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1# SPDX-License-Identifier: GPL-2.0-only
2#
3# IP netfilter configuration
4#
5
6menu "IP: Netfilter Configuration"
7 depends on INET && NETFILTER
8
9config NF_DEFRAG_IPV4
10 tristate
11 default n
12
13# old sockopt interface and eval loop
14config IP_NF_IPTABLES_LEGACY
15 tristate "Legacy IP tables support"
16 default n
17 select NETFILTER_XTABLES
18 help
19 iptables is a legacy packet classifier.
20 This is not needed if you are using iptables over nftables
21 (iptables-nft).
22
23config NF_SOCKET_IPV4
24 tristate "IPv4 socket lookup support"
25 help
26 This option enables the IPv4 socket lookup infrastructure. This is
27 is required by the {ip,nf}tables socket match.
28
29config NF_TPROXY_IPV4
30 tristate "IPv4 tproxy support"
31
32if NF_TABLES
33
34config NF_TABLES_IPV4
35 bool "IPv4 nf_tables support"
36 help
37 This option enables the IPv4 support for nf_tables.
38
39if NF_TABLES_IPV4
40
41config NFT_REJECT_IPV4
42 select NF_REJECT_IPV4
43 default NFT_REJECT
44 tristate
45
46config NFT_DUP_IPV4
47 tristate "IPv4 nf_tables packet duplication support"
48 depends on !NF_CONNTRACK || NF_CONNTRACK
49 select NF_DUP_IPV4
50 help
51 This module enables IPv4 packet duplication support for nf_tables.
52
53config NFT_FIB_IPV4
54 select NFT_FIB
55 tristate "nf_tables fib / ip route lookup support"
56 help
57 This module enables IPv4 FIB lookups, e.g. for reverse path filtering.
58 It also allows query of the FIB for the route type, e.g. local, unicast,
59 multicast or blackhole.
60
61endif # NF_TABLES_IPV4
62
63config NF_TABLES_ARP
64 bool "ARP nf_tables support"
65 select NETFILTER_FAMILY_ARP
66 help
67 This option enables the ARP support for nf_tables.
68
69endif # NF_TABLES
70
71config NF_DUP_IPV4
72 tristate "Netfilter IPv4 packet duplication to alternate destination"
73 depends on !NF_CONNTRACK || NF_CONNTRACK
74 help
75 This option enables the nf_dup_ipv4 core, which duplicates an IPv4
76 packet to be rerouted to another destination.
77
78config NF_LOG_ARP
79 tristate "ARP packet logging"
80 default m if NETFILTER_ADVANCED=n
81 select NF_LOG_SYSLOG
82 help
83 This is a backwards-compat option for the user's convenience
84 (e.g. when running oldconfig). It selects CONFIG_NF_LOG_SYSLOG.
85
86config NF_LOG_IPV4
87 tristate "IPv4 packet logging"
88 default m if NETFILTER_ADVANCED=n
89 select NF_LOG_SYSLOG
90 help
91 This is a backwards-compat option for the user's convenience
92 (e.g. when running oldconfig). It selects CONFIG_NF_LOG_SYSLOG.
93
94config NF_REJECT_IPV4
95 tristate "IPv4 packet rejection"
96 default m if NETFILTER_ADVANCED=n
97
98if NF_NAT
99config NF_NAT_SNMP_BASIC
100 tristate "Basic SNMP-ALG support"
101 depends on NF_CONNTRACK_SNMP
102 depends on NETFILTER_ADVANCED
103 default NF_NAT && NF_CONNTRACK_SNMP
104 select ASN1
105 help
106
107 This module implements an Application Layer Gateway (ALG) for
108 SNMP payloads. In conjunction with NAT, it allows a network
109 management system to access multiple private networks with
110 conflicting addresses. It works by modifying IP addresses
111 inside SNMP payloads to match IP-layer NAT mapping.
