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175 help
176 Masquerading is a special case of NAT: all outgoing connections are
177 changed to seem to come from a particular interface's address, and
178 if the interface goes down, those connections are lost. This is
179 only useful for dialup accounts with dynamic IP address (ie. your IP
180 address will be different on next dialup).
181
182 To compile it as a module, choose M here. If unsure, say N.
183
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184config IP_NF_TARGET_NETMAP
185 tristate "NETMAP target support"
587aa641 186 depends on NF_NAT
33b8e776 187 depends on NETFILTER_ADVANCED
1da177e4 188 help
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189 NETMAP is an implementation of static 1:1 NAT mapping of network
190 addresses. It maps the network address part, while keeping the host
191 address part intact.
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192
193 To compile it as a module, choose M here. If unsure, say N.
194
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195config IP_NF_TARGET_REDIRECT
196 tristate "REDIRECT target support"
587aa641 197 depends on NF_NAT
33b8e776 198 depends on NETFILTER_ADVANCED
1da177e4 199 help
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200 REDIRECT is a special case of NAT: all incoming connections are
201 mapped onto the incoming interface's address, causing the packets to
202 come to the local machine instead of passing through. This is
203 useful for transparent proxies.
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204
205 To compile it as a module, choose M here. If unsure, say N.
206
807467c2 207config NF_NAT_SNMP_BASIC
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208 tristate "Basic SNMP-ALG support"
209 depends on NF_NAT
33b8e776 210 depends on NETFILTER_ADVANCED
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211 ---help---
212
213 This module implements an Application Layer Gateway (ALG) for
214 SNMP payloads. In conjunction with NAT, it allows a network
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215 management system to access multiple private networks with
216 conflicting addresses. It works by modifying IP addresses
217 inside SNMP payloads to match IP-layer NAT mapping.
218
219 This is the "basic" form of SNMP-ALG, as described in RFC 2962
220
221 To compile it as a module, choose M here. If unsure, say N.
222
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223# If they want FTP, set to $CONFIG_IP_NF_NAT (m or y),
224# or $CONFIG_IP_NF_FTP (m or y), whichever is weaker.
225# From kconfig-language.txt:
226#
227# <expr> '&&' <expr> (6)
228#
229# (6) Returns the result of min(/expr/, /expr/).
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230config NF_NAT_PROTO_DCCP
231 tristate
232 depends on NF_NAT && NF_CT_PROTO_DCCP
233 default NF_NAT && NF_CT_PROTO_DCCP
234
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235config NF_NAT_PROTO_GRE
236 tristate
237 depends on NF_NAT && NF_CT_PROTO_GRE
238
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239config NF_NAT_PROTO_UDPLITE
240 tristate
241 depends on NF_NAT && NF_CT_PROTO_UDPLITE
242 default NF_NAT && NF_CT_PROTO_UDPLITE
243
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244config NF_NAT_PROTO_SCTP
245 tristate
246 default NF_NAT && NF_CT_PROTO_SCTP
247 depends on NF_NAT && NF_CT_PROTO_SCTP
4e9d8a70 248 select LIBCRC32C
9d908a69 249
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250config NF_NAT_FTP
251 tristate
c2df73de 252 depends on NF_CONNTRACK && NF_NAT
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253 default NF_NAT && NF_CONNTRACK_FTP
254
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255config NF_NAT_IRC
256 tristate
c2df73de 257 depends on NF_CONNTRACK && NF_NAT
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258 default NF_NAT && NF_CONNTRACK_IRC
259
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260config NF_NAT_TFTP
261 tristate
c2df73de 262 depends on NF_CONNTRACK && NF_NAT
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263 default NF_NAT && NF_CONNTRACK_TFTP
264
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265config NF_NAT_AMANDA
266 tristate
c2df73de 267 depends on NF_CONNTRACK && NF_NAT
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268 default NF_NAT && NF_CONNTRACK_AMANDA
269
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270config NF_NAT_PPTP
271 tristate
c2df73de 272 depends on NF_CONNTRACK && NF_NAT
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273 default NF_NAT && NF_CONNTRACK_PPTP
274 select NF_NAT_PROTO_GRE
275
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276config NF_NAT_H323
277 tristate
c2df73de 278 depends on NF_CONNTRACK && NF_NAT
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279 default NF_NAT && NF_CONNTRACK_H323
280
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281config NF_NAT_SIP
282 tristate
c2df73de 283 depends on NF_CONNTRACK && NF_NAT
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284 default NF_NAT && NF_CONNTRACK_SIP
285
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286# mangle + specific targets
287config IP_NF_MANGLE
288 tristate "Packet mangling"
33b8e776 289 default m if NETFILTER_ADVANCED=n
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290 help
291 This option adds a `mangle' table to iptables: see the man page for
292 iptables(8). This table is used for various packet alterations
293 which can effect how the packet is routed.
