1 menu "Core Netfilter Configuration"
2 depends on NET && INET && NETFILTER
4 config NETFILTER_INGRESS
5 bool "Netfilter ingress support"
9 This allows you to classify packets from ingress using the Netfilter
12 config NETFILTER_NETLINK
15 config NETFILTER_FAMILY_BRIDGE
18 config NETFILTER_FAMILY_ARP
21 config NETFILTER_NETLINK_ACCT
22 tristate "Netfilter NFACCT over NFNETLINK interface"
23 depends on NETFILTER_ADVANCED
24 select NETFILTER_NETLINK
26 If this option is enabled, the kernel will include support
27 for extended accounting via NFNETLINK.
29 config NETFILTER_NETLINK_QUEUE
30 tristate "Netfilter NFQUEUE over NFNETLINK interface"
31 depends on NETFILTER_ADVANCED
32 select NETFILTER_NETLINK
34 If this option is enabled, the kernel will include support
35 for queueing packets via NFNETLINK.
37 config NETFILTER_NETLINK_LOG
38 tristate "Netfilter LOG over NFNETLINK interface"
39 default m if NETFILTER_ADVANCED=n
40 select NETFILTER_NETLINK
42 If this option is enabled, the kernel will include support
43 for logging packets via NFNETLINK.
45 This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
46 and is also scheduled to replace the old syslog-based ipt_LOG
49 config NETFILTER_NETLINK_OSF
50 tristate "Netfilter OSF over NFNETLINK interface"
51 depends on NETFILTER_ADVANCED
52 select NETFILTER_NETLINK
54 If this option is enabled, the kernel will include support
55 for passive OS fingerprint via NFNETLINK.
58 tristate "Netfilter connection tracking support"
59 default m if NETFILTER_ADVANCED=n
61 select NF_DEFRAG_IPV6 if IPV6 != n
63 Connection tracking keeps a record of what packets have passed
64 through your machine, in order to figure out how they are related
67 This is required to do Masquerading or other kinds of Network
68 Address Translation. It can also be used to enhance packet
69 filtering (see `Connection state match support' below).
71 To compile it as a module, choose M here. If unsure, say N.
77 tristate "Netdev packet logging"
81 config NETFILTER_CONNCOUNT
84 config NF_CONNTRACK_MARK
85 bool 'Connection mark tracking support'
86 depends on NETFILTER_ADVANCED
88 This option enables support for connection marks, used by the
89 `CONNMARK' target and `connmark' match. Similar to the mark value
90 of packets, but this mark value is kept in the conntrack session
91 instead of the individual packets.
93 config NF_CONNTRACK_SECMARK
94 bool 'Connection tracking security mark support'
95 depends on NETWORK_SECMARK
96 default m if NETFILTER_ADVANCED=n
98 This option enables security markings to be applied to
99 connections. Typically they are copied to connections from
100 packets using the CONNSECMARK target and copied back from
101 connections to packets with the same target, with the packets
102 being originally labeled via SECMARK.
106 config NF_CONNTRACK_ZONES
107 bool 'Connection tracking zones'
108 depends on NETFILTER_ADVANCED
110 This option enables support for connection tracking zones.
111 Normally, each connection needs to have a unique system wide
112 identity. Connection tracking zones allow to have multiple
113 connections using the same identity, as long as they are
114 contained in different zones.
118 config NF_CONNTRACK_PROCFS
119 bool "Supply CT list in procfs (OBSOLETE)"
123 This option enables for the list of known conntrack entries
124 to be shown in procfs under net/netfilter/nf_conntrack. This
125 is considered obsolete in favor of using the conntrack(8)
126 tool which uses Netlink.
128 config NF_CONNTRACK_EVENTS
129 bool "Connection tracking events"
130 depends on NETFILTER_ADVANCED
132 If this option is enabled, the connection tracking code will
133 provide a notifier chain that can be used by other kernel code
134 to get notified about changes in the connection tracking state.
138 config NF_CONNTRACK_TIMEOUT
139 bool 'Connection tracking timeout'
140 depends on NETFILTER_ADVANCED
142 This option enables support for connection tracking timeout
143 extension. This allows you to attach timeout policies to flow
148 config NF_CONNTRACK_TIMESTAMP
149 bool 'Connection tracking timestamping'
150 depends on NETFILTER_ADVANCED
152 This option enables support for connection tracking timestamping.
153 This allows you to store the flow start-time and to obtain
154 the flow-stop time (once it has been destroyed) via Connection
159 config NF_CONNTRACK_LABELS
160 bool "Connection tracking labels"
162 This option enables support for assigning user-defined flag bits
163 to connection tracking entries. It can be used with xtables connlabel
164 match and the nftables ct expression.
166 config NF_CT_PROTO_DCCP
167 bool 'DCCP protocol connection tracking support'
168 depends on NETFILTER_ADVANCED
171 With this option enabled, the layer 3 independent connection
172 tracking code will be able to do state tracking on DCCP connections.
176 config NF_CT_PROTO_GRE
179 config NF_CT_PROTO_SCTP
180 bool 'SCTP protocol connection tracking support'
181 depends on NETFILTER_ADVANCED
185 With this option enabled, the layer 3 independent connection
186 tracking code will be able to do state tracking on SCTP connections.
190 config NF_CT_PROTO_UDPLITE
191 bool 'UDP-Lite protocol connection tracking support'
192 depends on NETFILTER_ADVANCED
195 With this option enabled, the layer 3 independent connection
196 tracking code will be able to do state tracking on UDP-Lite
201 config NF_CONNTRACK_AMANDA
202 tristate "Amanda backup protocol support"
203 depends on NETFILTER_ADVANCED
205 select TEXTSEARCH_KMP
207 If you are running the Amanda backup package <http://www.amanda.org/>
208 on this machine or machines that will be MASQUERADED through this
209 machine, then you may want to enable this feature. This allows the
210 connection tracking and natting code to allow the sub-channels that
211 Amanda requires for communication of the backup data, messages and
214 To compile it as a module, choose M here. If unsure, say N.
216 config NF_CONNTRACK_FTP
217 tristate "FTP protocol support"
218 default m if NETFILTER_ADVANCED=n
220 Tracking FTP connections is problematic: special helpers are
221 required for tracking them, and doing masquerading and other forms
222 of Network Address Translation on them.
224 This is FTP support on Layer 3 independent connection tracking.
225 Layer 3 independent connection tracking is experimental scheme
226 which generalize ip_conntrack to support other layer 3 protocols.
