Kconfig 22.4 KB
Newer Older
1
menu "Core Netfilter Configuration"
2
	depends on NET && INET && NETFILTER
3

H
Harald Welte 已提交
4 5 6 7 8
config NETFILTER_NETLINK
       tristate "Netfilter netlink interface"
       help
         If this option is enabled, the kernel will include support
         for the new netfilter netlink interface.
9 10 11 12 13

config NETFILTER_NETLINK_QUEUE
	tristate "Netfilter NFQUEUE over NFNETLINK interface"
	depends on NETFILTER_NETLINK
	help
T
Thomas Vgtle 已提交
14
	  If this option is enabled, the kernel will include support
15 16
	  for queueing packets via NFNETLINK.
	  
17 18 19 20 21 22 23 24 25 26 27
config NETFILTER_NETLINK_LOG
	tristate "Netfilter LOG over NFNETLINK interface"
	depends on NETFILTER_NETLINK
	help
	  If this option is enabled, the kernel will include support
	  for logging packets via NFNETLINK.

	  This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
	  and is also scheduled to replace the old syslog-based ipt_LOG
	  and ip6t_LOG modules.

28 29 30
config NF_CONNTRACK_ENABLED
	tristate "Netfilter connection tracking support"
	help
31 32 33 34
	  Connection tracking keeps a record of what packets have passed
	  through your machine, in order to figure out how they are related
	  into connections.

35 36 37 38 39 40 41 42 43 44 45 46
	  This is required to do Masquerading or other kinds of Network
	  Address Translation (except for Fast NAT).  It can also be used to
	  enhance packet filtering (see `Connection state match support'
	  below).

	  To compile it as a module, choose M here.  If unsure, say N.

choice
	prompt "Netfilter connection tracking support"
	depends on NF_CONNTRACK_ENABLED

config NF_CONNTRACK_SUPPORT
47
	bool "Layer 3 Independent Connection tracking"
48
	help
49 50 51
	  Layer 3 independent connection tracking is experimental scheme
	  which generalize ip_conntrack to support other layer 3 protocols.

52 53 54 55 56 57
	  This is required to do Masquerading or other kinds of Network
	  Address Translation (except for Fast NAT).  It can also be used to
	  enhance packet filtering (see `Connection state match support'
	  below).

config IP_NF_CONNTRACK_SUPPORT
58
	bool "Layer 3 Dependent Connection tracking (OBSOLETE)"
59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77
	help
	  The old, Layer 3 dependent ip_conntrack subsystem of netfilter.

	  This is required to do Masquerading or other kinds of Network
	  Address Translation (except for Fast NAT).  It can also be used to
	  enhance packet filtering (see `Connection state match support'
	  below).

endchoice

config NF_CONNTRACK
	tristate
	default m if NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=m
	default y if NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=y

config IP_NF_CONNTRACK
	tristate
	default m if IP_NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=m
	default y if IP_NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=y
78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

config NF_CT_ACCT
	bool "Connection tracking flow accounting"
	depends on NF_CONNTRACK
	help
	  If this option is enabled, the connection tracking code will
	  keep per-flow packet and byte counters.

	  Those counters can be used for flow-based accounting or the
	  `connbytes' match.

	  If unsure, say `N'.

config NF_CONNTRACK_MARK
	bool  'Connection mark tracking support'
	depends on NF_CONNTRACK
	help
	  This option enables support for connection marks, used by the
	  `CONNMARK' target and `connmark' match. Similar to the mark value
	  of packets, but this mark value is kept in the conntrack session
	  instead of the individual packets.

100 101 102 103 104 105 106 107 108 109 110 111
config NF_CONNTRACK_SECMARK
	bool  'Connection tracking security mark support'
	depends on NF_CONNTRACK && NETWORK_SECMARK
	help
	  This option enables security markings to be applied to
	  connections.  Typically they are copied to connections from
	  packets using the CONNSECMARK target and copied back from
	  connections to packets with the same target, with the packets
	  being originally labeled via SECMARK.

