Commit | Line | Data |
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1da177e4 LT |
1 | # |
2 | # IP netfilter configuration | |
3 | # | |
4 | ||
5 | menu "IP: Netfilter Configuration" | |
6 | depends on INET && NETFILTER | |
7 | ||
73e4022f KK |
8 | config NF_DEFRAG_IPV4 |
9 | tristate | |
10 | default n | |
11 | ||
9fb9cbb1 | 12 | config NF_CONNTRACK_IPV4 |
c9386cfd PM |
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 |
9fb9cbb1 YK |
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 | ||
a999e683 PM |
28 | config NF_CONNTRACK_PROC_COMPAT |
29 | bool "proc/sysctl compatibility with old connection tracking" | |
54b07dca | 30 | depends on NF_CONNTRACK_PROCFS && NF_CONNTRACK_IPV4 |
a999e683 PM |
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 |
a999e683 PM |
35 | old programs that have not been adapted to the new names working. |
36 | ||
37 | If unsure, say Y. | |
38 | ||
f04e599e | 39 | if NF_TABLES |
c1878869 | 40 | |
96518518 | 41 | config NF_TABLES_IPV4 |
96518518 | 42 | tristate "IPv4 nf_tables support" |
d497c635 PNA |
43 | help |
44 | This option enables the IPv4 support for nf_tables. | |
96518518 | 45 | |
f04e599e PNA |
46 | if NF_TABLES_IPV4 |
47 | ||
9370761c | 48 | config NFT_CHAIN_ROUTE_IPV4 |
9370761c | 49 | tristate "IPv4 nf_tables route chain support" |
d497c635 PNA |
50 | help |
51 | This option enables the "route" chain for IPv4 in nf_tables. This | |
52 | chain type is used to force packet re-routing after mangling header | |
53 | fields such as the source, destination, type of service and | |
54 | the packet mark. | |
96518518 | 55 | |
cc4723ca | 56 | config NFT_REJECT_IPV4 |
c8d7b98b | 57 | select NF_REJECT_IPV4 |
cc4723ca PM |
58 | default NFT_REJECT |
59 | tristate | |
60 | ||
f04e599e PNA |
61 | endif # NF_TABLES_IPV4 |
62 | ||
ed683f13 | 63 | config NF_TABLES_ARP |
ed683f13 | 64 | tristate "ARP nf_tables support" |
d497c635 PNA |
65 | help |
66 | This option enables the ARP support for nf_tables. | |
ed683f13 | 67 | |
f04e599e PNA |
68 | endif # NF_TABLES |
69 | ||
70 | config NF_LOG_ARP | |
71 | tristate "ARP packet logging" | |
72 | default m if NETFILTER_ADVANCED=n | |
73 | select NF_LOG_COMMON | |
74 | ||
75 | config NF_LOG_IPV4 | |
76 | tristate "IPv4 packet logging" | |
77 | default m if NETFILTER_ADVANCED=n | |
78 | select NF_LOG_COMMON | |
79 | ||
80 | config NF_REJECT_IPV4 | |
81 | tristate "IPv4 packet rejection" | |
82 | default m if NETFILTER_ADVANCED=n | |
83 | ||
8993cf8e PNA |
84 | config NF_NAT_IPV4 |
85 | tristate "IPv4 NAT" | |
86 | depends on NF_CONNTRACK_IPV4 | |
87 | default m if NETFILTER_ADVANCED=n | |
88 | select NF_NAT | |
89 | help | |
90 | The IPv4 NAT option allows masquerading, port forwarding and other | |
91 | forms of full Network Address Port Translation. This can be | |
92 | controlled by iptables or nft. | |
93 | ||
94 | if NF_NAT_IPV4 | |
95 | ||
3e8dc212 PNA |
96 | config NFT_CHAIN_NAT_IPV4 |
97 | depends on NF_TABLES_IPV4 | |
98 | tristate "IPv4 nf_tables nat chain support" | |
99 | help | |
100 | This option enables the "nat" chain for IPv4 in nf_tables. This | |
101 | chain type is used to perform Network Address Translation (NAT) | |
102 | packet transformations such as the source, destination address and | |
