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 config NF_CONNTRACK_PROC_COMPAT
  29         bool "proc/sysctl compatibility with old connection tracking"
  30         depends on NF_CONNTRACK_IPV4
  31         default y
  32         help
  33           This option enables /proc and sysctl compatibility with the old
  34           layer 3 dependent connection tracking. This is needed to keep
  35           old programs that have not been adapted to the new names working.
  36
  37           If unsure, say Y.
  38
  39 config IP_NF_QUEUE
  40         tristate "IP Userspace queueing via NETLINK (OBSOLETE)"
  41         depends on NETFILTER_ADVANCED
  42         help
  43           Netfilter has the ability to queue packets to user space: the
  44           netlink device can be used to access them using this driver.
  45
  46           This option enables the old IPv4-only "ip_queue" implementation
  47           which has been obsoleted by the new "nfnetlink_queue" code (see
  48           CONFIG_NETFILTER_NETLINK_QUEUE).
  49
  50           To compile it as a module, choose M here.  If unsure, say N.
  51
  52 config IP_NF_IPTABLES
  53         tristate "IP tables support (required for filtering/masq/NAT)"
  54         default m if NETFILTER_ADVANCED=n
  55         select NETFILTER_XTABLES
  56         help
  57           iptables is a general, extensible packet identification framework.
  58           The packet filtering and full NAT (masquerading, port forwarding,
  59           etc) subsystems now use this: say `Y' or `M' here if you want to use
  60           either of those.
  61
  62           To compile it as a module, choose M here.  If unsure, say N.
  63
  64 if IP_NF_IPTABLES
  65
  66 # The matches.
  67 config IP_NF_MATCH_ADDRTYPE
  68         tristate '"addrtype" address type match support'
  69         depends on NETFILTER_ADVANCED
  70         help
  71           This option allows you to match what routing thinks of an address,
  72           eg. UNICAST, LOCAL, BROADCAST, ...
  73
  74           If you want to compile it as a module, say M here and read
  75           <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.
  76
  77 config IP_NF_MATCH_AH
  78         tristate '"ah" match support'
  79         depends on NETFILTER_ADVANCED
  80         help
  81           This match extension allows you to match a range of SPIs
  82           inside AH header of IPSec packets.
  83
  84           To compile it as a module, choose M here.  If unsure, say N.
  85
  86 config IP_NF_MATCH_ECN
  87         tristate '"ecn" match support'
  88         depends on NETFILTER_ADVANCED
  89         help
  90           This option adds a `ECN' match, which allows you to match against
  91           the IPv4 and TCP header ECN fields.
  92
  93           To compile it as a module, choose M here.  If unsure, say N.
  94
  95 config IP_NF_MATCH_TTL
  96         tristate '"ttl" match support'
  97         depends on NETFILTER_ADVANCED
  98         select NETFILTER_XT_MATCH_HL
  99         ---help---
 100         This is a backwards-compat option for the user's convenience
 101         (e.g. when running oldconfig). It selects
 102         CONFIG_NETFILTER_XT_MATCH_HL.
 103
 104 # `filter', generic and specific targets
 105 config IP_NF_FILTER
 106         tristate "Packet filtering"
 107         default m if NETFILTER_ADVANCED=n
 108         help
 109           Packet filtering defines a table `filter', which has a series of
 110           rules for simple packet filtering at local input, forwarding and
 111           local output.  See the man page for iptables(8).
 112
 113           To compile it as a module, choose M here.  If unsure, say N.
 114
 115 config IP_NF_TARGET_REJECT
 116         tristate "REJECT target support"
 117         depends on IP_NF_FILTER
 118         default m if NETFILTER_ADVANCED=n
 119         help
 120           The REJECT target allows a filtering rule to specify that an ICMP
 121           error should be issued in response to an incoming packet, rather
 122           than silently being dropped.
 123
 124           To compile it as a module, choose M here.  If unsure, say N.
 125
 126 config IP_NF_TARGET_LOG
 127         tristate "LOG target support"
 128         default m if NETFILTER_ADVANCED=n
 129         help
 130           This option adds a `LOG' target, which allows you to create rules in
 131           any iptables table which records the packet header to the syslog.
 132
 133           To compile it as a module, choose M here.  If unsure, say N.
 134
 135 config IP_NF_TARGET_ULOG
 136         tristate "ULOG target support"
 137         default m if NETFILTER_ADVANCED=n
 138         ---help---
 139
 140           This option enables the old IPv4-only "ipt_ULOG" implementation
 141           which has been obsoleted by the new "nfnetlink_log" code (see
 142           CONFIG_NETFILTER_NETLINK_LOG).
 143
 144           This option adds a `ULOG' target, which allows you to create rules in
 145           any iptables table. The packet is passed to a userspace logging
 146           daemon using netlink multicast sockets; unlike the LOG target
 147           which can only be viewed through syslog.