112
113 This is the "basic" form of SNMP-ALG, as described in RFC 2962
114
115 To compile it as a module, choose M here. If unsure, say N.
116
117config NF_NAT_PPTP
118 tristate
119 depends on NF_CONNTRACK
120 default NF_CONNTRACK_PPTP
121
122config NF_NAT_H323
123 tristate
124 depends on NF_CONNTRACK
125 default NF_CONNTRACK_H323
126
127endif # NF_NAT
128
129config IP_NF_IPTABLES
130 tristate "IP tables support (required for filtering/masq/NAT)"
131 default m if NETFILTER_ADVANCED=n
132 select NETFILTER_XTABLES
133 help
134 iptables is a general, extensible packet identification framework.
135 The packet filtering and full NAT (masquerading, port forwarding,
136 etc) subsystems now use this: say `Y' or `M' here if you want to use
137 either of those.
138
139 To compile it as a module, choose M here. If unsure, say N.
140
141if IP_NF_IPTABLES
142
143# The matches.
144config IP_NF_MATCH_AH
145 tristate '"ah" match support'
146 depends on NETFILTER_ADVANCED
147 help
148 This match extension allows you to match a range of SPIs
149 inside AH header of IPSec packets.
150
151 To compile it as a module, choose M here. If unsure, say N.
152
153config IP_NF_MATCH_ECN
154 tristate '"ecn" match support'
155 depends on NETFILTER_ADVANCED
156 select NETFILTER_XT_MATCH_ECN
157 help
158 This is a backwards-compat option for the user's convenience
159 (e.g. when running oldconfig). It selects
160 CONFIG_NETFILTER_XT_MATCH_ECN.
161
162config IP_NF_MATCH_RPFILTER
163 tristate '"rpfilter" reverse path filter match support'
164 depends on NETFILTER_ADVANCED
165 depends on IP_NF_MANGLE || IP_NF_RAW || NFT_COMPAT
166 help
167 This option allows you to match packets whose replies would
168 go out via the interface the packet came in.
169
170 To compile it as a module, choose M here. If unsure, say N.
171 The module will be called ipt_rpfilter.
172
173config IP_NF_MATCH_TTL
174 tristate '"ttl" match support'
175 depends on NETFILTER_ADVANCED
176 select NETFILTER_XT_MATCH_HL
177 help
178 This is a backwards-compat option for the user's convenience
179 (e.g. when running oldconfig). It selects
180 CONFIG_NETFILTER_XT_MATCH_HL.
181
182# `filter', generic and specific targets
183config IP_NF_FILTER
184 tristate "Packet filtering"
185 default m if NETFILTER_ADVANCED=n
186 select IP_NF_IPTABLES_LEGACY
187 help
188 Packet filtering defines a table `filter', which has a series of
189 rules for simple packet filtering at local input, forwarding and
190 local output. See the man page for iptables(8).
191
192 To compile it as a module, choose M here. If unsure, say N.
193
194config IP_NF_TARGET_REJECT
195 tristate "REJECT target support"
196 depends on IP_NF_FILTER || NFT_COMPAT
197 select NF_REJECT_IPV4
198 default m if NETFILTER_ADVANCED=n
199 help
200 The REJECT target allows a filtering rule to specify that an ICMP
201 error should be issued in response to an incoming packet, rather
202 than silently being dropped.
203
204 To compile it as a module, choose M here. If unsure, say N.
205
206config IP_NF_TARGET_SYNPROXY
207 tristate "SYNPROXY target support"
208 depends on NF_CONNTRACK && NETFILTER_ADVANCED
209 select NETFILTER_SYNPROXY
210 select SYN_COOKIES
211 help
212 The SYNPROXY target allows you to intercept TCP connections and
213 establish them using syncookies before they are passed on to the
214 server. This allows to avoid conntrack and server resource usage
215 during SYN-flood attacks.