228 To compile it as a module, choose M here. If unsure, say N.
230 config NF_CONNTRACK_H323
231 tristate "H.323 protocol support"
232 depends on IPV6 || IPV6=n
233 depends on NETFILTER_ADVANCED
235 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
236 important VoIP protocols, it is widely used by voice hardware and
237 software including voice gateways, IP phones, Netmeeting, OpenPhone,
240 With this module you can support H.323 on a connection tracking/NAT
243 This module supports RAS, Fast Start, H.245 Tunnelling, Call
244 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
245 whiteboard, file transfer, etc. For more information, please
246 visit http://nath323.sourceforge.net/.
248 To compile it as a module, choose M here. If unsure, say N.
250 config NF_CONNTRACK_IRC
251 tristate "IRC protocol support"
252 default m if NETFILTER_ADVANCED=n
254 There is a commonly-used extension to IRC called
255 Direct Client-to-Client Protocol (DCC). This enables users to send
256 files to each other, and also chat to each other without the need
257 of a server. DCC Sending is used anywhere you send files over IRC,
258 and DCC Chat is most commonly used by Eggdrop bots. If you are
259 using NAT, this extension will enable you to send files and initiate
260 chats. Note that you do NOT need this extension to get files or
261 have others initiate chats, or everything else in IRC.
263 To compile it as a module, choose M here. If unsure, say N.
265 config NF_CONNTRACK_BROADCAST
268 config NF_CONNTRACK_NETBIOS_NS
269 tristate "NetBIOS name service protocol support"
270 select NF_CONNTRACK_BROADCAST
272 NetBIOS name service requests are sent as broadcast messages from an
273 unprivileged port and responded to with unicast messages to the
274 same port. This make them hard to firewall properly because connection
275 tracking doesn't deal with broadcasts. This helper tracks locally
276 originating NetBIOS name service requests and the corresponding
277 responses. It relies on correct IP address configuration, specifically
278 netmask and broadcast address. When properly configured, the output
279 of "ip address show" should look similar to this:
281 $ ip -4 address show eth0
282 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
283 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
285 To compile it as a module, choose M here. If unsure, say N.
287 config NF_CONNTRACK_SNMP
288 tristate "SNMP service protocol support"
289 depends on NETFILTER_ADVANCED
290 select NF_CONNTRACK_BROADCAST
292 SNMP service requests are sent as broadcast messages from an
293 unprivileged port and responded to with unicast messages to the
294 same port. This make them hard to firewall properly because connection
295 tracking doesn't deal with broadcasts. This helper tracks locally
296 originating SNMP service requests and the corresponding
297 responses. It relies on correct IP address configuration, specifically
298 netmask and broadcast address.
300 To compile it as a module, choose M here. If unsure, say N.
302 config NF_CONNTRACK_PPTP
303 tristate "PPtP protocol support"
304 depends on NETFILTER_ADVANCED
305 select NF_CT_PROTO_GRE
307 This module adds support for PPTP (Point to Point Tunnelling
308 Protocol, RFC2637) connection tracking and NAT.
310 If you are running PPTP sessions over a stateful firewall or NAT
311 box, you may want to enable this feature.
313 Please note that not all PPTP modes of operation are supported yet.
314 Specifically these limitations exist:
315 - Blindly assumes that control connections are always established
316 in PNS->PAC direction. This is a violation of RFC2637.
317 - Only supports a single call within each session
319 To compile it as a module, choose M here. If unsure, say N.
321 config NF_CONNTRACK_SANE
322 tristate "SANE protocol support"
323 depends on NETFILTER_ADVANCED
325 SANE is a protocol for remote access to scanners as implemented
326 by the 'saned' daemon. Like FTP, it uses separate control and
329 With this module you can support SANE on a connection tracking
332 To compile it as a module, choose M here. If unsure, say N.
334 config NF_CONNTRACK_SIP
335 tristate "SIP protocol support"
336 default m if NETFILTER_ADVANCED=n
338 SIP is an application-layer control protocol that can establish,
339 modify, and terminate multimedia sessions (conferences) such as
340 Internet telephony calls. With the ip_conntrack_sip and
341 the nf_nat_sip modules you can support the protocol on a connection
342 tracking/NATing firewall.
344 To compile it as a module, choose M here. If unsure, say N.
346 config NF_CONNTRACK_TFTP
347 tristate "TFTP protocol support"
348 depends on NETFILTER_ADVANCED
350 TFTP connection tracking helper, this is required depending
351 on how restrictive your ruleset is.
352 If you are using a tftp client behind -j SNAT or -j MASQUERADING
355 To compile it as a module, choose M here. If unsure, say N.
358 tristate 'Connection tracking netlink interface'
359 select NETFILTER_NETLINK
360 default m if NETFILTER_ADVANCED=n
362 This option enables support for a netlink-based userspace interface
364 config NF_CT_NETLINK_TIMEOUT
365 tristate 'Connection tracking timeout tuning via Netlink'
366 select NETFILTER_NETLINK
367 depends on NETFILTER_ADVANCED
368 depends on NF_CONNTRACK_TIMEOUT
370 This option enables support for connection tracking timeout
371 fine-grain tuning. This allows you to attach specific timeout
372 policies to flows, instead of using the global timeout policy.
376 config NF_CT_NETLINK_HELPER
377 tristate 'Connection tracking helpers in user-space via Netlink'
378 select NETFILTER_NETLINK
379 depends on NF_CT_NETLINK
380 depends on NETFILTER_NETLINK_QUEUE
381 depends on NETFILTER_NETLINK_GLUE_CT
382 depends on NETFILTER_ADVANCED
384 This option enables the user-space connection tracking helpers
389 config NETFILTER_NETLINK_GLUE_CT
390 bool "NFQUEUE and NFLOG integration with Connection Tracking"
392 depends on (NETFILTER_NETLINK_QUEUE || NETFILTER_NETLINK_LOG) && NF_CT_NETLINK
394 If this option is enabled, NFQUEUE and NFLOG can include
395 Connection Tracking information together with the packet is
396 the enqueued via NFNETLINK.
