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' | |
f09becc7 PNA |
198 | depends on NETFILTER_ADVANCED |
199 | depends on IP_NF_MANGLE || IP_NF_RAW | |
8f97339d FW |
200 | ---help--- |
201 | This option allows you to match packets whose replies would | |
202 | go out via the interface the packet came in. | |
203 | ||
204 | To compile it as a module, choose M here. If unsure, say N. | |
205 | The module will be called ipt_rpfilter. | |
206 | ||
4323362e JE |
207 | config IP_NF_MATCH_TTL |
208 | tristate '"ttl" match support' | |
209 | depends on NETFILTER_ADVANCED | |
210 | select NETFILTER_XT_MATCH_HL | |
211 | ---help--- | |
212 | This is a backwards-compat option for the user's convenience | |
213 | (e.g. when running oldconfig). It selects | |
67c0d579 | 214 | CONFIG_NETFILTER_XT_MATCH_HL. |
4323362e | 215 | |
1da177e4 LT |
216 | # `filter', generic and specific targets |
217 | config IP_NF_FILTER | |
218 | tristate "Packet filtering" | |
33b8e776 | 219 | default m if NETFILTER_ADVANCED=n |
1da177e4 LT |
220 | help |
221 | Packet filtering defines a table `filter', which has a series of | |
222 | rules for simple packet filtering at local input, forwarding and | |
223 | local output. See the man page for iptables(8). | |
224 | ||
225 | To compile it as a module, choose M here. If unsure, say N. | |
226 | ||
227 | config IP_NF_TARGET_REJECT | |
228 | tristate "REJECT target support" | |
229 | depends on IP_NF_FILTER | |
c8d7b98b | 230 | select NF_REJECT_IPV4 |
33b8e776 | 231 | default m if NETFILTER_ADVANCED=n |
1da177e4 LT |
232 | help |
233 | The REJECT target allows a filtering rule to specify that an ICMP | |
234 | error should be issued in response to an incoming packet, rather | |
235 | than silently being dropped. | |
236 | ||
237 | To compile it as a module, choose M here. If unsure, say N. | |
238 | ||
48b1de4c PM |
239 | config IP_NF_TARGET_SYNPROXY |
240 | tristate "SYNPROXY target support" | |
241 | depends on NF_CONNTRACK && NETFILTER_ADVANCED | |
242 | select NETFILTER_SYNPROXY | |
243 | select SYN_COOKIES | |
244 | help | |
245 | The SYNPROXY target allows you to intercept TCP connections and | |
246 | establish them using syncookies before they are passed on to the | |
247 | server. This allows to avoid conntrack and server resource usage | |
248 | during SYN-flood attacks. | |
249 | ||
250 | To compile it as a module, choose M here. If unsure, say N. | |
251 | ||
5b1158e9 | 252 | # NAT + specific targets: nf_conntrack |
8993cf8e PNA |
253 | config IP_NF_NAT |
254 | tristate "iptables NAT support" | |
c2df73de | 255 | depends on NF_CONNTRACK_IPV4 |
33b8e776 | 256 | default m if NETFILTER_ADVANCED=n |
c7232c99 | 257 | select NF_NAT |
8993cf8e PNA |
258 | select NF_NAT_IPV4 |
259 | select NETFILTER_XT_NAT | |
5b1158e9 | 260 | help |
8993cf8e PNA |
261 | This enables the `nat' table in iptables. This allows masquerading, |
262 | port forwarding and other forms of full Network Address Port | |
263 | Translation. | |
5b1158e9 JK |
264 | |
265 | To compile it as a module, choose M here. If unsure, say N. | |
266 | ||
8993cf8e | 267 | if IP_NF_NAT |
1da177e4 LT |
268 | |
269 | config IP_NF_TARGET_MASQUERADE | |
270 | tristate "MASQUERADE target support" | |
8dd33cc9 | 271 | select NF_NAT_MASQUERADE_IPV4 |
33b8e776 | 272 | default m if NETFILTER_ADVANCED=n |
1da177e4 LT |
273 | help |
274 | Masquerading is a special case of NAT: all outgoing connections are | |
275 | changed to seem to come from a particular interface's address, and | |
276 | if the interface goes down, those connections are lost. This is | |
277 | only useful for dialup accounts with dynamic IP address (ie. your IP | |
278 | address will be different on next dialup). | |
279 | ||
280 | To compile it as a module, choose M here. If unsure, say N. | |
281 | ||
aba0d348 JE |
282 | config IP_NF_TARGET_NETMAP |
283 | tristate "NETMAP target support" | |
33b8e776 | 284 | depends on NETFILTER_ADVANCED |
b3d54b3e JE |
285 | select NETFILTER_XT_TARGET_NETMAP |
286 | ---help--- | |
287 | This is a backwards-compat option for the user's convenience | |
288 | (e.g. when running oldconfig). It selects | |
289 | CONFIG_NETFILTER_XT_TARGET_NETMAP. | |
1da177e4 | 290 | |
aba0d348 JE |
291 | config IP_NF_TARGET_REDIRECT |
292 | tristate "REDIRECT target support" | |
33b8e776 | 293 | depends on NETFILTER_ADVANCED |
2cbc78a2 JE |
294 | select NETFILTER_XT_TARGET_REDIRECT |
295 | ---help--- | |
296 | This is a backwards-compat option for the user's convenience | |
297 | (e.g. when running oldconfig). It selects | |
298 | CONFIG_NETFILTER_XT_TARGET_REDIRECT. | |