216
217 To compile it as a module, choose M here. If unsure, say N.
218
219# NAT + specific targets: nf_conntrack
220config IP_NF_NAT
221 tristate "iptables NAT support"
222 depends on NF_CONNTRACK
223 default m if NETFILTER_ADVANCED=n
224 select NF_NAT
225 select NETFILTER_XT_NAT
226 select IP_NF_IPTABLES_LEGACY
227 help
228 This enables the `nat' table in iptables. This allows masquerading,
229 port forwarding and other forms of full Network Address Port
230 Translation.
231
232 To compile it as a module, choose M here. If unsure, say N.
233
234if IP_NF_NAT
235
236config IP_NF_TARGET_MASQUERADE
237 tristate "MASQUERADE target support"
238 select NETFILTER_XT_TARGET_MASQUERADE
239 help
240 This is a backwards-compat option for the user's convenience
241 (e.g. when running oldconfig). It selects NETFILTER_XT_TARGET_MASQUERADE.
242
243config IP_NF_TARGET_NETMAP
244 tristate "NETMAP target support"
245 depends on NETFILTER_ADVANCED
246 select NETFILTER_XT_TARGET_NETMAP
247 help
248 This is a backwards-compat option for the user's convenience
249 (e.g. when running oldconfig). It selects
250 CONFIG_NETFILTER_XT_TARGET_NETMAP.
251
252config IP_NF_TARGET_REDIRECT
253 tristate "REDIRECT target support"
254 depends on NETFILTER_ADVANCED
255 select NETFILTER_XT_TARGET_REDIRECT
256 help
257 This is a backwards-compat option for the user's convenience
258 (e.g. when running oldconfig). It selects
259 CONFIG_NETFILTER_XT_TARGET_REDIRECT.
260
261endif # IP_NF_NAT
262
263# mangle + specific targets
264config IP_NF_MANGLE
265 tristate "Packet mangling"
266 default m if NETFILTER_ADVANCED=n
267 select IP_NF_IPTABLES_LEGACY
268 help
269 This option adds a `mangle' table to iptables: see the man page for
270 iptables(8). This table is used for various packet alterations
271 which can effect how the packet is routed.
272
273 To compile it as a module, choose M here. If unsure, say N.
274
275config IP_NF_TARGET_ECN
276 tristate "ECN target support"
277 depends on IP_NF_MANGLE || NFT_COMPAT
278 depends on NETFILTER_ADVANCED
279 help
280 This option adds a `ECN' target, which can be used in the iptables mangle
281 table.
282
283 You can use this target to remove the ECN bits from the IPv4 header of
284 an IP packet. This is particularly useful, if you need to work around
285 existing ECN blackholes on the internet, but don't want to disable
286 ECN support in general.
287
288 To compile it as a module, choose M here. If unsure, say N.
289
290config IP_NF_TARGET_TTL
291 tristate '"TTL" target support'
292 depends on NETFILTER_ADVANCED && IP_NF_MANGLE
293 select NETFILTER_XT_TARGET_HL
294 help
295 This is a backwards-compatible option for the user's convenience
296 (e.g. when running oldconfig). It selects
297 CONFIG_NETFILTER_XT_TARGET_HL.
298
299# raw + specific targets
300config IP_NF_RAW
301 tristate 'raw table support (required for NOTRACK/TRACE)'
302 select IP_NF_IPTABLES_LEGACY
303 help
304 This option adds a `raw' table to iptables. This table is the very
305 first in the netfilter framework and hooks in at the PREROUTING
306 and OUTPUT chains.
307
308 If you want to compile it as a module, say M here and read
309 <file:Documentation/kbuild/modules.rst>. If unsure, say `N'.
310
311# security table for MAC policy
312config IP_NF_SECURITY
313 tristate "Security table"
314 depends on SECURITY
315 depends on NETFILTER_ADVANCED
316 select IP_NF_IPTABLES_LEGACY
317 help
318 This option adds a `security' table to iptables, for use
319 with Mandatory Access Control (MAC) policy.