406 config NF_NAT_PROTO_DCCP
408 depends on NF_NAT && NF_CT_PROTO_DCCP
409 default NF_NAT && NF_CT_PROTO_DCCP
411 config NF_NAT_PROTO_UDPLITE
413 depends on NF_NAT && NF_CT_PROTO_UDPLITE
414 default NF_NAT && NF_CT_PROTO_UDPLITE
416 config NF_NAT_PROTO_SCTP
418 default NF_NAT && NF_CT_PROTO_SCTP
419 depends on NF_NAT && NF_CT_PROTO_SCTP
423 depends on NF_CONNTRACK && NF_NAT
424 default NF_NAT && NF_CONNTRACK_AMANDA
428 depends on NF_CONNTRACK && NF_NAT
429 default NF_NAT && NF_CONNTRACK_FTP
433 depends on NF_CONNTRACK && NF_NAT
434 default NF_NAT && NF_CONNTRACK_IRC
438 depends on NF_CONNTRACK && NF_NAT
439 default NF_NAT && NF_CONNTRACK_SIP
443 depends on NF_CONNTRACK && NF_NAT
444 default NF_NAT && NF_CONNTRACK_TFTP
446 config NF_NAT_REDIRECT
449 config NETFILTER_SYNPROXY
455 select NETFILTER_NETLINK
456 tristate "Netfilter nf_tables support"
458 nftables is the new packet classification framework that intends to
459 replace the existing {ip,ip6,arp,eb}_tables infrastructure. It
460 provides a pseudo-state machine with an extensible instruction-set
461 (also known as expressions) that the userspace 'nft' utility
462 (http://www.netfilter.org/projects/nftables) uses to build the
463 rule-set. It also comes with the generic set infrastructure that
464 allows you to construct mappings between matchings and actions
465 for performance lookups.
467 To compile it as a module, choose M here.
472 tristate "Netfilter nf_tables set infrastructure"
474 This option enables the nf_tables set infrastructure that allows to
475 look up for elements in a set and to build one-way mappings between
476 matchings and actions.
478 config NF_TABLES_INET
480 select NF_TABLES_IPV4
481 select NF_TABLES_IPV6
482 bool "Netfilter nf_tables mixed IPv4/IPv6 tables support"
484 This option enables support for a mixed IPv4/IPv6 "inet" table.
486 config NF_TABLES_NETDEV
487 bool "Netfilter nf_tables netdev tables support"
489 This option enables support for the "netdev" table.
492 tristate "Netfilter nf_tables number generator module"
494 This option adds the number generator expression used to perform
495 incremental counting and random numbers bound to a upper limit.
498 depends on NF_CONNTRACK
499 tristate "Netfilter nf_tables conntrack module"
501 This option adds the "ct" expression that you can use to match
502 connection tracking information such as the flow state.
504 config NFT_FLOW_OFFLOAD
505 depends on NF_CONNTRACK && NF_FLOW_TABLE
506 tristate "Netfilter nf_tables hardware flow offload module"
508 This option adds the "flow_offload" expression that you can use to
509 choose what flows are placed into the hardware.
512 tristate "Netfilter nf_tables counter module"
514 This option adds the "counter" expression that you can use to
515 include packet and byte counters in a rule.
518 tristate "Netfilter nf_tables connlimit module"
519 depends on NF_CONNTRACK
520 depends on NETFILTER_ADVANCED
521 select NETFILTER_CONNCOUNT
523 This option adds the "connlimit" expression that you can use to
524 ratelimit rule matchings per connections.
527 tristate "Netfilter nf_tables log module"
529 This option adds the "log" expression that you can use to log
530 packets matching some criteria.
533 tristate "Netfilter nf_tables limit module"
535 This option adds the "limit" expression that you can use to
536 ratelimit rule matchings.
539 depends on NF_CONNTRACK
541 tristate "Netfilter nf_tables masquerade support"
543 This option adds the "masquerade" expression that you can use
544 to perform NAT in the masquerade flavour.
547 depends on NF_CONNTRACK
549 tristate "Netfilter nf_tables redirect support"
551 This options adds the "redirect" expression that you can use
552 to perform NAT in the redirect flavour.
555 depends on NF_CONNTRACK
557 tristate "Netfilter nf_tables nat module"
559 This option adds the "nat" expression that you can use to perform
560 typical Network Address Translation (NAT) packet transformations.
563 tristate "Netfilter nf_tables tunnel module"
565 This option adds the "tunnel" expression that you can use to set
569 tristate "Netfilter nf_tables stateful object reference module"
571 This option adds the "objref" expression that allows you to refer to
572 stateful objects, such as counters and quotas.
575 depends on NETFILTER_NETLINK_QUEUE
576 tristate "Netfilter nf_tables queue module"
578 This is required if you intend to use the userspace queueing
579 infrastructure (also known as NFQUEUE) from nftables.
582 tristate "Netfilter nf_tables quota module"
584 This option adds the "quota" expression that you can use to match
585 enforce bytes quotas.
588 default m if NETFILTER_ADVANCED=n
589 tristate "Netfilter nf_tables reject support"
590 depends on !NF_TABLES_INET || (IPV6!=m || m)
592 This option adds the "reject" expression that you can use to
593 explicitly deny and notify via TCP reset/ICMP informational errors
596 config NFT_REJECT_INET
597 depends on NF_TABLES_INET
602 depends on NETFILTER_XTABLES
603 tristate "Netfilter x_tables over nf_tables module"
605 This is required if you intend to use any of existing
606 x_tables match/target extensions over the nf_tables
610 tristate "Netfilter nf_tables hash module"
612 This option adds the "hash" expression that you can use to perform
613 a hash operation on registers.
619 depends on NF_TABLES_INET
620 depends on NFT_FIB_IPV4
621 depends on NFT_FIB_IPV6
622 tristate "Netfilter nf_tables fib inet support"
624 This option allows using the FIB expression from the inet table.
625 The lookup will be delegated to the IPv4 or IPv6 FIB depending
626 on the protocol of the packet.
629 tristate "Netfilter nf_tables socket match support"
630 depends on IPV6 || IPV6=n
631 select NF_SOCKET_IPV4
632 select NF_SOCKET_IPV6 if NF_TABLES_IPV6
634 This option allows matching for the presence or absence of a
635 corresponding socket and its attributes.