1da177e4 | 299 | |
8993cf8e | 300 | endif # IP_NF_NAT |
f587de0e | 301 | |
1da177e4 LT |
302 | # mangle + specific targets |
303 | config IP_NF_MANGLE | |
304 | tristate "Packet mangling" | |
33b8e776 | 305 | default m if NETFILTER_ADVANCED=n |
1da177e4 LT |
306 | help |
307 | This option adds a `mangle' table to iptables: see the man page for | |
308 | iptables(8). This table is used for various packet alterations | |
309 | which can effect how the packet is routed. | |
310 | ||
311 | To compile it as a module, choose M here. If unsure, say N. | |
312 | ||
aba0d348 | 313 | config IP_NF_TARGET_CLUSTERIP |
aec9a0eb KC |
314 | tristate "CLUSTERIP target support" |
315 | depends on IP_NF_MANGLE | |
aba0d348 JE |
316 | depends on NF_CONNTRACK_IPV4 |
317 | depends on NETFILTER_ADVANCED | |
318 | select NF_CONNTRACK_MARK | |
319 | help | |
320 | The CLUSTERIP target allows you to build load-balancing clusters of | |
321 | network servers without having a dedicated load-balancing | |
322 | router/server/switch. | |
323 | ||
324 | To compile it as a module, choose M here. If unsure, say N. | |
325 | ||
1da177e4 LT |
326 | config IP_NF_TARGET_ECN |
327 | tristate "ECN target support" | |
328 | depends on IP_NF_MANGLE | |
33b8e776 | 329 | depends on NETFILTER_ADVANCED |
1da177e4 LT |
330 | ---help--- |
331 | This option adds a `ECN' target, which can be used in the iptables mangle | |
332 | table. | |
333 | ||
334 | You can use this target to remove the ECN bits from the IPv4 header of | |
335 | an IP packet. This is particularly useful, if you need to work around | |
336 | existing ECN blackholes on the internet, but don't want to disable | |
337 | ECN support in general. | |
338 | ||
339 | To compile it as a module, choose M here. If unsure, say N. | |
340 | ||
4323362e JE |
341 | config IP_NF_TARGET_TTL |
342 | tristate '"TTL" target support' | |
76b6717b | 343 | depends on NETFILTER_ADVANCED && IP_NF_MANGLE |
4323362e JE |
344 | select NETFILTER_XT_TARGET_HL |
345 | ---help--- | |
76b6717b | 346 | This is a backwards-compatible option for the user's convenience |
4323362e | 347 | (e.g. when running oldconfig). It selects |
67c0d579 | 348 | CONFIG_NETFILTER_XT_TARGET_HL. |
4323362e | 349 | |
1da177e4 LT |
350 | # raw + specific targets |
351 | config IP_NF_RAW | |
352 | tristate 'raw table support (required for NOTRACK/TRACE)' | |
1da177e4 LT |
353 | help |
354 | This option adds a `raw' table to iptables. This table is the very | |
355 | first in the netfilter framework and hooks in at the PREROUTING | |
356 | and OUTPUT chains. | |
357 | ||
358 | If you want to compile it as a module, say M here and read | |
e403149c | 359 | <file:Documentation/kbuild/modules.txt>. If unsure, say `N'. |
560ee653 JM |
360 | |
361 | # security table for MAC policy | |
362 | config IP_NF_SECURITY | |
363 | tristate "Security table" | |
560ee653 | 364 | depends on SECURITY |
70eed75d | 365 | depends on NETFILTER_ADVANCED |
560ee653 JM |
366 | help |
367 | This option adds a `security' table to iptables, for use | |
368 | with Mandatory Access Control (MAC) policy. | |
369 | ||
370 | If unsure, say N. | |
1da177e4 | 371 | |
c2df73de JE |
372 | endif # IP_NF_IPTABLES |
373 | ||
1da177e4 LT |
374 | # ARP tables |
375 | config IP_NF_ARPTABLES | |
376 | tristate "ARP tables support" | |
a3c941b0 | 377 | select NETFILTER_XTABLES |
33b8e776 | 378 | depends on NETFILTER_ADVANCED |
1da177e4 LT |
379 | help |
380 | arptables is a general, extensible packet identification framework. | |
381 | The ARP packet filtering and mangling (manipulation)subsystems | |
382 | use this: say Y or M here if you want to use either of those. | |
383 | ||
384 | To compile it as a module, choose M here. If unsure, say N. | |
385 | ||
c2df73de JE |
386 | if IP_NF_ARPTABLES |
387 | ||
1da177e4 LT |
388 | config IP_NF_ARPFILTER |
389 | tristate "ARP packet filtering" | |
1da177e4 LT |
390 | help |
391 | ARP packet filtering defines a table `filter', which has a series of | |
392 | rules for simple ARP packet filtering at local input and | |
393 | local output. On a bridge, you can also specify filtering rules | |
394 | for forwarded ARP packets. See the man page for arptables(8). | |
395 | ||
396 | To compile it as a module, choose M here. If unsure, say N. | |
397 | ||
398 | config IP_NF_ARP_MANGLE | |
399 | tristate "ARP payload mangling" | |
1da177e4 LT |
400 | help |
401 | Allows altering the ARP packet payload: source and destination | |
402 | hardware and network addresses. | |
403 | ||
c2df73de JE |
404 | endif # IP_NF_ARPTABLES |
405 | ||
1da177e4 LT |
406 | endmenu |
407 |