320
321 If unsure, say N.
322
323endif # IP_NF_IPTABLES
324
325# ARP tables
326config IP_NF_ARPTABLES
327 tristate "Legacy ARPTABLES support"
328 depends on NETFILTER_XTABLES
329 default n
330 help
331 arptables is a legacy packet classifier.
332 This is not needed if you are using arptables over nftables
333 (iptables-nft).
334
335config NFT_COMPAT_ARP
336 tristate
337 depends on NF_TABLES_ARP && NFT_COMPAT
338 default m if NFT_COMPAT=m
339 default y if NFT_COMPAT=y
340
341config IP_NF_ARPFILTER
342 tristate "arptables-legacy packet filtering support"
343 select IP_NF_ARPTABLES
344 select NETFILTER_FAMILY_ARP
345 depends on NETFILTER_XTABLES
346 help
347 ARP packet filtering defines a table `filter', which has a series of
348 rules for simple ARP packet filtering at local input and
349 local output. This is only needed for arptables-legacy(8).
350 Neither arptables-nft nor nftables need this to work.
351
352 To compile it as a module, choose M here. If unsure, say N.
353
354config IP_NF_ARP_MANGLE
355 tristate "ARP payload mangling"
356 depends on IP_NF_ARPTABLES || NFT_COMPAT_ARP
357 help
358 Allows altering the ARP packet payload: source and destination
359 hardware and network addresses.
360
361 This option is needed by both arptables-legacy and arptables-nft.
362 It is not used by nftables.
363
364endmenu
365
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 iptables socket match.
33
34if NF_TABLES
35
36config NF_TABLES_IPV4
37 tristate "IPv4 nf_tables support"
38 help
39 This option enables the IPv4 support for nf_tables.
40
41if NF_TABLES_IPV4
42
43config NFT_CHAIN_ROUTE_IPV4
44 tristate "IPv4 nf_tables route chain support"
45 help
46 This option enables the "route" chain for IPv4 in nf_tables. This
47 chain type is used to force packet re-routing after mangling header
48 fields such as the source, destination, type of service and
49 the packet mark.
50
51config NFT_REJECT_IPV4
52 select NF_REJECT_IPV4
53 default NFT_REJECT
54 tristate
55
56config NFT_DUP_IPV4
57 tristate "IPv4 nf_tables packet duplication support"
58 depends on !NF_CONNTRACK || NF_CONNTRACK
59 select NF_DUP_IPV4
60 help
61 This module enables IPv4 packet duplication support for nf_tables.
62
63config NFT_FIB_IPV4
64 select NFT_FIB
65 tristate "nf_tables fib / ip route lookup support"
66 help
67 This module enables IPv4 FIB lookups, e.g. for reverse path filtering.
68 It also allows query of the FIB for the route type, e.g. local, unicast,
69 multicast or blackhole.
70
71endif # NF_TABLES_IPV4
72
73config NF_TABLES_ARP
74 tristate "ARP nf_tables support"
75 help
76 This option enables the ARP support for nf_tables.
77
78endif # NF_TABLES
79
80config NF_DUP_IPV4
81 tristate "Netfilter IPv4 packet duplication to alternate destination"
82 depends on !NF_CONNTRACK || NF_CONNTRACK
83 help
84 This option enables the nf_dup_ipv4 core, which duplicates an IPv4
85 packet to be rerouted to another destination.
86
87config NF_LOG_ARP
88 tristate "ARP packet logging"
89 default m if NETFILTER_ADVANCED=n
90 select NF_LOG_COMMON
91
92config NF_LOG_IPV4
93 tristate "IPv4 packet logging"
94 default m if NETFILTER_ADVANCED=n
95 select NF_LOG_COMMON
96
97config NF_REJECT_IPV4
98 tristate "IPv4 packet rejection"
99 default m if NETFILTER_ADVANCED=n
100
101config NF_NAT_IPV4
102 tristate "IPv4 NAT"
103 depends on NF_CONNTRACK_IPV4
104 default m if NETFILTER_ADVANCED=n
105 select NF_NAT
106 help
107 The IPv4 NAT option allows masquerading, port forwarding and other
108 forms of full Network Address Port Translation. This can be
109 controlled by iptables or nft.