294
295 To compile it as a module, choose M here. If unsure, say N.
296
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297config IP_NF_TARGET_CLUSTERIP
298 tristate "CLUSTERIP target support (EXPERIMENTAL)"
299 depends on IP_NF_MANGLE && EXPERIMENTAL
300 depends on NF_CONNTRACK_IPV4
301 depends on NETFILTER_ADVANCED
302 select NF_CONNTRACK_MARK
303 help
304 The CLUSTERIP target allows you to build load-balancing clusters of
305 network servers without having a dedicated load-balancing
306 router/server/switch.
307
308 To compile it as a module, choose M here. If unsure, say N.
309
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310config IP_NF_TARGET_ECN
311 tristate "ECN target support"
312 depends on IP_NF_MANGLE
33b8e776 313 depends on NETFILTER_ADVANCED
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314 ---help---
315 This option adds a `ECN' target, which can be used in the iptables mangle
316 table.
317
318 You can use this target to remove the ECN bits from the IPv4 header of
319 an IP packet. This is particularly useful, if you need to work around
320 existing ECN blackholes on the internet, but don't want to disable
321 ECN support in general.
322
323 To compile it as a module, choose M here. If unsure, say N.
324
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325config IP_NF_TARGET_TTL
326 tristate '"TTL" target support'
327 depends on NETFILTER_ADVANCED
328 select NETFILTER_XT_TARGET_HL
329 ---help---
330 This is a backwards-compat option for the user's convenience
331 (e.g. when running oldconfig). It selects
67c0d579 332 CONFIG_NETFILTER_XT_TARGET_HL.
4323362e 333
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334# raw + specific targets
335config IP_NF_RAW
336 tristate 'raw table support (required for NOTRACK/TRACE)'
33b8e776 337 depends on NETFILTER_ADVANCED
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338 help
339 This option adds a `raw' table to iptables. This table is the very
340 first in the netfilter framework and hooks in at the PREROUTING
341 and OUTPUT chains.
342
343 If you want to compile it as a module, say M here and read
e403149c 344 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
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345
346# security table for MAC policy
347config IP_NF_SECURITY
348 tristate "Security table"
560ee653 349 depends on SECURITY
70eed75d 350 depends on NETFILTER_ADVANCED
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351 help
352 This option adds a `security' table to iptables, for use
353 with Mandatory Access Control (MAC) policy.
354
355 If unsure, say N.
1da177e4 356
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357endif # IP_NF_IPTABLES
358
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359# ARP tables
360config IP_NF_ARPTABLES
361 tristate "ARP tables support"
a3c941b0 362 select NETFILTER_XTABLES
33b8e776 363 depends on NETFILTER_ADVANCED
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364 help
365 arptables is a general, extensible packet identification framework.
366 The ARP packet filtering and mangling (manipulation)subsystems
367 use this: say Y or M here if you want to use either of those.
368
369 To compile it as a module, choose M here. If unsure, say N.
370
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371if IP_NF_ARPTABLES
372
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373config IP_NF_ARPFILTER
374 tristate "ARP packet filtering"
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375 help
376 ARP packet filtering defines a table `filter', which has a series of
377 rules for simple ARP packet filtering at local input and
378 local output. On a bridge, you can also specify filtering rules
379 for forwarded ARP packets. See the man page for arptables(8).
380
381 To compile it as a module, choose M here. If unsure, say N.
382
383config IP_NF_ARP_MANGLE
384 tristate "ARP payload mangling"
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385 help
386 Allows altering the ARP packet payload: source and destination
387 hardware and network addresses.
388
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389endif # IP_NF_ARPTABLES
390
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391endmenu
392
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