103 | source and destination ports. | |
104 | ||
0bbe80e5 PNA |
105 | config NF_NAT_MASQUERADE_IPV4 |
106 | tristate "IPv4 masquerade support" | |
107 | help | |
108 | This is the kernel functionality to provide NAT in the masquerade | |
109 | flavour (automatic source address selection). | |
110 | ||
111 | config NFT_MASQ_IPV4 | |
112 | tristate "IPv4 masquerading support for nf_tables" | |
113 | depends on NF_TABLES_IPV4 | |
114 | depends on NFT_MASQ | |
115 | select NF_NAT_MASQUERADE_IPV4 | |
116 | help | |
117 | This is the expression that provides IPv4 masquerading support for | |
118 | nf_tables. | |
119 | ||
e9105f1b AB |
120 | config NFT_REDIR_IPV4 |
121 | tristate "IPv4 redirect support for nf_tables" | |
122 | depends on NF_TABLES_IPV4 | |
123 | depends on NFT_REDIR | |
b59eaf9e | 124 | select NF_NAT_REDIRECT |
e9105f1b AB |
125 | help |
126 | This is the expression that provides IPv4 redirect support for | |
127 | nf_tables. | |
128 | ||
8993cf8e PNA |
129 | config NF_NAT_SNMP_BASIC |
130 | tristate "Basic SNMP-ALG support" | |
131 | depends on NF_CONNTRACK_SNMP | |
132 | depends on NETFILTER_ADVANCED | |
133 | default NF_NAT && NF_CONNTRACK_SNMP | |
134 | ---help--- | |
135 | ||
136 | This module implements an Application Layer Gateway (ALG) for | |
137 | SNMP payloads. In conjunction with NAT, it allows a network | |
138 | management system to access multiple private networks with | |
139 | conflicting addresses. It works by modifying IP addresses | |
140 | inside SNMP payloads to match IP-layer NAT mapping. | |
141 | ||
142 | This is the "basic" form of SNMP-ALG, as described in RFC 2962 | |
143 | ||
144 | To compile it as a module, choose M here. If unsure, say N. | |
145 | ||
146 | config NF_NAT_PROTO_GRE | |
147 | tristate | |
148 | depends on NF_CT_PROTO_GRE | |
149 | ||
150 | config NF_NAT_PPTP | |
151 | tristate | |
152 | depends on NF_CONNTRACK | |
153 | default NF_CONNTRACK_PPTP | |
154 | select NF_NAT_PROTO_GRE | |
155 | ||
156 | config NF_NAT_H323 | |
157 | tristate | |
158 | depends on NF_CONNTRACK | |
159 | default NF_CONNTRACK_H323 | |
160 | ||
161 | endif # NF_NAT_IPV4 | |
162 | ||
1da177e4 LT |
163 | config IP_NF_IPTABLES |
164 | tristate "IP tables support (required for filtering/masq/NAT)" | |
33b8e776 | 165 | default m if NETFILTER_ADVANCED=n |
a3c941b0 | 166 | select NETFILTER_XTABLES |
1da177e4 LT |
167 | help |
168 | iptables is a general, extensible packet identification framework. | |
169 | The packet filtering and full NAT (masquerading, port forwarding, | |
170 | etc) subsystems now use this: say `Y' or `M' here if you want to use | |
171 | either of those. | |
172 | ||
173 | To compile it as a module, choose M here. If unsure, say N. | |
174 | ||
c2df73de JE |
175 | if IP_NF_IPTABLES |
176 | ||
1da177e4 | 177 | # The matches. |
dc5ab2fa | 178 | config IP_NF_MATCH_AH |
4c37799c | 179 | tristate '"ah" match support' |
33b8e776 | 180 | depends on NETFILTER_ADVANCED |
1da177e4 | 181 | help |
dc5ab2fa YK |
182 | This match extension allows you to match a range of SPIs |
183 | inside AH header of IPSec packets. | |
1da177e4 LT |
184 | |
185 | To compile it as a module, choose M here. If unsure, say N. | |