	  If unsure, say 'N'.

112
config NF_CONNTRACK_EVENTS
113 114
	bool "Connection tracking events (EXPERIMENTAL)"
	depends on EXPERIMENTAL && NF_CONNTRACK
115 116 117
	help
	  If this option is enabled, the connection tracking code will
	  provide a notifier chain that can be used by other kernel code
T
Thomas Vgtle 已提交
118
	  to get notified about changes in the connection tracking state.
119 120 121

	  If unsure, say `N'.

122 123
config NF_CT_PROTO_GRE
	tristate
124
	depends on NF_CONNTRACK
125

126
config NF_CT_PROTO_SCTP
127
	tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
128 129 130 131 132 133 134 135 136
	depends on EXPERIMENTAL && NF_CONNTRACK
	default n
	help
	  With this option enabled, the layer 3 independent connection
	  tracking code will be able to do state tracking on SCTP connections.

	  If you want to compile it as a module, say M here and read
	  Documentation/modules.txt.  If unsure, say `N'.

137
config NF_CONNTRACK_AMANDA
138 139
	tristate "Amanda backup protocol support"
	depends on NF_CONNTRACK
140 141 142 143 144 145 146 147 148 149 150 151
	select TEXTSEARCH
	select TEXTSEARCH_KMP
	help
	  If you are running the Amanda backup package <http://www.amanda.org/>
	  on this machine or machines that will be MASQUERADED through this
	  machine, then you may want to enable this feature.  This allows the
	  connection tracking and natting code to allow the sub-channels that
	  Amanda requires for communication of the backup data, messages and
	  index.

	  To compile it as a module, choose M here.  If unsure, say N.

152
config NF_CONNTRACK_FTP
153 154
	tristate "FTP protocol support"
	depends on NF_CONNTRACK
155 156 157 158 159 160 161 162 163 164 165
	help
	  Tracking FTP connections is problematic: special helpers are
	  required for tracking them, and doing masquerading and other forms
	  of Network Address Translation on them.

	  This is FTP support on Layer 3 independent connection tracking.
	  Layer 3 independent connection tracking is experimental scheme
	  which generalize ip_conntrack to support other layer 3 protocols.

	  To compile it as a module, choose M here.  If unsure, say N.

166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
config NF_CONNTRACK_H323
	tristate "H.323 protocol support (EXPERIMENTAL)"
	depends on EXPERIMENTAL && NF_CONNTRACK
	help
	  H.323 is a VoIP signalling protocol from ITU-T. As one of the most
	  important VoIP protocols, it is widely used by voice hardware and
	  software including voice gateways, IP phones, Netmeeting, OpenPhone,
	  Gnomemeeting, etc.

	  With this module you can support H.323 on a connection tracking/NAT
	  firewall.

	  This module supports RAS, Fast Start, H.245 Tunnelling, Call
	  Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
	  whiteboard, file transfer, etc. For more information, please
	  visit http://nath323.sourceforge.net/.

	  To compile it as a module, choose M here.  If unsure, say N.

185
config NF_CONNTRACK_IRC
186 187
	tristate "IRC protocol support"
	depends on NF_CONNTRACK
188 189 190 191 192 193 194 195 196 197 198 199
	help
	  There is a commonly-used extension to IRC called
	  Direct Client-to-Client Protocol (DCC).  This enables users to send
	  files to each other, and also chat to each other without the need
	  of a server.  DCC Sending is used anywhere you send files over IRC,
	  and DCC Chat is most commonly used by Eggdrop bots.  If you are
	  using NAT, this extension will enable you to send files and initiate
	  chats.  Note that you do NOT need this extension to get files or
	  have others initiate chats, or everything else in IRC.

	  To compile it as a module, choose M here.  If unsure, say N.