110
111if NF_NAT_IPV4
112
113config NFT_CHAIN_NAT_IPV4
114 depends on NF_TABLES_IPV4
115 tristate "IPv4 nf_tables nat chain support"
116 help
117 This option enables the "nat" chain for IPv4 in nf_tables. This
118 chain type is used to perform Network Address Translation (NAT)
119 packet transformations such as the source, destination address and
120 source and destination ports.
121
122config NF_NAT_MASQUERADE_IPV4
123 tristate "IPv4 masquerade support"
124 help
125 This is the kernel functionality to provide NAT in the masquerade
126 flavour (automatic source address selection).
127
128config NFT_MASQ_IPV4
129 tristate "IPv4 masquerading support for nf_tables"
130 depends on NF_TABLES_IPV4
131 depends on NFT_MASQ
132 select NF_NAT_MASQUERADE_IPV4
133 help
134 This is the expression that provides IPv4 masquerading support for
135 nf_tables.
136
137config NFT_REDIR_IPV4
138 tristate "IPv4 redirect support for nf_tables"
139 depends on NF_TABLES_IPV4
140 depends on NFT_REDIR
141 select NF_NAT_REDIRECT
142 help
143 This is the expression that provides IPv4 redirect support for
144 nf_tables.
145
146config NF_NAT_SNMP_BASIC
147 tristate "Basic SNMP-ALG support"
148 depends on NF_CONNTRACK_SNMP
149 depends on NETFILTER_ADVANCED
150 default NF_NAT && NF_CONNTRACK_SNMP
151 ---help---
152
153 This module implements an Application Layer Gateway (ALG) for
154 SNMP payloads. In conjunction with NAT, it allows a network
155 management system to access multiple private networks with
156 conflicting addresses. It works by modifying IP addresses
157 inside SNMP payloads to match IP-layer NAT mapping.
158
159 This is the "basic" form of SNMP-ALG, as described in RFC 2962
160
161 To compile it as a module, choose M here. If unsure, say N.
162
163config NF_NAT_PROTO_GRE
164 tristate
165 depends on NF_CT_PROTO_GRE
166
167config NF_NAT_PPTP
168 tristate
169 depends on NF_CONNTRACK
170 default NF_CONNTRACK_PPTP
171 select NF_NAT_PROTO_GRE
172
173config NF_NAT_H323
174 tristate
175 depends on NF_CONNTRACK
176 default NF_CONNTRACK_H323
177
178endif # NF_NAT_IPV4
179
180config IP_NF_IPTABLES
181 tristate "IP tables support (required for filtering/masq/NAT)"
182 default m if NETFILTER_ADVANCED=n
183 select NETFILTER_XTABLES
184 help
185 iptables is a general, extensible packet identification framework.
186 The packet filtering and full NAT (masquerading, port forwarding,
187 etc) subsystems now use this: say `Y' or `M' here if you want to use
188 either of those.
189
190 To compile it as a module, choose M here. If unsure, say N.
191
192if IP_NF_IPTABLES
193
194# The matches.
195config IP_NF_MATCH_AH
196 tristate '"ah" match support'
197 depends on NETFILTER_ADVANCED
198 help
199 This match extension allows you to match a range of SPIs
200 inside AH header of IPSec packets.
201
202 To compile it as a module, choose M here. If unsure, say N.
203
204config IP_NF_MATCH_ECN
205 tristate '"ecn" match support'
206 depends on NETFILTER_ADVANCED
207 select NETFILTER_XT_MATCH_ECN
208 ---help---
209 This is a backwards-compat option for the user's convenience
210 (e.g. when running oldconfig). It selects
211 CONFIG_NETFILTER_XT_MATCH_ECN.
212
213config IP_NF_MATCH_RPFILTER
214 tristate '"rpfilter" reverse path filter match support'
215 depends on NETFILTER_ADVANCED
216 depends on IP_NF_MANGLE || IP_NF_RAW
217 ---help---
218 This option allows you to match packets whose replies would
219 go out via the interface the packet came in.
