net/ipv4/netfilter/Kconfig

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