200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218
config NF_CONNTRACK_NETBIOS_NS
	tristate "NetBIOS name service protocol support (EXPERIMENTAL)"
	depends on EXPERIMENTAL && NF_CONNTRACK
	help
	  NetBIOS name service requests are sent as broadcast messages from an
	  unprivileged port and responded to with unicast messages to the
	  same port. This make them hard to firewall properly because connection
	  tracking doesn't deal with broadcasts. This helper tracks locally
	  originating NetBIOS name service requests and the corresponding
	  responses. It relies on correct IP address configuration, specifically
	  netmask and broadcast address. When properly configured, the output
	  of "ip address show" should look similar to this:

	  $ ip -4 address show eth0
	  4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
	      inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0

	  To compile it as a module, choose M here.  If unsure, say N.

219
config NF_CONNTRACK_PPTP
220 221
	tristate "PPtP protocol support"
	depends on NF_CONNTRACK
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
	select NF_CT_PROTO_GRE
	help
	  This module adds support for PPTP (Point to Point Tunnelling
	  Protocol, RFC2637) connection tracking and NAT.

	  If you are running PPTP sessions over a stateful firewall or NAT
	  box, you may want to enable this feature.

	  Please note that not all PPTP modes of operation are supported yet.
	  Specifically these limitations exist:
	    - Blindy assumes that control connections are always established
	      in PNS->PAC direction. This is a violation of RFC2637.
	    - Only supports a single call within each session

	  To compile it as a module, choose M here.  If unsure, say N.

238 239 240 241 242 243 244 245 246 247 248 249
config NF_CONNTRACK_SIP
	tristate "SIP protocol support (EXPERIMENTAL)"
	depends on EXPERIMENTAL && NF_CONNTRACK
	help
	  SIP is an application-layer control protocol that can establish,
	  modify, and terminate multimedia sessions (conferences) such as
	  Internet telephony calls. With the ip_conntrack_sip and
	  the nf_nat_sip modules you can support the protocol on a connection
	  tracking/NATing firewall.

	  To compile it as a module, choose M here.  If unsure, say N.

250
config NF_CONNTRACK_TFTP
251 252
	tristate "TFTP protocol support"
	depends on NF_CONNTRACK
253 254 255 256 257 258 259 260
	help
	  TFTP connection tracking helper, this is required depending
	  on how restrictive your ruleset is.
	  If you are using a tftp client behind -j SNAT or -j MASQUERADING
	  you will need this.

	  To compile it as a module, choose M here.  If unsure, say N.

261 262 263 264 265 266 267
config NF_CT_NETLINK
	tristate 'Connection tracking netlink interface (EXPERIMENTAL)'
	depends on EXPERIMENTAL && NF_CONNTRACK && NETFILTER_NETLINK
	depends on NF_CONNTRACK!=y || NETFILTER_NETLINK!=m
	help
	  This option enables support for a netlink-based userspace interface

268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
config NETFILTER_XTABLES
	tristate "Netfilter Xtables support (required for ip_tables)"
	help
	  This is required if you intend to use any of ip_tables,
	  ip6_tables or arp_tables.

# alphabetically ordered list of targets

config NETFILTER_XT_TARGET_CLASSIFY
	tristate '"CLASSIFY" target support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `CLASSIFY' target, which enables the user to set
	  the priority of a packet. Some qdiscs can use this value for
	  classification, among these are:

  	  atm, cbq, dsmark, pfifo_fast, htb, prio

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XT_TARGET_CONNMARK
	tristate  '"CONNMARK" target support'
	depends on NETFILTER_XTABLES
	depends on IP_NF_MANGLE || IP6_NF_MANGLE
292
	depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
293 294 295 296 297 298 299 300 301
	help
	  This option adds a `CONNMARK' target, which allows one to manipulate
	  the connection mark value.  Similar to the MARK target, but
	  affects the connection mark value rather than the packet mark value.
	
	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  The module will be called
	  ipt_CONNMARK.o.  If unsure, say `N'.

302 303 304 305 306 307 308 309 310 311 312 313
config NETFILTER_XT_TARGET_DSCP
	tristate '"DSCP" target support'
	depends on NETFILTER_XTABLES
	depends on IP_NF_MANGLE || IP6_NF_MANGLE
	help
	  This option adds a `DSCP' target, which allows you to manipulate
	  the IPv4/IPv6 header DSCP field (differentiated services codepoint).