638 tristate "Netfilter nf_tables passive OS fingerprint support"
639 depends on NETFILTER_ADVANCED
640 select NETFILTER_NETLINK_OSF
642 This option allows matching packets from an specific OS.
645 tristate "Netfilter nf_tables tproxy support"
646 depends on IPV6 || IPV6=n
647 select NF_DEFRAG_IPV4
648 select NF_DEFRAG_IPV6 if NF_TABLES_IPV6
649 select NF_TPROXY_IPV4
650 select NF_TPROXY_IPV6 if NF_TABLES_IPV6
652 This makes transparent proxy support available in nftables.
657 tristate "Netfilter packet duplication support"
659 This option enables the generic packet duplication infrastructure
662 config NFT_DUP_NETDEV
663 tristate "Netfilter nf_tables netdev packet duplication support"
666 This option enables packet duplication for the "netdev" family.
668 config NFT_FWD_NETDEV
669 tristate "Netfilter nf_tables netdev packet forwarding support"
672 This option enables packet forwarding for the "netdev" family.
674 config NFT_FIB_NETDEV
675 depends on NFT_FIB_IPV4
676 depends on NFT_FIB_IPV6
677 tristate "Netfilter nf_tables netdev fib lookups support"
679 This option allows using the FIB expression from the netdev table.
680 The lookup will be delegated to the IPv4 or IPv6 FIB depending
681 on the protocol of the packet.
683 endif # NF_TABLES_NETDEV
687 config NF_FLOW_TABLE_INET
688 tristate "Netfilter flow table mixed IPv4/IPv6 module"
689 depends on NF_FLOW_TABLE
691 This option adds the flow table mixed IPv4/IPv6 support.
693 To compile it as a module, choose M here.
696 tristate "Netfilter flow table module"
697 depends on NETFILTER_INGRESS
698 depends on NF_CONNTRACK
701 This option adds the flow table core infrastructure.
703 To compile it as a module, choose M here.
705 config NETFILTER_XTABLES
706 tristate "Netfilter Xtables support (required for ip_tables)"
707 default m if NETFILTER_ADVANCED=n
709 This is required if you intend to use any of ip_tables,
710 ip6_tables or arp_tables.
714 comment "Xtables combined modules"
716 config NETFILTER_XT_MARK
717 tristate 'nfmark target and match support'
718 default m if NETFILTER_ADVANCED=n
720 This option adds the "MARK" target and "mark" match.
722 Netfilter mark matching allows you to match packets based on the
723 "nfmark" value in the packet.
724 The target allows you to create rules in the "mangle" table which alter
725 the netfilter mark (nfmark) field associated with the packet.
727 Prior to routing, the nfmark can influence the routing method and can
728 also be used by other subsystems to change their behavior.
730 config NETFILTER_XT_CONNMARK
731 tristate 'ctmark target and match support'
732 depends on NF_CONNTRACK
733 depends on NETFILTER_ADVANCED
734 select NF_CONNTRACK_MARK
736 This option adds the "CONNMARK" target and "connmark" match.
738 Netfilter allows you to store a mark value per connection (a.k.a.
739 ctmark), similarly to the packet mark (nfmark). Using this
740 target and match, you can set and match on this mark.
742 config NETFILTER_XT_SET
743 tristate 'set target and match support'
745 depends on NETFILTER_ADVANCED
747 This option adds the "SET" target and "set" match.
749 Using this target and match, you can add/delete and match
750 elements in the sets created by ipset(8).
752 To compile it as a module, choose M here. If unsure, say N.
754 # alphabetically ordered list of targets
756 comment "Xtables targets"
758 config NETFILTER_XT_TARGET_AUDIT
759 tristate "AUDIT target support"
761 depends on NETFILTER_ADVANCED
763 This option adds a 'AUDIT' target, which can be used to create
764 audit records for packets dropped/accepted.
766 To compileit as a module, choose M here. If unsure, say N.
768 config NETFILTER_XT_TARGET_CHECKSUM
769 tristate "CHECKSUM target support"
770 depends on IP_NF_MANGLE || IP6_NF_MANGLE
771 depends on NETFILTER_ADVANCED
773 This option adds a `CHECKSUM' target, which can be used in the iptables mangle
774 table to work around buggy DHCP clients in virtualized environments.
776 Some old DHCP clients drop packets because they are not aware
777 that the checksum would normally be offloaded to hardware and
778 thus should be considered valid.
779 This target can be used to fill in the checksum using iptables
780 when such packets are sent via a virtual network device.
782 To compile it as a module, choose M here. If unsure, say N.
784 config NETFILTER_XT_TARGET_CLASSIFY
785 tristate '"CLASSIFY" target support'
786 depends on NETFILTER_ADVANCED
788 This option adds a `CLASSIFY' target, which enables the user to set
789 the priority of a packet. Some qdiscs can use this value for
790 classification, among these are:
792 atm, cbq, dsmark, pfifo_fast, htb, prio
794 To compile it as a module, choose M here. If unsure, say N.
796 config NETFILTER_XT_TARGET_CONNMARK
797 tristate '"CONNMARK" target support'
798 depends on NF_CONNTRACK
799 depends on NETFILTER_ADVANCED
800 select NETFILTER_XT_CONNMARK
802 This is a backwards-compat option for the user's convenience
803 (e.g. when running oldconfig). It selects
804 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
806 config NETFILTER_XT_TARGET_CONNSECMARK
807 tristate '"CONNSECMARK" target support'
808 depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
809 default m if NETFILTER_ADVANCED=n
811 The CONNSECMARK target copies security markings from packets
812 to connections, and restores security markings from connections
813 to packets (if the packets are not already marked). This would
814 normally be used in conjunction with the SECMARK target.
816 To compile it as a module, choose M here. If unsure, say N.
818 config NETFILTER_XT_TARGET_CT
819 tristate '"CT" target support'
820 depends on NF_CONNTRACK
821 depends on IP_NF_RAW || IP6_NF_RAW
822 depends on NETFILTER_ADVANCED
824 This options adds a `CT' target, which allows to specify initial
825 connection tracking parameters like events to be delivered and
826 the helper to be used.
828 To compile it as a module, choose M here. If unsure, say N.
830 config NETFILTER_XT_TARGET_DSCP
831 tristate '"DSCP" and "TOS" target support'
832 depends on IP_NF_MANGLE || IP6_NF_MANGLE
833 depends on NETFILTER_ADVANCED
835 This option adds a `DSCP' target, which allows you to manipulate
836 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
838 The DSCP field can have any value between 0x0 and 0x3f inclusive.
840 It also adds the "TOS" target, which allows you to create rules in
841 the "mangle" table which alter the Type Of Service field of an IPv4
842 or the Priority field of an IPv6 packet, prior to routing.
844 To compile it as a module, choose M here. If unsure, say N.
846 config NETFILTER_XT_TARGET_HL
847 tristate '"HL" hoplimit target support'
848 depends on IP_NF_MANGLE || IP6_NF_MANGLE
849 depends on NETFILTER_ADVANCED
851 This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
852 targets, which enable the user to change the
853 hoplimit/time-to-live value of the IP header.