220
221 To compile it as a module, choose M here. If unsure, say N.
222 The module will be called ipt_rpfilter.
223
224config IP_NF_MATCH_TTL
225 tristate '"ttl" match support'
226 depends on NETFILTER_ADVANCED
227 select NETFILTER_XT_MATCH_HL
228 ---help---
229 This is a backwards-compat option for the user's convenience
230 (e.g. when running oldconfig). It selects
231 CONFIG_NETFILTER_XT_MATCH_HL.
232
233# `filter', generic and specific targets
234config IP_NF_FILTER
235 tristate "Packet filtering"
236 default m if NETFILTER_ADVANCED=n
237 help
238 Packet filtering defines a table `filter', which has a series of
239 rules for simple packet filtering at local input, forwarding and
240 local output. See the man page for iptables(8).
241
242 To compile it as a module, choose M here. If unsure, say N.
243
244config IP_NF_TARGET_REJECT
245 tristate "REJECT target support"
246 depends on IP_NF_FILTER
247 select NF_REJECT_IPV4
248 default m if NETFILTER_ADVANCED=n
249 help
250 The REJECT target allows a filtering rule to specify that an ICMP
251 error should be issued in response to an incoming packet, rather
252 than silently being dropped.
253
254 To compile it as a module, choose M here. If unsure, say N.
255
256config IP_NF_TARGET_SYNPROXY
257 tristate "SYNPROXY target support"
258 depends on NF_CONNTRACK && NETFILTER_ADVANCED
259 select NETFILTER_SYNPROXY
260 select SYN_COOKIES
261 help
262 The SYNPROXY target allows you to intercept TCP connections and
263 establish them using syncookies before they are passed on to the
264 server. This allows to avoid conntrack and server resource usage
265 during SYN-flood attacks.
266
267 To compile it as a module, choose M here. If unsure, say N.
268
269# NAT + specific targets: nf_conntrack
270config IP_NF_NAT
271 tristate "iptables NAT support"
272 depends on NF_CONNTRACK_IPV4
273 default m if NETFILTER_ADVANCED=n
274 select NF_NAT
275 select NF_NAT_IPV4
276 select NETFILTER_XT_NAT
277 help
278 This enables the `nat' table in iptables. This allows masquerading,
279 port forwarding and other forms of full Network Address Port
280 Translation.
281
282 To compile it as a module, choose M here. If unsure, say N.
283
284if IP_NF_NAT
285
286config IP_NF_TARGET_MASQUERADE
287 tristate "MASQUERADE target support"
288 select NF_NAT_MASQUERADE_IPV4
289 default m if NETFILTER_ADVANCED=n
290 help
291 Masquerading is a special case of NAT: all outgoing connections are
292 changed to seem to come from a particular interface's address, and
293 if the interface goes down, those connections are lost. This is
294 only useful for dialup accounts with dynamic IP address (ie. your IP
295 address will be different on next dialup).
296
297 To compile it as a module, choose M here. If unsure, say N.
298
299config IP_NF_TARGET_NETMAP
300 tristate "NETMAP target support"
301 depends on NETFILTER_ADVANCED
302 select NETFILTER_XT_TARGET_NETMAP
303 ---help---
304 This is a backwards-compat option for the user's convenience
305 (e.g. when running oldconfig). It selects
306 CONFIG_NETFILTER_XT_TARGET_NETMAP.
307
308config IP_NF_TARGET_REDIRECT
309 tristate "REDIRECT target support"
310 depends on NETFILTER_ADVANCED
311 select NETFILTER_XT_TARGET_REDIRECT
312 ---help---
313 This is a backwards-compat option for the user's convenience
314 (e.g. when running oldconfig). It selects
315 CONFIG_NETFILTER_XT_TARGET_REDIRECT.
316
317endif # IP_NF_NAT
318
319# mangle + specific targets
320config IP_NF_MANGLE
321 tristate "Packet mangling"
322 default m if NETFILTER_ADVANCED=n
323 help
324 This option adds a `mangle' table to iptables: see the man page for
325 iptables(8). This table is used for various packet alterations
326 which can effect how the packet is routed.