	  The DSCP field can have any value between 0x0 and 0x3f inclusive.

	  To compile it as a module, choose M here.  If unsure, say N.

314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
config NETFILTER_XT_TARGET_MARK
	tristate '"MARK" target support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `MARK' target, which allows you to create rules
	  in the `mangle' table which alter the netfilter mark (nfmark) field
	  associated with the packet prior to routing. This can change
	  the routing method (see `Use netfilter MARK value as routing
	  key') and can also be used by other subsystems to change their
	  behavior.

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XT_TARGET_NFQUEUE
	tristate '"NFQUEUE" target Support'
	depends on NETFILTER_XTABLES
	help
T
Thomas Vgtle 已提交
331
	  This target replaced the old obsolete QUEUE target.
332 333 334 335 336 337

	  As opposed to QUEUE, it supports 65535 different queues,
	  not just one.

	  To compile it as a module, choose M here.  If unsure, say N.

338 339 340 341 342 343 344 345 346 347 348
config NETFILTER_XT_TARGET_NFLOG
	tristate '"NFLOG" target support'
	depends on NETFILTER_XTABLES
	help
	  This option enables the NFLOG target, which allows to LOG
	  messages through the netfilter logging API, which can use
	  either the old LOG target, the old ULOG target or nfnetlink_log
	  as backend.

	  To compile it as a module, choose M here.  If unsure, say N.

349 350 351 352 353 354 355 356 357 358 359 360 361 362
config NETFILTER_XT_TARGET_NOTRACK
	tristate  '"NOTRACK" target support'
	depends on NETFILTER_XTABLES
	depends on IP_NF_RAW || IP6_NF_RAW
	depends on IP_NF_CONNTRACK || NF_CONNTRACK
	help
	  The NOTRACK target allows a select rule to specify
	  which packets *not* to enter the conntrack/NAT
	  subsystem with all the consequences (no ICMP error tracking,
	  no protocol helpers for the selected packets).
	
	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  If unsure, say `N'.

363 364 365 366 367 368 369 370 371
config NETFILTER_XT_TARGET_SECMARK
	tristate '"SECMARK" target support'
	depends on NETFILTER_XTABLES && NETWORK_SECMARK
	help
	  The SECMARK target allows security marking of network
	  packets, for use with security subsystems.

	  To compile it as a module, choose M here.  If unsure, say N.

372 373
config NETFILTER_XT_TARGET_CONNSECMARK
	tristate '"CONNSECMARK" target support'
374 375 376
	depends on NETFILTER_XTABLES && \
		   ((NF_CONNTRACK && NF_CONNTRACK_SECMARK) || \
		    (IP_NF_CONNTRACK && IP_NF_CONNTRACK_SECMARK))
377 378 379 380 381 382 383 384
	help
	  The CONNSECMARK target copies security markings from packets
	  to connections, and restores security markings from connections
	  to packets (if the packets are not already marked).  This would
	  normally be used in conjunction with the SECMARK target.

	  To compile it as a module, choose M here.  If unsure, say N.

385 386 387 388 389 390 391 392 393 394 395 396 397
config NETFILTER_XT_MATCH_COMMENT
	tristate  '"comment" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `comment' dummy-match, which allows you to put
	  comments in your iptables ruleset.

	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  If unsure, say `N'.

config NETFILTER_XT_MATCH_CONNBYTES
	tristate  '"connbytes" per-connection counter match support'
	depends on NETFILTER_XTABLES
398
	depends on (IP_NF_CONNTRACK && IP_NF_CT_ACCT) || (NF_CT_ACCT && NF_CONNTRACK)
399 400 401 402 403 404 405 406 407 408
	help
	  This option adds a `connbytes' match, which allows you to match the
	  number of bytes and/or packets for each direction within a connection.