186 | ||
aba0d348 JE |
187 | config IP_NF_MATCH_ECN |
188 | tristate '"ecn" match support' | |
33b8e776 | 189 | depends on NETFILTER_ADVANCED |
d446a820 JE |
190 | select NETFILTER_XT_MATCH_ECN |
191 | ---help--- | |
192 | This is a backwards-compat option for the user's convenience | |
193 | (e.g. when running oldconfig). It selects | |
194 | CONFIG_NETFILTER_XT_MATCH_ECN. | |
1da177e4 | 195 | |
8f97339d FW |
196 | config IP_NF_MATCH_RPFILTER |
197 | tristate '"rpfilter" reverse path filter match support' | |
d37d6968 | 198 | depends on NETFILTER_ADVANCED && (IP_NF_MANGLE || IP_NF_RAW) |
8f97339d FW |
199 | ---help--- |
200 | This option allows you to match packets whose replies would | |
201 | go out via the interface the packet came in. | |
202 | ||
203 | To compile it as a module, choose M here. If unsure, say N. | |
204 | The module will be called ipt_rpfilter. | |
205 | ||
4323362e JE |
206 | config IP_NF_MATCH_TTL |
207 | tristate '"ttl" match support' | |
208 | depends on NETFILTER_ADVANCED | |
209 | select NETFILTER_XT_MATCH_HL | |
210 | ---help--- | |
211 | This is a backwards-compat option for the user's convenience | |
212 | (e.g. when running oldconfig). It selects | |
67c0d579 | 213 | CONFIG_NETFILTER_XT_MATCH_HL. |
4323362e | 214 | |
1da177e4 LT |
215 | # `filter', generic and specific targets |
216 | config IP_NF_FILTER | |
217 | tristate "Packet filtering" | |
33b8e776 | 218 | default m if NETFILTER_ADVANCED=n |
1da177e4 LT |
219 | help |
220 | Packet filtering defines a table `filter', which has a series of | |
221 | rules for simple packet filtering at local input, forwarding and | |
222 | local output. See the man page for iptables(8). | |
223 | ||
224 | To compile it as a module, choose M here. If unsure, say N. | |
225 | ||
226 | config IP_NF_TARGET_REJECT | |
227 | tristate "REJECT target support" | |
228 | depends on IP_NF_FILTER | |
c8d7b98b | 229 | select NF_REJECT_IPV4 |
33b8e776 | 230 | default m if NETFILTER_ADVANCED=n |
1da177e4 LT |
231 | help |
232 | The REJECT target allows a filtering rule to specify that an ICMP | |
233 | error should be issued in response to an incoming packet, rather | |
234 | than silently being dropped. | |
235 | ||
236 | To compile it as a module, choose M here. If unsure, say N. | |
237 | ||
48b1de4c PM |
238 | config IP_NF_TARGET_SYNPROXY |
239 | tristate "SYNPROXY target support" | |
240 | depends on NF_CONNTRACK && NETFILTER_ADVANCED | |
241 | select NETFILTER_SYNPROXY | |
242 | select SYN_COOKIES | |
243 | help | |
244 | The SYNPROXY target allows you to intercept TCP connections and | |
245 | establish them using syncookies before they are passed on to the | |
246 | server. This allows to avoid conntrack and server resource usage | |
247 | during SYN-flood attacks. | |
248 | ||
249 | To compile it as a module, choose M here. If unsure, say N. | |
250 | ||
5b1158e9 | 251 | # NAT + specific targets: nf_conntrack |
8993cf8e PNA |
252 | config IP_NF_NAT |
253 | tristate "iptables NAT support" | |
c2df73de | 254 | depends on NF_CONNTRACK_IPV4 |
33b8e776 | 255 | default m if NETFILTER_ADVANCED=n |
c7232c99 | 256 | select NF_NAT |
8993cf8e PNA |
257 | select NF_NAT_IPV4 |
258 | select NETFILTER_XT_NAT | |