 148
 149           The appropriate userspace logging daemon (ulogd) may be obtained from
 150           <http://www.netfilter.org/projects/ulogd/index.html>
 151
 152           To compile it as a module, choose M here.  If unsure, say N.
 153
 154 # NAT + specific targets: nf_conntrack
 155 config NF_NAT
 156         tristate "Full NAT"
 157         depends on NF_CONNTRACK_IPV4
 158         default m if NETFILTER_ADVANCED=n
 159         help
 160           The Full NAT option allows masquerading, port forwarding and other
 161           forms of full Network Address Port Translation.  It is controlled by
 162           the `nat' table in iptables: see the man page for iptables(8).
 163
 164           To compile it as a module, choose M here.  If unsure, say N.
 165
 166 config NF_NAT_NEEDED
 167         bool
 168         depends on NF_NAT
 169         default y
 170
 171 config IP_NF_TARGET_MASQUERADE
 172         tristate "MASQUERADE target support"
 173         depends on NF_NAT
 174         default m if NETFILTER_ADVANCED=n
 175         help
 176           Masquerading is a special case of NAT: all outgoing connections are
 177           changed to seem to come from a particular interface's address, and
 178           if the interface goes down, those connections are lost.  This is
 179           only useful for dialup accounts with dynamic IP address (ie. your IP
 180           address will be different on next dialup).
 181
 182           To compile it as a module, choose M here.  If unsure, say N.
 183
 184 config IP_NF_TARGET_NETMAP
 185         tristate "NETMAP target support"
 186         depends on NF_NAT
 187         depends on NETFILTER_ADVANCED
 188         help
 189           NETMAP is an implementation of static 1:1 NAT mapping of network
 190           addresses. It maps the network address part, while keeping the host
 191           address part intact.
 192
 193           To compile it as a module, choose M here.  If unsure, say N.
 194
 195 config IP_NF_TARGET_REDIRECT
 196         tristate "REDIRECT target support"
 197         depends on NF_NAT
 198         depends on NETFILTER_ADVANCED
 199         help
 200           REDIRECT is a special case of NAT: all incoming connections are
 201           mapped onto the incoming interface's address, causing the packets to
 202           come to the local machine instead of passing through.  This is
 203           useful for transparent proxies.
 204
 205           To compile it as a module, choose M here.  If unsure, say N.
 206
 207 config NF_NAT_SNMP_BASIC
 208         tristate "Basic SNMP-ALG support"
 209         depends on NF_NAT
 210         depends on NETFILTER_ADVANCED
 211         ---help---
 212
 213           This module implements an Application Layer Gateway (ALG) for
 214           SNMP payloads.  In conjunction with NAT, it allows a network
 215           management system to access multiple private networks with
 216           conflicting addresses.  It works by modifying IP addresses
 217           inside SNMP payloads to match IP-layer NAT mapping.
 218
 219           This is the "basic" form of SNMP-ALG, as described in RFC 2962
 220
 221           To compile it as a module, choose M here.  If unsure, say N.
 222
 223 # If they want FTP, set to $CONFIG_IP_NF_NAT (m or y),
 224 # or $CONFIG_IP_NF_FTP (m or y), whichever is weaker.
 225 # From kconfig-language.txt:
 226 #
 227 #           <expr> '&&' <expr>                   (6)
 228 #
 229 # (6) Returns the result of min(/expr/, /expr/).
 230 config NF_NAT_PROTO_DCCP
 231         tristate
 232         depends on NF_NAT && NF_CT_PROTO_DCCP
 233         default NF_NAT && NF_CT_PROTO_DCCP
 234
 235 config NF_NAT_PROTO_GRE
 236         tristate
 237         depends on NF_NAT && NF_CT_PROTO_GRE
 238
 239 config NF_NAT_PROTO_UDPLITE
 240         tristate
 241         depends on NF_NAT && NF_CT_PROTO_UDPLITE
 242         default NF_NAT && NF_CT_PROTO_UDPLITE
 243
 244 config NF_NAT_PROTO_SCTP
 245         tristate
 246         default NF_NAT && NF_CT_PROTO_SCTP
 247         depends on NF_NAT && NF_CT_PROTO_SCTP
 248         select LIBCRC32C
 249
 250 config NF_NAT_FTP
 251         tristate
 252         depends on NF_CONNTRACK && NF_NAT
 253         default NF_NAT && NF_CONNTRACK_FTP
 254
 255 config NF_NAT_IRC
 256         tristate
 257         depends on NF_CONNTRACK && NF_NAT
 258         default NF_NAT && NF_CONNTRACK_IRC
 259
 260 config NF_NAT_TFTP
 261         tristate
 262         depends on NF_CONNTRACK && NF_NAT
 263         default NF_NAT && NF_CONNTRACK_TFTP
 264
 265 config NF_NAT_AMANDA
 266         tristate
 267         depends on NF_CONNTRACK && NF_NAT
 268         default NF_NAT && NF_CONNTRACK_AMANDA
 269
 270 config NF_NAT_PPTP
 271         tristate
 272         depends on NF_CONNTRACK && NF_NAT
 273         default NF_NAT && NF_CONNTRACK_PPTP
 274         select NF_NAT_PROTO_GRE
 275
 276 config NF_NAT_H323
 277         tristate
 278         depends on NF_CONNTRACK && NF_NAT
 279         default NF_NAT && NF_CONNTRACK_H323
 280
 281 config NF_NAT_SIP
 282         tristate
 283         depends on NF_CONNTRACK && NF_NAT
 284         default NF_NAT && NF_CONNTRACK_SIP
 285
 286 # mangle + specific targets
 287 config IP_NF_MANGLE
 288         tristate "Packet mangling"
 289         default m if NETFILTER_ADVANCED=n
 290         help
 291           This option adds a `mangle' table to iptables: see the man page for
 292           iptables(8).  This table is used for various packet alterations
 293           which can effect how the packet is routed.