	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  If unsure, say `N'.

config NETFILTER_XT_MATCH_CONNMARK
	tristate  '"connmark" connection mark match support'
	depends on NETFILTER_XTABLES
409
	depends on (IP_NF_CONNTRACK && IP_NF_CONNTRACK_MARK) || (NF_CONNTRACK_MARK && NF_CONNTRACK)
410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441
	help
	  This option adds a `connmark' match, which allows you to match the
	  connection mark value previously set for the session by `CONNMARK'. 
	
	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  The module will be called
	  ipt_connmark.o.  If unsure, say `N'.

config NETFILTER_XT_MATCH_CONNTRACK
	tristate '"conntrack" connection tracking match support'
	depends on NETFILTER_XTABLES
	depends on IP_NF_CONNTRACK || NF_CONNTRACK
	help
	  This is a general conntrack match module, a superset of the state match.

	  It allows matching on additional conntrack information, which is
	  useful in complex configurations, such as NAT gateways with multiple
	  internet links or tunnels.

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XT_MATCH_DCCP
	tristate  '"DCCP" protocol match support'
	depends on NETFILTER_XTABLES
	help
	  With this option enabled, you will be able to use the iptables
	  `dccp' match in order to match on DCCP source/destination ports
	  and DCCP flags.

	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  If unsure, say `N'.

442 443 444 445 446 447 448 449 450 451 452
config NETFILTER_XT_MATCH_DSCP
	tristate '"DSCP" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `DSCP' match, which allows you to match against
	  the IPv4/IPv6 header DSCP field (differentiated services codepoint).

	  The DSCP field can have any value between 0x0 and 0x3f inclusive.

	  To compile it as a module, choose M here.  If unsure, say N.

453 454 455 456 457 458 459 460 461
config NETFILTER_XT_MATCH_ESP
	tristate '"ESP" match support'
	depends on NETFILTER_XTABLES
	help
	  This match extension allows you to match a range of SPIs
	  inside ESP header of IPSec packets.

	  To compile it as a module, choose M here.  If unsure, say N.

462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509
config NETFILTER_XT_MATCH_HELPER
	tristate '"helper" match support'
	depends on NETFILTER_XTABLES
	depends on IP_NF_CONNTRACK || NF_CONNTRACK
	help
	  Helper matching allows you to match packets in dynamic connections
	  tracked by a conntrack-helper, ie. ip_conntrack_ftp

	  To compile it as a module, choose M here.  If unsure, say Y.

config NETFILTER_XT_MATCH_LENGTH
	tristate '"length" match support'
	depends on NETFILTER_XTABLES
	help
	  This option allows you to match the length of a packet against a
	  specific value or range of values.

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XT_MATCH_LIMIT
	tristate '"limit" match support'
	depends on NETFILTER_XTABLES
	help
	  limit matching allows you to control the rate at which a rule can be
	  matched: mainly useful in combination with the LOG target ("LOG
	  target support", below) and to avoid some Denial of Service attacks.

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XT_MATCH_MAC
	tristate '"mac" address match support'
	depends on NETFILTER_XTABLES
	help
	  MAC matching allows you to match packets based on the source
	  Ethernet address of the packet.

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XT_MATCH_MARK
	tristate '"mark" match support'
	depends on NETFILTER_XTABLES
	help
	  Netfilter mark matching allows you to match packets based on the
	  `nfmark' value in the packet.  This can be set by the MARK target
	  (see below).

	  To compile it as a module, choose M here.  If unsure, say N.

510 511 512 513 514 515 516 517 518 519
config NETFILTER_XT_MATCH_POLICY
	tristate 'IPsec "policy" match support'
	depends on NETFILTER_XTABLES && XFRM
	help
	  Policy matching allows you to match packets based on the
	  IPsec policy that was used during decapsulation/will
	  be used during encapsulation.

	  To compile it as a module, choose M here.  If unsure, say N.

520 521 522 523 524 525 526 527 528 529
config NETFILTER_XT_MATCH_MULTIPORT
	tristate "Multiple port match support"
	depends on NETFILTER_XTABLES
	help
	  Multiport matching allows you to match TCP or UDP packets based on
	  a series of source or destination ports: normally a rule can only
	  match a single range of ports.