5b1158e9 | 259 | help |
8993cf8e PNA |
260 | This enables the `nat' table in iptables. This allows masquerading, |
261 | port forwarding and other forms of full Network Address Port | |
262 | Translation. | |
5b1158e9 JK |
263 | |
264 | To compile it as a module, choose M here. If unsure, say N. | |
265 | ||
8993cf8e | 266 | if IP_NF_NAT |
1da177e4 LT |
267 | |
268 | config IP_NF_TARGET_MASQUERADE | |
269 | tristate "MASQUERADE target support" | |
8dd33cc9 | 270 | select NF_NAT_MASQUERADE_IPV4 |
33b8e776 | 271 | default m if NETFILTER_ADVANCED=n |
1da177e4 LT |
272 | help |
273 | Masquerading is a special case of NAT: all outgoing connections are | |
274 | changed to seem to come from a particular interface's address, and | |
275 | if the interface goes down, those connections are lost. This is | |
276 | only useful for dialup accounts with dynamic IP address (ie. your IP | |
277 | address will be different on next dialup). | |
278 | ||
279 | To compile it as a module, choose M here. If unsure, say N. | |
280 | ||
aba0d348 JE |
281 | config IP_NF_TARGET_NETMAP |
282 | tristate "NETMAP target support" | |
33b8e776 | 283 | depends on NETFILTER_ADVANCED |
b3d54b3e JE |
284 | select NETFILTER_XT_TARGET_NETMAP |
285 | ---help--- | |
286 | This is a backwards-compat option for the user's convenience | |
287 | (e.g. when running oldconfig). It selects | |
288 | CONFIG_NETFILTER_XT_TARGET_NETMAP. | |
1da177e4 | 289 | |
aba0d348 JE |
290 | config IP_NF_TARGET_REDIRECT |
291 | tristate "REDIRECT target support" | |
33b8e776 | 292 | depends on NETFILTER_ADVANCED |
2cbc78a2 JE |
293 | select NETFILTER_XT_TARGET_REDIRECT |
294 | ---help--- | |
295 | This is a backwards-compat option for the user's convenience | |
296 | (e.g. when running oldconfig). It selects | |
297 | CONFIG_NETFILTER_XT_TARGET_REDIRECT. | |
1da177e4 | 298 | |
8993cf8e | 299 | endif # IP_NF_NAT |
f587de0e | 300 | |
1da177e4 LT |
301 | # mangle + specific targets |
302 | config IP_NF_MANGLE | |
303 | tristate "Packet mangling" | |
33b8e776 | 304 | default m if NETFILTER_ADVANCED=n |
1da177e4 LT |
305 | help |
306 | This option adds a `mangle' table to iptables: see the man page for | |
307 | iptables(8). This table is used for various packet alterations | |
308 | which can effect how the packet is routed. | |
309 | ||
310 | To compile it as a module, choose M here. If unsure, say N. | |
311 | ||
aba0d348 | 312 | config IP_NF_TARGET_CLUSTERIP |
aec9a0eb KC |
313 | tristate "CLUSTERIP target support" |
314 | depends on IP_NF_MANGLE | |
aba0d348 JE |
315 | depends on NF_CONNTRACK_IPV4 |
316 | depends on NETFILTER_ADVANCED | |
317 | select NF_CONNTRACK_MARK | |
318 | help | |
319 | The CLUSTERIP target allows you to build load-balancing clusters of | |
320 | network servers without having a dedicated load-balancing | |
321 | router/server/switch. | |
322 | ||
323 | To compile it as a module, choose M here. If unsure, say N. | |
324 | ||
1da177e4 LT |
325 | config IP_NF_TARGET_ECN |
326 | tristate "ECN target support" | |
327 | depends on IP_NF_MANGLE | |
33b8e776 | 328 | depends on NETFILTER_ADVANCED |
1da177e4 LT |
329 | ---help--- |
330 | This option adds a `ECN' target, which can be used in the iptables mangle | |
