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linux
1#
2# IP netfilter configuration
3#
4
5menu "IP: Netfilter Configuration"
6 depends on INET && NETFILTER
7
8config NF_DEFRAG_IPV4
9 tristate
10 default n
11
12config NF_CONNTRACK_IPV4
13 tristate "IPv4 connection tracking support (required for NAT)"
14 depends on NF_CONNTRACK
15 default m if NETFILTER_ADVANCED=n
16 select NF_DEFRAG_IPV4
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
28config NF_SOCKET_IPV4
29 tristate "IPv4 socket lookup support"
30 help
31 This option enables the IPv4 socket lookup infrastructure. This is
32 is required by the {ip,nf}tables socket match.
33
34config NF_TPROXY_IPV4
35 tristate "IPv4 tproxy support"
36
37if NF_TABLES
38
39config NF_TABLES_IPV4
40 bool "IPv4 nf_tables support"
41 help
42 This option enables the IPv4 support for nf_tables.
43
44if NF_TABLES_IPV4
45
46config NFT_CHAIN_ROUTE_IPV4
47 tristate "IPv4 nf_tables route chain support"
48 help
49 This option enables the "route" chain for IPv4 in nf_tables. This
50 chain type is used to force packet re-routing after mangling header
51 fields such as the source, destination, type of service and
52 the packet mark.
53
54config NFT_REJECT_IPV4
55 select NF_REJECT_IPV4
56 default NFT_REJECT
57 tristate
58
59config NFT_DUP_IPV4
60 tristate "IPv4 nf_tables packet duplication support"
61 depends on !NF_CONNTRACK || NF_CONNTRACK
62 select NF_DUP_IPV4
63 help
64 This module enables IPv4 packet duplication support for nf_tables.
65
66config NFT_FIB_IPV4
67 select NFT_FIB
68 tristate "nf_tables fib / ip route lookup support"
69 help
70 This module enables IPv4 FIB lookups, e.g. for reverse path filtering.
71 It also allows query of the FIB for the route type, e.g. local, unicast,
72 multicast or blackhole.
73
74endif # NF_TABLES_IPV4
75
76config NF_TABLES_ARP
77 bool "ARP nf_tables support"
78 select NETFILTER_FAMILY_ARP
79 help
80 This option enables the ARP support for nf_tables.
81
82endif # NF_TABLES
83
84config NF_FLOW_TABLE_IPV4
85 tristate "Netfilter flow table IPv4 module"
86 depends on NF_FLOW_TABLE
87 help
88 This option adds the flow table IPv4 support.
89
90 To compile it as a module, choose M here.
91
92config NF_DUP_IPV4
93 tristate "Netfilter IPv4 packet duplication to alternate destination"
94 depends on !NF_CONNTRACK || NF_CONNTRACK
95 help
96 This option enables the nf_dup_ipv4 core, which duplicates an IPv4
97 packet to be rerouted to another destination.
98
99config NF_LOG_ARP
100 tristate "ARP packet logging"
101 default m if NETFILTER_ADVANCED=n
102 select NF_LOG_COMMON
103
104config NF_LOG_IPV4
105 tristate "IPv4 packet logging"
106 default m if NETFILTER_ADVANCED=n
107 select NF_LOG_COMMON
108
109config NF_REJECT_IPV4
110 tristate "IPv4 packet rejection"
111 default m if NETFILTER_ADVANCED=n
112
113config NF_NAT_IPV4
114 tristate "IPv4 NAT"
115 depends on NF_CONNTRACK_IPV4
116 default m if NETFILTER_ADVANCED=n
117 select NF_NAT
118 help
119 The IPv4 NAT option allows masquerading, port forwarding and other
120 forms of full Network Address Port Translation. This can be
121 controlled by iptables or nft.
122
123if NF_NAT_IPV4
124
125config NFT_CHAIN_NAT_IPV4
126 depends on NF_TABLES_IPV4
127 tristate "IPv4 nf_tables nat chain support"
128 help
129 This option enables the "nat" chain for IPv4 in nf_tables. This
130 chain type is used to perform Network Address Translation (NAT)
131 packet transformations such as the source, destination address and
132 source and destination ports.
133
134config NF_NAT_MASQUERADE_IPV4
135 bool
136
137config NFT_MASQ_IPV4
138 tristate "IPv4 masquerading support for nf_tables"
139 depends on NF_TABLES_IPV4
140 depends on NFT_MASQ
141 select NF_NAT_MASQUERADE_IPV4
142 help
143 This is the expression that provides IPv4 masquerading support for
144 nf_tables.
145
146config NFT_REDIR_IPV4
147 tristate "IPv4 redirect support for nf_tables"
148 depends on NF_TABLES_IPV4
149 depends on NFT_REDIR
150 select NF_NAT_REDIRECT
151 help
152 This is the expression that provides IPv4 redirect support for
153 nf_tables.