 294
 295           To compile it as a module, choose M here.  If unsure, say N.
 296
 297 config IP_NF_TARGET_CLUSTERIP
 298         tristate "CLUSTERIP target support (EXPERIMENTAL)"
 299         depends on IP_NF_MANGLE && EXPERIMENTAL
 300         depends on NF_CONNTRACK_IPV4
 301         depends on NETFILTER_ADVANCED
 302         select NF_CONNTRACK_MARK
 303         help
 304           The CLUSTERIP target allows you to build load-balancing clusters of
 305           network servers without having a dedicated load-balancing
 306           router/server/switch.
 307
 308           To compile it as a module, choose M here.  If unsure, say N.
 309
 310 config IP_NF_TARGET_ECN
 311         tristate "ECN target support"
 312         depends on IP_NF_MANGLE
 313         depends on NETFILTER_ADVANCED
 314         ---help---
 315           This option adds a `ECN' target, which can be used in the iptables mangle
 316           table.
 317
 318           You can use this target to remove the ECN bits from the IPv4 header of
 319           an IP packet.  This is particularly useful, if you need to work around
 320           existing ECN blackholes on the internet, but don't want to disable
 321           ECN support in general.
 322
 323           To compile it as a module, choose M here.  If unsure, say N.
 324
 325 config IP_NF_TARGET_TTL
 326         tristate '"TTL" target support'
 327         depends on NETFILTER_ADVANCED
 328         select NETFILTER_XT_TARGET_HL
 329         ---help---
 330         This is a backwards-compat option for the user's convenience
 331         (e.g. when running oldconfig). It selects
 332         CONFIG_NETFILTER_XT_TARGET_HL.
 333
 334 # raw + specific targets
 335 config IP_NF_RAW
 336         tristate  'raw table support (required for NOTRACK/TRACE)'
 337         depends on NETFILTER_ADVANCED
 338         help
 339           This option adds a `raw' table to iptables. This table is the very
 340           first in the netfilter framework and hooks in at the PREROUTING
 341           and OUTPUT chains.
 342
 343           If you want to compile it as a module, say M here and read
 344           <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.
 345
 346 # security table for MAC policy
 347 config IP_NF_SECURITY
 348         tristate "Security table"
 349         depends on SECURITY
 350         depends on NETFILTER_ADVANCED
 351         help
 352           This option adds a `security' table to iptables, for use
 353           with Mandatory Access Control (MAC) policy.
 354
 355           If unsure, say N.
 356
 357 endif # IP_NF_IPTABLES
 358
 359 # ARP tables
 360 config IP_NF_ARPTABLES
 361         tristate "ARP tables support"
 362         select NETFILTER_XTABLES
 363         depends on NETFILTER_ADVANCED
 364         help
 365           arptables is a general, extensible packet identification framework.
 366           The ARP packet filtering and mangling (manipulation)subsystems
 367           use this: say Y or M here if you want to use either of those.
 368
 369           To compile it as a module, choose M here.  If unsure, say N.
 370
 371 if IP_NF_ARPTABLES
 372
 373 config IP_NF_ARPFILTER
 374         tristate "ARP packet filtering"
 375         help
 376           ARP packet filtering defines a table `filter', which has a series of
 377           rules for simple ARP packet filtering at local input and
 378           local output.  On a bridge, you can also specify filtering rules
 379           for forwarded ARP packets. See the man page for arptables(8).
 380
 381           To compile it as a module, choose M here.  If unsure, say N.
 382
 383 config IP_NF_ARP_MANGLE
 384         tristate "ARP payload mangling"
 385         help
 386           Allows altering the ARP packet payload: source and destination
 387           hardware and network addresses.
 388
 389 endif # IP_NF_ARPTABLES
 390
 391 endmenu
 392