331 | table. | |
332 | ||
333 | You can use this target to remove the ECN bits from the IPv4 header of | |
334 | an IP packet. This is particularly useful, if you need to work around | |
335 | existing ECN blackholes on the internet, but don't want to disable | |
336 | ECN support in general. | |
337 | ||
338 | To compile it as a module, choose M here. If unsure, say N. | |
339 | ||
4323362e JE |
340 | config IP_NF_TARGET_TTL |
341 | tristate '"TTL" target support' | |
76b6717b | 342 | depends on NETFILTER_ADVANCED && IP_NF_MANGLE |
4323362e JE |
343 | select NETFILTER_XT_TARGET_HL |
344 | ---help--- | |
76b6717b | 345 | This is a backwards-compatible option for the user's convenience |
4323362e | 346 | (e.g. when running oldconfig). It selects |
67c0d579 | 347 | CONFIG_NETFILTER_XT_TARGET_HL. |
4323362e | 348 | |
1da177e4 LT |
349 | # raw + specific targets |
350 | config IP_NF_RAW | |
351 | tristate 'raw table support (required for NOTRACK/TRACE)' | |
1da177e4 LT |
352 | help |
353 | This option adds a `raw' table to iptables. This table is the very | |
354 | first in the netfilter framework and hooks in at the PREROUTING | |
355 | and OUTPUT chains. | |
356 | ||
357 | If you want to compile it as a module, say M here and read | |
e403149c | 358 | <file:Documentation/kbuild/modules.txt>. If unsure, say `N'. |
560ee653 JM |
359 | |
360 | # security table for MAC policy | |
361 | config IP_NF_SECURITY | |
362 | tristate "Security table" | |
560ee653 | 363 | depends on SECURITY |
70eed75d | 364 | depends on NETFILTER_ADVANCED |
560ee653 JM |
365 | help |
366 | This option adds a `security' table to iptables, for use | |
367 | with Mandatory Access Control (MAC) policy. | |
368 | ||
369 | If unsure, say N. | |
1da177e4 | 370 | |
c2df73de JE |
371 | endif # IP_NF_IPTABLES |
372 | ||
1da177e4 LT |
373 | # ARP tables |
374 | config IP_NF_ARPTABLES | |
375 | tristate "ARP tables support" | |
a3c941b0 | 376 | select NETFILTER_XTABLES |
33b8e776 | 377 | depends on NETFILTER_ADVANCED |
1da177e4 LT |
378 | help |
379 | arptables is a general, extensible packet identification framework. | |
380 | The ARP packet filtering and mangling (manipulation)subsystems | |
381 | use this: say Y or M here if you want to use either of those. | |
382 | ||
383 | To compile it as a module, choose M here. If unsure, say N. | |
384 | ||
c2df73de JE |
385 | if IP_NF_ARPTABLES |
386 | ||
1da177e4 LT |
387 | config IP_NF_ARPFILTER |
388 | tristate "ARP packet filtering" | |
1da177e4 LT |
389 | help |
390 | ARP packet filtering defines a table `filter', which has a series of | |
391 | rules for simple ARP packet filtering at local input and | |
392 | local output. On a bridge, you can also specify filtering rules | |
393 | for forwarded ARP packets. See the man page for arptables(8). | |
394 | ||
395 | To compile it as a module, choose M here. If unsure, say N. | |
396 | ||
397 | config IP_NF_ARP_MANGLE | |
398 | tristate "ARP payload mangling" | |
1da177e4 LT |
399 | help |
400 | Allows altering the ARP packet payload: source and destination | |
401 | hardware and network addresses. | |
402 | ||
c2df73de JE |
403 | endif # IP_NF_ARPTABLES |
404 | ||
1da177e4 LT |
405 | endmenu |
406 |