154
155config NF_NAT_SNMP_BASIC
156 tristate "Basic SNMP-ALG support"
157 depends on NF_CONNTRACK_SNMP
158 depends on NETFILTER_ADVANCED
159 default NF_NAT && NF_CONNTRACK_SNMP
160 select ASN1
161 ---help---
162
163 This module implements an Application Layer Gateway (ALG) for
164 SNMP payloads. In conjunction with NAT, it allows a network
165 management system to access multiple private networks with
166 conflicting addresses. It works by modifying IP addresses
167 inside SNMP payloads to match IP-layer NAT mapping.
168
169 This is the "basic" form of SNMP-ALG, as described in RFC 2962
170
171 To compile it as a module, choose M here. If unsure, say N.
172
173config NF_NAT_PROTO_GRE
174 tristate
175 depends on NF_CT_PROTO_GRE
176
177config NF_NAT_PPTP
178 tristate
179 depends on NF_CONNTRACK
180 default NF_CONNTRACK_PPTP
181 select NF_NAT_PROTO_GRE
182
183config NF_NAT_H323
184 tristate
185 depends on NF_CONNTRACK
186 default NF_CONNTRACK_H323
187
188endif # NF_NAT_IPV4
189
190config IP_NF_IPTABLES
191 tristate "IP tables support (required for filtering/masq/NAT)"
192 default m if NETFILTER_ADVANCED=n
193 select NETFILTER_XTABLES
194 help
195 iptables is a general, extensible packet identification framework.
196 The packet filtering and full NAT (masquerading, port forwarding,
197 etc) subsystems now use this: say `Y' or `M' here if you want to use
198 either of those.
199
200 To compile it as a module, choose M here. If unsure, say N.
201
202if IP_NF_IPTABLES
203
204# The matches.
205config IP_NF_MATCH_AH
206 tristate '"ah" match support'
207 depends on NETFILTER_ADVANCED
208 help
209 This match extension allows you to match a range of SPIs
210 inside AH header of IPSec packets.
211
212 To compile it as a module, choose M here. If unsure, say N.
213
214config IP_NF_MATCH_ECN
215 tristate '"ecn" match support'
216 depends on NETFILTER_ADVANCED
217 select NETFILTER_XT_MATCH_ECN
218 ---help---
219 This is a backwards-compat option for the user's convenience
220 (e.g. when running oldconfig). It selects
221 CONFIG_NETFILTER_XT_MATCH_ECN.
222
223config IP_NF_MATCH_RPFILTER
224 tristate '"rpfilter" reverse path filter match support'
225 depends on NETFILTER_ADVANCED
226 depends on IP_NF_MANGLE || IP_NF_RAW
227 ---help---
228 This option allows you to match packets whose replies would
229 go out via the interface the packet came in.
230
231 To compile it as a module, choose M here. If unsure, say N.
232 The module will be called ipt_rpfilter.
233
234config IP_NF_MATCH_TTL
235 tristate '"ttl" match support'
236 depends on NETFILTER_ADVANCED
237 select NETFILTER_XT_MATCH_HL
238 ---help---
239 This is a backwards-compat option for the user's convenience
240 (e.g. when running oldconfig). It selects
241 CONFIG_NETFILTER_XT_MATCH_HL.
242
243# `filter', generic and specific targets
244config IP_NF_FILTER
245 tristate "Packet filtering"
246 default m if NETFILTER_ADVANCED=n
247 help
248 Packet filtering defines a table `filter', which has a series of
249 rules for simple packet filtering at local input, forwarding and
250 local output. See the man page for iptables(8).
251
252 To compile it as a module, choose M here. If unsure, say N.
253
254config IP_NF_TARGET_REJECT
255 tristate "REJECT target support"
256 depends on IP_NF_FILTER
257 select NF_REJECT_IPV4
258 default m if NETFILTER_ADVANCED=n
259 help
260 The REJECT target allows a filtering rule to specify that an ICMP
261 error should be issued in response to an incoming packet, rather
262 than silently being dropped.
263
264 To compile it as a module, choose M here. If unsure, say N.
265
266config IP_NF_TARGET_SYNPROXY
267 tristate "SYNPROXY target support"
268 depends on NF_CONNTRACK && NETFILTER_ADVANCED
269 select NETFILTER_SYNPROXY
270 select SYN_COOKIES
271 help
272 The SYNPROXY target allows you to intercept TCP connections and
273 establish them using syncookies before they are passed on to the
274 server. This allows to avoid conntrack and server resource usage
275 during SYN-flood attacks.
276
277 To compile it as a module, choose M here. If unsure, say N.
278
279# NAT + specific targets: nf_conntrack
280config IP_NF_NAT
281 tristate "iptables NAT support"
282 depends on NF_CONNTRACK_IPV4
283 default m if NETFILTER_ADVANCED=n
284 select NF_NAT
285 select NF_NAT_IPV4
286 select NETFILTER_XT_NAT
287 help
288 This enables the `nat' table in iptables. This allows masquerading,
289 port forwarding and other forms of full Network Address Port
290 Translation.
291
292 To compile it as a module, choose M here. If unsure, say N.
293
294if IP_NF_NAT
295
296config IP_NF_TARGET_MASQUERADE
297 tristate "MASQUERADE target support"
298 select NF_NAT_MASQUERADE_IPV4
299 default m if NETFILTER_ADVANCED=n
300 help
301 Masquerading is a special case of NAT: all outgoing connections are
302 changed to seem to come from a particular interface's address, and
303 if the interface goes down, those connections are lost. This is
304 only useful for dialup accounts with dynamic IP address (ie. your IP
305 address will be different on next dialup).