855 While it is safe to decrement the hoplimit/TTL value, the
856 modules also allow to increment and set the hoplimit value of
857 the header to arbitrary values. This is EXTREMELY DANGEROUS
858 since you can easily create immortal packets that loop
859 forever on the network.
861 config NETFILTER_XT_TARGET_HMARK
862 tristate '"HMARK" target support'
863 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
864 depends on NETFILTER_ADVANCED
866 This option adds the "HMARK" target.
868 The target allows you to create rules in the "raw" and "mangle" tables
869 which set the skbuff mark by means of hash calculation within a given
870 range. The nfmark can influence the routing method and can also be used
871 by other subsystems to change their behaviour.
873 To compile it as a module, choose M here. If unsure, say N.
875 config NETFILTER_XT_TARGET_IDLETIMER
876 tristate "IDLETIMER target support"
877 depends on NETFILTER_ADVANCED
880 This option adds the `IDLETIMER' target. Each matching packet
881 resets the timer associated with label specified when the rule is
882 added. When the timer expires, it triggers a sysfs notification.
883 The remaining time for expiration can be read via sysfs.
885 To compile it as a module, choose M here. If unsure, say N.
887 config NETFILTER_XT_TARGET_LED
888 tristate '"LED" target support'
889 depends on LEDS_CLASS && LEDS_TRIGGERS
890 depends on NETFILTER_ADVANCED
892 This option adds a `LED' target, which allows you to blink LEDs in
893 response to particular packets passing through your machine.
895 This can be used to turn a spare LED into a network activity LED,
896 which only flashes in response to FTP transfers, for example. Or
897 you could have an LED which lights up for a minute or two every time
898 somebody connects to your machine via SSH.
900 You will need support for the "led" class to make this work.
902 To create an LED trigger for incoming SSH traffic:
903 iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
905 Then attach the new trigger to an LED on your system:
906 echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
908 For more information on the LEDs available on your system, see
909 Documentation/leds/leds-class.txt
911 config NETFILTER_XT_TARGET_LOG
912 tristate "LOG target support"
915 select NF_LOG_IPV6 if IP6_NF_IPTABLES
916 default m if NETFILTER_ADVANCED=n
918 This option adds a `LOG' target, which allows you to create rules in
919 any iptables table which records the packet header to the syslog.
921 To compile it as a module, choose M here. If unsure, say N.
923 config NETFILTER_XT_TARGET_MARK
924 tristate '"MARK" target support'
925 depends on NETFILTER_ADVANCED
926 select NETFILTER_XT_MARK
928 This is a backwards-compat option for the user's convenience
929 (e.g. when running oldconfig). It selects
930 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
932 config NETFILTER_XT_NAT
933 tristate '"SNAT and DNAT" targets support'
936 This option enables the SNAT and DNAT targets.
938 To compile it as a module, choose M here. If unsure, say N.
940 config NETFILTER_XT_TARGET_NETMAP
941 tristate '"NETMAP" target support'
944 NETMAP is an implementation of static 1:1 NAT mapping of network
945 addresses. It maps the network address part, while keeping the host
948 To compile it as a module, choose M here. If unsure, say N.
950 config NETFILTER_XT_TARGET_NFLOG
951 tristate '"NFLOG" target support'
952 default m if NETFILTER_ADVANCED=n
953 select NETFILTER_NETLINK_LOG
955 This option enables the NFLOG target, which allows to LOG
956 messages through nfnetlink_log.
958 To compile it as a module, choose M here. If unsure, say N.
960 config NETFILTER_XT_TARGET_NFQUEUE
961 tristate '"NFQUEUE" target Support'
962 depends on NETFILTER_ADVANCED
963 select NETFILTER_NETLINK_QUEUE
965 This target replaced the old obsolete QUEUE target.
967 As opposed to QUEUE, it supports 65535 different queues,
970 To compile it as a module, choose M here. If unsure, say N.
972 config NETFILTER_XT_TARGET_NOTRACK
973 tristate '"NOTRACK" target support (DEPRECATED)'
974 depends on NF_CONNTRACK
975 depends on IP_NF_RAW || IP6_NF_RAW
976 depends on NETFILTER_ADVANCED
977 select NETFILTER_XT_TARGET_CT
979 config NETFILTER_XT_TARGET_RATEEST
980 tristate '"RATEEST" target support'
981 depends on NETFILTER_ADVANCED
983 This option adds a `RATEEST' target, which allows to measure
984 rates similar to TC estimators. The `rateest' match can be
985 used to match on the measured rates.
987 To compile it as a module, choose M here. If unsure, say N.
989 config NETFILTER_XT_TARGET_REDIRECT
990 tristate "REDIRECT target support"
992 select NF_NAT_REDIRECT
994 REDIRECT is a special case of NAT: all incoming connections are
995 mapped onto the incoming interface's address, causing the packets to
996 come to the local machine instead of passing through. This is
997 useful for transparent proxies.
999 To compile it as a module, choose M here. If unsure, say N.
1001 config NETFILTER_XT_TARGET_TEE
1002 tristate '"TEE" - packet cloning to alternate destination'
1003 depends on NETFILTER_ADVANCED
1004 depends on IPV6 || IPV6=n
1005 depends on !NF_CONNTRACK || NF_CONNTRACK
1006 depends on IP6_NF_IPTABLES || !IP6_NF_IPTABLES
1008 select NF_DUP_IPV6 if IP6_NF_IPTABLES
1010 This option adds a "TEE" target with which a packet can be cloned and
1011 this clone be rerouted to another nexthop.
1013 config NETFILTER_XT_TARGET_TPROXY
1014 tristate '"TPROXY" target transparent proxying support'
1015 depends on NETFILTER_XTABLES
1016 depends on NETFILTER_ADVANCED
1017 depends on IPV6 || IPV6=n
1018 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1019 depends on IP_NF_MANGLE
1020 select NF_DEFRAG_IPV4
1021 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES != n
1022 select NF_TPROXY_IPV4
1023 select NF_TPROXY_IPV6 if IP6_NF_IPTABLES
1025 This option adds a `TPROXY' target, which is somewhat similar to
1026 REDIRECT. It can only be used in the mangle table and is useful
1027 to redirect traffic to a transparent proxy. It does _not_ depend
1028 on Netfilter connection tracking and NAT, unlike REDIRECT.
1029 For it to work you will have to configure certain iptables rules
1030 and use policy routing. For more information on how to set it up
1031 see Documentation/networking/tproxy.txt.
