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