306
307 To compile it as a module, choose M here. If unsure, say N.
308
309config IP_NF_TARGET_NETMAP
310 tristate "NETMAP target support"
311 depends on NETFILTER_ADVANCED
312 select NETFILTER_XT_TARGET_NETMAP
313 ---help---
314 This is a backwards-compat option for the user's convenience
315 (e.g. when running oldconfig). It selects
316 CONFIG_NETFILTER_XT_TARGET_NETMAP.
317
318config IP_NF_TARGET_REDIRECT
319 tristate "REDIRECT target support"
320 depends on NETFILTER_ADVANCED
321 select NETFILTER_XT_TARGET_REDIRECT
322 ---help---
323 This is a backwards-compat option for the user's convenience
324 (e.g. when running oldconfig). It selects
325 CONFIG_NETFILTER_XT_TARGET_REDIRECT.
326
327endif # IP_NF_NAT
328
329# mangle + specific targets
330config IP_NF_MANGLE
331 tristate "Packet mangling"
332 default m if NETFILTER_ADVANCED=n
333 help
334 This option adds a `mangle' table to iptables: see the man page for
335 iptables(8). This table is used for various packet alterations
336 which can effect how the packet is routed.
337
338 To compile it as a module, choose M here. If unsure, say N.
339
340config IP_NF_TARGET_CLUSTERIP
341 tristate "CLUSTERIP target support"
342 depends on IP_NF_MANGLE
343 depends on NF_CONNTRACK_IPV4
344 depends on NETFILTER_ADVANCED
345 select NF_CONNTRACK_MARK
346 select NETFILTER_FAMILY_ARP
347 help
348 The CLUSTERIP target allows you to build load-balancing clusters of
349 network servers without having a dedicated load-balancing
350 router/server/switch.
351
352 To compile it as a module, choose M here. If unsure, say N.
353
354config IP_NF_TARGET_ECN
355 tristate "ECN target support"
356 depends on IP_NF_MANGLE
357 depends on NETFILTER_ADVANCED
358 ---help---
359 This option adds a `ECN' target, which can be used in the iptables mangle
360 table.
361
362 You can use this target to remove the ECN bits from the IPv4 header of
363 an IP packet. This is particularly useful, if you need to work around
364 existing ECN blackholes on the internet, but don't want to disable
365 ECN support in general.
366
367 To compile it as a module, choose M here. If unsure, say N.
368
369config IP_NF_TARGET_TTL
370 tristate '"TTL" target support'
371 depends on NETFILTER_ADVANCED && IP_NF_MANGLE
372 select NETFILTER_XT_TARGET_HL
373 ---help---
374 This is a backwards-compatible option for the user's convenience
375 (e.g. when running oldconfig). It selects
376 CONFIG_NETFILTER_XT_TARGET_HL.
377
378# raw + specific targets
379config IP_NF_RAW
380 tristate 'raw table support (required for NOTRACK/TRACE)'
381 help
382 This option adds a `raw' table to iptables. This table is the very
383 first in the netfilter framework and hooks in at the PREROUTING
384 and OUTPUT chains.
385
386 If you want to compile it as a module, say M here and read
387 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
388
389# security table for MAC policy
390config IP_NF_SECURITY
391 tristate "Security table"
392 depends on SECURITY
393 depends on NETFILTER_ADVANCED
394 help
395 This option adds a `security' table to iptables, for use
396 with Mandatory Access Control (MAC) policy.
397
398 If unsure, say N.
399
400endif # IP_NF_IPTABLES
401
402# ARP tables
403config IP_NF_ARPTABLES
404 tristate "ARP tables support"
405 select NETFILTER_XTABLES
406 select NETFILTER_FAMILY_ARP
407 depends on NETFILTER_ADVANCED
408 help
409 arptables is a general, extensible packet identification framework.
410 The ARP packet filtering and mangling (manipulation)subsystems
411 use this: say Y or M here if you want to use either of those.
412
413 To compile it as a module, choose M here. If unsure, say N.
414
415if IP_NF_ARPTABLES
416
417config IP_NF_ARPFILTER
418 tristate "ARP packet filtering"
419 help
420 ARP packet filtering defines a table `filter', which has a series of
421 rules for simple ARP packet filtering at local input and
422 local output. On a bridge, you can also specify filtering rules
423 for forwarded ARP packets. See the man page for arptables(8).
424
425 To compile it as a module, choose M here. If unsure, say N.
426
427config IP_NF_ARP_MANGLE
428 tristate "ARP payload mangling"
429 help
430 Allows altering the ARP packet payload: source and destination
431 hardware and network addresses.
432
433endif # IP_NF_ARPTABLES
434
435endmenu
436