1033 To compile it as a module, choose M here. If unsure, say N.
1035 config NETFILTER_XT_TARGET_TRACE
1036 tristate '"TRACE" target support'
1037 depends on IP_NF_RAW || IP6_NF_RAW
1038 depends on NETFILTER_ADVANCED
1040 The TRACE target allows you to mark packets so that the kernel
1041 will log every rule which match the packets as those traverse
1042 the tables, chains, rules.
1044 If you want to compile it as a module, say M here and read
1045 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1047 config NETFILTER_XT_TARGET_SECMARK
1048 tristate '"SECMARK" target support'
1049 depends on NETWORK_SECMARK
1050 default m if NETFILTER_ADVANCED=n
1052 The SECMARK target allows security marking of network
1053 packets, for use with security subsystems.
1055 To compile it as a module, choose M here. If unsure, say N.
1057 config NETFILTER_XT_TARGET_TCPMSS
1058 tristate '"TCPMSS" target support'
1059 depends on IPV6 || IPV6=n
1060 default m if NETFILTER_ADVANCED=n
1062 This option adds a `TCPMSS' target, which allows you to alter the
1063 MSS value of TCP SYN packets, to control the maximum size for that
1064 connection (usually limiting it to your outgoing interface's MTU
1067 This is used to overcome criminally braindead ISPs or servers which
1068 block ICMP Fragmentation Needed packets. The symptoms of this
1069 problem are that everything works fine from your Linux
1070 firewall/router, but machines behind it can never exchange large
1072 1) Web browsers connect, then hang with no data received.
1073 2) Small mail works fine, but large emails hang.
1074 3) ssh works fine, but scp hangs after initial handshaking.
1076 Workaround: activate this option and add a rule to your firewall
1079 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
1080 -j TCPMSS --clamp-mss-to-pmtu
1082 To compile it as a module, choose M here. If unsure, say N.
1084 config NETFILTER_XT_TARGET_TCPOPTSTRIP
1085 tristate '"TCPOPTSTRIP" target support'
1086 depends on IP_NF_MANGLE || IP6_NF_MANGLE
1087 depends on NETFILTER_ADVANCED
1089 This option adds a "TCPOPTSTRIP" target, which allows you to strip
1090 TCP options from TCP packets.
1092 # alphabetically ordered list of matches
1094 comment "Xtables matches"
1096 config NETFILTER_XT_MATCH_ADDRTYPE
1097 tristate '"addrtype" address type match support'
1098 default m if NETFILTER_ADVANCED=n
1100 This option allows you to match what routing thinks of an address,
1101 eg. UNICAST, LOCAL, BROADCAST, ...
1103 If you want to compile it as a module, say M here and read
1104 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1106 config NETFILTER_XT_MATCH_BPF
1107 tristate '"bpf" match support'
1108 depends on NETFILTER_ADVANCED
1110 BPF matching applies a linux socket filter to each packet and
1111 accepts those for which the filter returns non-zero.
1113 To compile it as a module, choose M here. If unsure, say N.
1115 config NETFILTER_XT_MATCH_CGROUP
1116 tristate '"control group" match support'
1117 depends on NETFILTER_ADVANCED
1119 select CGROUP_NET_CLASSID
1121 Socket/process control group matching allows you to match locally
1122 generated packets based on which net_cls control group processes
1125 config NETFILTER_XT_MATCH_CLUSTER
1126 tristate '"cluster" match support'
1127 depends on NF_CONNTRACK
1128 depends on NETFILTER_ADVANCED
1130 This option allows you to build work-load-sharing clusters of
1131 network servers/stateful firewalls without having a dedicated
1132 load-balancing router/server/switch. Basically, this match returns
1133 true when the packet must be handled by this cluster node. Thus,
1134 all nodes see all packets and this match decides which node handles
1135 what packets. The work-load sharing algorithm is based on source
1138 If you say Y or M here, try `iptables -m cluster --help` for
1141 config NETFILTER_XT_MATCH_COMMENT
1142 tristate '"comment" match support'
1143 depends on NETFILTER_ADVANCED
1145 This option adds a `comment' dummy-match, which allows you to put
1146 comments in your iptables ruleset.
1148 If you want to compile it as a module, say M here and read
1149 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1151 config NETFILTER_XT_MATCH_CONNBYTES
1152 tristate '"connbytes" per-connection counter match support'
1153 depends on NF_CONNTRACK
1154 depends on NETFILTER_ADVANCED
1156 This option adds a `connbytes' match, which allows you to match the
1157 number of bytes and/or packets for each direction within a connection.
1159 If you want to compile it as a module, say M here and read
1160 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1162 config NETFILTER_XT_MATCH_CONNLABEL
1163 tristate '"connlabel" match support'
1164 select NF_CONNTRACK_LABELS
1165 depends on NF_CONNTRACK
1166 depends on NETFILTER_ADVANCED
1168 This match allows you to test and assign userspace-defined labels names
1169 to a connection. The kernel only stores bit values - mapping
1170 names to bits is done by userspace.
1172 Unlike connmark, more than 32 flag bits may be assigned to a
1173 connection simultaneously.
1175 config NETFILTER_XT_MATCH_CONNLIMIT
1176 tristate '"connlimit" match support'
1177 depends on NF_CONNTRACK
1178 depends on NETFILTER_ADVANCED
1179 select NETFILTER_CONNCOUNT
1181 This match allows you to match against the number of parallel
1182 connections to a server per client IP address (or address block).
1184 config NETFILTER_XT_MATCH_CONNMARK
1185 tristate '"connmark" connection mark match support'
1186 depends on NF_CONNTRACK
1187 depends on NETFILTER_ADVANCED
1188 select NETFILTER_XT_CONNMARK
1190 This is a backwards-compat option for the user's convenience
1191 (e.g. when running oldconfig). It selects
1192 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
1194 config NETFILTER_XT_MATCH_CONNTRACK
1195 tristate '"conntrack" connection tracking match support'
1196 depends on NF_CONNTRACK
1197 default m if NETFILTER_ADVANCED=n
1199 This is a general conntrack match module, a superset of the state match.
1201 It allows matching on additional conntrack information, which is
1202 useful in complex configurations, such as NAT gateways with multiple
1203 internet links or tunnels.
1205 To compile it as a module, choose M here. If unsure, say N.
1207 config NETFILTER_XT_MATCH_CPU
1208 tristate '"cpu" match support'
1209 depends on NETFILTER_ADVANCED
1211 CPU matching allows you to match packets based on the CPU
1212 currently handling the packet.