327
328 To compile it as a module, choose M here. If unsure, say N.
329
330config IP_NF_TARGET_CLUSTERIP
331 tristate "CLUSTERIP target support"
332 depends on IP_NF_MANGLE
333 depends on NF_CONNTRACK_IPV4
334 depends on NETFILTER_ADVANCED
335 select NF_CONNTRACK_MARK
336 help
337 The CLUSTERIP target allows you to build load-balancing clusters of
338 network servers without having a dedicated load-balancing
339 router/server/switch.
340
341 To compile it as a module, choose M here. If unsure, say N.
342
343config IP_NF_TARGET_ECN
344 tristate "ECN target support"
345 depends on IP_NF_MANGLE
346 depends on NETFILTER_ADVANCED
347 ---help---
348 This option adds a `ECN' target, which can be used in the iptables mangle
349 table.
350
351 You can use this target to remove the ECN bits from the IPv4 header of
352 an IP packet. This is particularly useful, if you need to work around
353 existing ECN blackholes on the internet, but don't want to disable
354 ECN support in general.
355
356 To compile it as a module, choose M here. If unsure, say N.
357
358config IP_NF_TARGET_TTL
359 tristate '"TTL" target support'
360 depends on NETFILTER_ADVANCED && IP_NF_MANGLE
361 select NETFILTER_XT_TARGET_HL
362 ---help---
363 This is a backwards-compatible option for the user's convenience
364 (e.g. when running oldconfig). It selects
365 CONFIG_NETFILTER_XT_TARGET_HL.
366
367# raw + specific targets
368config IP_NF_RAW
369 tristate 'raw table support (required for NOTRACK/TRACE)'
370 help
371 This option adds a `raw' table to iptables. This table is the very
372 first in the netfilter framework and hooks in at the PREROUTING
373 and OUTPUT chains.
374
375 If you want to compile it as a module, say M here and read
376 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
377
378# security table for MAC policy
379config IP_NF_SECURITY
380 tristate "Security table"
381 depends on SECURITY
382 depends on NETFILTER_ADVANCED
383 help
384 This option adds a `security' table to iptables, for use
385 with Mandatory Access Control (MAC) policy.
386
387 If unsure, say N.
388
389endif # IP_NF_IPTABLES
390
391# ARP tables
392config IP_NF_ARPTABLES
393 tristate "ARP tables support"
394 select NETFILTER_XTABLES
395 depends on NETFILTER_ADVANCED
396 help
397 arptables is a general, extensible packet identification framework.
398 The ARP packet filtering and mangling (manipulation)subsystems
399 use this: say Y or M here if you want to use either of those.
400
401 To compile it as a module, choose M here. If unsure, say N.
402
403if IP_NF_ARPTABLES
404
405config IP_NF_ARPFILTER
406 tristate "ARP packet filtering"
407 help
408 ARP packet filtering defines a table `filter', which has a series of
409 rules for simple ARP packet filtering at local input and
410 local output. On a bridge, you can also specify filtering rules
411 for forwarded ARP packets. See the man page for arptables(8).
412
413 To compile it as a module, choose M here. If unsure, say N.
414
415config IP_NF_ARP_MANGLE
416 tristate "ARP payload mangling"
417 help
418 Allows altering the ARP packet payload: source and destination
419 hardware and network addresses.
420
421endif # IP_NF_ARPTABLES
422
423endmenu
424