	  To compile it as a module, choose M here.  If unsure, say N.

530 531
config NETFILTER_XT_MATCH_PHYSDEV
	tristate '"physdev" match support'
532
	depends on NETFILTER_XTABLES && BRIDGE && BRIDGE_NETFILTER
533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
	help
	  Physdev packet matching matches against the physical bridge ports
	  the IP packet arrived on or will leave by.

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XT_MATCH_PKTTYPE
	tristate '"pkttype" packet type match support'
	depends on NETFILTER_XTABLES
	help
	  Packet type matching allows you to match a packet by
	  its "class", eg. BROADCAST, MULTICAST, ...

	  Typical usage:
	  iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG

	  To compile it as a module, choose M here.  If unsure, say N.

551 552 553 554 555 556 557 558 559 560
config NETFILTER_XT_MATCH_QUOTA
	tristate '"quota" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `quota' match, which allows to match on a
	  byte counter.

	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  If unsure, say `N'.

561 562 563 564 565 566 567 568 569 570 571 572 573 574 575
config NETFILTER_XT_MATCH_REALM
	tristate  '"realm" match support'
	depends on NETFILTER_XTABLES
	select NET_CLS_ROUTE
	help
	  This option adds a `realm' match, which allows you to use the realm
	  key from the routing subsystem inside iptables.
	
	  This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option 
	  in tc world.
	
	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  If unsure, say `N'.

config NETFILTER_XT_MATCH_SCTP
576 577
	tristate  '"sctp" protocol match support (EXPERIMENTAL)'
	depends on NETFILTER_XTABLES && EXPERIMENTAL
578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596
	help
	  With this option enabled, you will be able to use the 
	  `sctp' match in order to match on SCTP source/destination ports
	  and SCTP chunk types.

	  If you want to compile it as a module, say M here and read
	  <file:Documentation/modules.txt>.  If unsure, say `N'.

config NETFILTER_XT_MATCH_STATE
	tristate '"state" match support'
	depends on NETFILTER_XTABLES
	depends on IP_NF_CONNTRACK || NF_CONNTRACK
	help
	  Connection state matching allows you to match packets based on their
	  relationship to a tracked connection (ie. previous packets).  This
	  is a powerful tool for packet classification.

	  To compile it as a module, choose M here.  If unsure, say N.

597 598 599 600
config NETFILTER_XT_MATCH_STATISTIC
	tristate '"statistic" match support'
	depends on NETFILTER_XTABLES
	help
601 602 603 604
	  This option adds a `statistic' match, which allows you to match
	  on packets periodically or randomly with a given percentage.

	  To compile it as a module, choose M here.  If unsure, say N.
605

606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628
config NETFILTER_XT_MATCH_STRING
	tristate  '"string" match support'
	depends on NETFILTER_XTABLES
	select TEXTSEARCH
	select TEXTSEARCH_KMP
	select TEXTSEARCH_BM
	select TEXTSEARCH_FSM
	help
	  This option adds a `string' match, which allows you to look for
	  pattern matchings in packets.

	  To compile it as a module, choose M here.  If unsure, say N.

config NETFILTER_XT_MATCH_TCPMSS
	tristate '"tcpmss" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `tcpmss' match, which allows you to examine the
	  MSS value of TCP SYN packets, which control the maximum packet size
	  for that connection.

	  To compile it as a module, choose M here.  If unsure, say N.

629 630
config NETFILTER_XT_MATCH_HASHLIMIT
	tristate '"hashlimit" match support'
631
	depends on NETFILTER_XTABLES && (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
632 633 634 635 636 637 638 639 640 641 642
	help
	  This option adds a `hashlimit' match.

	  As opposed to `limit', this match dynamically creates a hash table
	  of limit buckets, based on your selection of source/destination
	  addresses and/or ports.

	  It enables you to express policies like `10kpps for any given
	  destination address' or `500pps from any given source address'
	  with a single rule.

643 644
endmenu