1214 To compile it as a module, choose M here. If unsure, say N.
1216 config NETFILTER_XT_MATCH_DCCP
1217 tristate '"dccp" protocol match support'
1218 depends on NETFILTER_ADVANCED
1221 With this option enabled, you will be able to use the iptables
1222 `dccp' match in order to match on DCCP source/destination ports
1225 If you want to compile it as a module, say M here and read
1226 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1228 config NETFILTER_XT_MATCH_DEVGROUP
1229 tristate '"devgroup" match support'
1230 depends on NETFILTER_ADVANCED
1232 This options adds a `devgroup' match, which allows to match on the
1233 device group a network device is assigned to.
1235 To compile it as a module, choose M here. If unsure, say N.
1237 config NETFILTER_XT_MATCH_DSCP
1238 tristate '"dscp" and "tos" match support'
1239 depends on NETFILTER_ADVANCED
1241 This option adds a `DSCP' match, which allows you to match against
1242 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
1244 The DSCP field can have any value between 0x0 and 0x3f inclusive.
1246 It will also add a "tos" match, which allows you to match packets
1247 based on the Type Of Service fields of the IPv4 packet (which share
1248 the same bits as DSCP).
1250 To compile it as a module, choose M here. If unsure, say N.
1252 config NETFILTER_XT_MATCH_ECN
1253 tristate '"ecn" match support'
1254 depends on NETFILTER_ADVANCED
1256 This option adds an "ECN" match, which allows you to match against
1257 the IPv4 and TCP header ECN fields.
1259 To compile it as a module, choose M here. If unsure, say N.
1261 config NETFILTER_XT_MATCH_ESP
1262 tristate '"esp" match support'
1263 depends on NETFILTER_ADVANCED
1265 This match extension allows you to match a range of SPIs
1266 inside ESP header of IPSec packets.
1268 To compile it as a module, choose M here. If unsure, say N.
1270 config NETFILTER_XT_MATCH_HASHLIMIT
1271 tristate '"hashlimit" match support'
1272 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1273 depends on NETFILTER_ADVANCED
1275 This option adds a `hashlimit' match.
1277 As opposed to `limit', this match dynamically creates a hash table
1278 of limit buckets, based on your selection of source/destination
1279 addresses and/or ports.
1281 It enables you to express policies like `10kpps for any given
1282 destination address' or `500pps from any given source address'
1285 config NETFILTER_XT_MATCH_HELPER
1286 tristate '"helper" match support'
1287 depends on NF_CONNTRACK
1288 depends on NETFILTER_ADVANCED
1290 Helper matching allows you to match packets in dynamic connections
1291 tracked by a conntrack-helper, ie. ip_conntrack_ftp
1293 To compile it as a module, choose M here. If unsure, say Y.
1295 config NETFILTER_XT_MATCH_HL
1296 tristate '"hl" hoplimit/TTL match support'
1297 depends on NETFILTER_ADVANCED
1299 HL matching allows you to match packets based on the hoplimit
1300 in the IPv6 header, or the time-to-live field in the IPv4
1301 header of the packet.
1303 config NETFILTER_XT_MATCH_IPCOMP
1304 tristate '"ipcomp" match support'
1305 depends on NETFILTER_ADVANCED
1307 This match extension allows you to match a range of CPIs(16 bits)
1308 inside IPComp header of IPSec packets.
1310 To compile it as a module, choose M here. If unsure, say N.
1312 config NETFILTER_XT_MATCH_IPRANGE
1313 tristate '"iprange" address range match support'
1314 depends on NETFILTER_ADVANCED
1316 This option adds a "iprange" match, which allows you to match based on
1317 an IP address range. (Normal iptables only matches on single addresses
1318 with an optional mask.)
1322 config NETFILTER_XT_MATCH_IPVS
1323 tristate '"ipvs" match support'
1325 depends on NETFILTER_ADVANCED
1326 depends on NF_CONNTRACK
1328 This option allows you to match against IPVS properties of a packet.
1332 config NETFILTER_XT_MATCH_L2TP
1333 tristate '"l2tp" match support'
1334 depends on NETFILTER_ADVANCED
1337 This option adds an "L2TP" match, which allows you to match against
1338 L2TP protocol header fields.
1340 To compile it as a module, choose M here. If unsure, say N.
1342 config NETFILTER_XT_MATCH_LENGTH
1343 tristate '"length" match support'
1344 depends on NETFILTER_ADVANCED
1346 This option allows you to match the length of a packet against a
1347 specific value or range of values.
1349 To compile it as a module, choose M here. If unsure, say N.
1351 config NETFILTER_XT_MATCH_LIMIT
1352 tristate '"limit" match support'
1353 depends on NETFILTER_ADVANCED
1355 limit matching allows you to control the rate at which a rule can be
1356 matched: mainly useful in combination with the LOG target ("LOG
1357 target support", below) and to avoid some Denial of Service attacks.
1359 To compile it as a module, choose M here. If unsure, say N.
1361 config NETFILTER_XT_MATCH_MAC
1362 tristate '"mac" address match support'
1363 depends on NETFILTER_ADVANCED
1365 MAC matching allows you to match packets based on the source
1366 Ethernet address of the packet.
1368 To compile it as a module, choose M here. If unsure, say N.
1370 config NETFILTER_XT_MATCH_MARK
1371 tristate '"mark" match support'
1372 depends on NETFILTER_ADVANCED
1373 select NETFILTER_XT_MARK
1375 This is a backwards-compat option for the user's convenience
1376 (e.g. when running oldconfig). It selects
1377 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
1379 config NETFILTER_XT_MATCH_MULTIPORT
1380 tristate '"multiport" Multiple port match support'
1381 depends on NETFILTER_ADVANCED
1383 Multiport matching allows you to match TCP or UDP packets based on
1384 a series of source or destination ports: normally a rule can only
1385 match a single range of ports.
1387 To compile it as a module, choose M here. If unsure, say N.
1389 config NETFILTER_XT_MATCH_NFACCT
1390 tristate '"nfacct" match support'
1391 depends on NETFILTER_ADVANCED
1392 select NETFILTER_NETLINK_ACCT
1394 This option allows you to use the extended accounting through
1397 To compile it as a module, choose M here. If unsure, say N.
1399 config NETFILTER_XT_MATCH_OSF
1400 tristate '"osf" Passive OS fingerprint match'
1401 depends on NETFILTER_ADVANCED
1402 select NETFILTER_NETLINK_OSF
1404 This option selects the Passive OS Fingerprinting match module
1405 that allows to passively match the remote operating system by
1406 analyzing incoming TCP SYN packets.
1408 Rules and loading software can be downloaded from
1409 http://www.ioremap.net/projects/osf
1411 To compile it as a module, choose M here. If unsure, say N.
1413 config NETFILTER_XT_MATCH_OWNER
1414 tristate '"owner" match support'
1415 depends on NETFILTER_ADVANCED
1417 Socket owner matching allows you to match locally-generated packets
1418 based on who created the socket: the user or group. It is also
1419 possible to check whether a socket actually exists.
1421 config NETFILTER_XT_MATCH_POLICY
1422 tristate 'IPsec "policy" match support'
1424 default m if NETFILTER_ADVANCED=n
1426 Policy matching allows you to match packets based on the
1427 IPsec policy that was used during decapsulation/will
1428 be used during encapsulation.
1430 To compile it as a module, choose M here. If unsure, say N.
1432 config NETFILTER_XT_MATCH_PHYSDEV
1433 tristate '"physdev" match support'
1434 depends on BRIDGE && BRIDGE_NETFILTER
1435 depends on NETFILTER_ADVANCED
1437 Physdev packet matching matches against the physical bridge ports
1438 the IP packet arrived on or will leave by.
1440 To compile it as a module, choose M here. If unsure, say N.
1442 config NETFILTER_XT_MATCH_PKTTYPE
1443 tristate '"pkttype" packet type match support'
1444 depends on NETFILTER_ADVANCED
1446 Packet type matching allows you to match a packet by
1447 its "class", eg. BROADCAST, MULTICAST, ...
1450 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
1452 To compile it as a module, choose M here. If unsure, say N.
1454 config NETFILTER_XT_MATCH_QUOTA
1455 tristate '"quota" match support'
1456 depends on NETFILTER_ADVANCED
1458 This option adds a `quota' match, which allows to match on a
1461 If you want to compile it as a module, say M here and read
1462 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1464 config NETFILTER_XT_MATCH_RATEEST
1465 tristate '"rateest" match support'
1466 depends on NETFILTER_ADVANCED
1467 select NETFILTER_XT_TARGET_RATEEST
1469 This option adds a `rateest' match, which allows to match on the
1470 rate estimated by the RATEEST target.
1472 To compile it as a module, choose M here. If unsure, say N.
1474 config NETFILTER_XT_MATCH_REALM
1475 tristate '"realm" match support'
1476 depends on NETFILTER_ADVANCED
1477 select IP_ROUTE_CLASSID
1479 This option adds a `realm' match, which allows you to use the realm
1480 key from the routing subsystem inside iptables.
1482 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
1485 If you want to compile it as a module, say M here and read
1486 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1488 config NETFILTER_XT_MATCH_RECENT
1489 tristate '"recent" match support'
1490 depends on NETFILTER_ADVANCED
1492 This match is used for creating one or many lists of recently
1493 used addresses and then matching against that/those list(s).
1495 Short options are available by using 'iptables -m recent -h'
1496 Official Website: <http://snowman.net/projects/ipt_recent/>
1498 config NETFILTER_XT_MATCH_SCTP
1499 tristate '"sctp" protocol match support'
1500 depends on NETFILTER_ADVANCED
1503 With this option enabled, you will be able to use the
1504 `sctp' match in order to match on SCTP source/destination ports
1505 and SCTP chunk types.
1507 If you want to compile it as a module, say M here and read
1508 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1510 config NETFILTER_XT_MATCH_SOCKET
1511 tristate '"socket" match support'
1512 depends on NETFILTER_XTABLES
1513 depends on NETFILTER_ADVANCED
1514 depends on IPV6 || IPV6=n
1515 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1516 select NF_SOCKET_IPV4
1517 select NF_SOCKET_IPV6 if IP6_NF_IPTABLES
1518 select NF_DEFRAG_IPV4
1519 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES != n
1521 This option adds a `socket' match, which can be used to match
1522 packets for which a TCP or UDP socket lookup finds a valid socket.
1523 It can be used in combination with the MARK target and policy
1524 routing to implement full featured non-locally bound sockets.
1526 To compile it as a module, choose M here. If unsure, say N.
1528 config NETFILTER_XT_MATCH_STATE
1529 tristate '"state" match support'
1530 depends on NF_CONNTRACK
1531 default m if NETFILTER_ADVANCED=n
1533 Connection state matching allows you to match packets based on their
1534 relationship to a tracked connection (ie. previous packets). This
1535 is a powerful tool for packet classification.
1537 To compile it as a module, choose M here. If unsure, say N.
1539 config NETFILTER_XT_MATCH_STATISTIC
1540 tristate '"statistic" match support'
1541 depends on NETFILTER_ADVANCED
1543 This option adds a `statistic' match, which allows you to match
1544 on packets periodically or randomly with a given percentage.
1546 To compile it as a module, choose M here. If unsure, say N.
1548 config NETFILTER_XT_MATCH_STRING
1549 tristate '"string" match support'
1550 depends on NETFILTER_ADVANCED
1552 select TEXTSEARCH_KMP
1553 select TEXTSEARCH_BM
1554 select TEXTSEARCH_FSM
1556 This option adds a `string' match, which allows you to look for
1557 pattern matchings in packets.
1559 To compile it as a module, choose M here. If unsure, say N.
1561 config NETFILTER_XT_MATCH_TCPMSS
1562 tristate '"tcpmss" match support'
1563 depends on NETFILTER_ADVANCED
1565 This option adds a `tcpmss' match, which allows you to examine the
1566 MSS value of TCP SYN packets, which control the maximum packet size
1567 for that connection.
1569 To compile it as a module, choose M here. If unsure, say N.
1571 config NETFILTER_XT_MATCH_TIME
1572 tristate '"time" match support'
1573 depends on NETFILTER_ADVANCED
1575 This option adds a "time" match, which allows you to match based on
1576 the packet arrival time (at the machine which netfilter is running)
1577 on) or departure time/date (for locally generated packets).
1579 If you say Y here, try `iptables -m time --help` for
1582 If you want to compile it as a module, say M here.
1585 config NETFILTER_XT_MATCH_U32
1586 tristate '"u32" match support'
1587 depends on NETFILTER_ADVANCED
1589 u32 allows you to extract quantities of up to 4 bytes from a packet,
1590 AND them with specified masks, shift them by specified amounts and
1591 test whether the results are in any of a set of specified ranges.
1592 The specification of what to extract is general enough to skip over
1593 headers with lengths stored in the packet, as in IP or TCP header
1596 Details and examples are in the kernel module source.
1598 endif # NETFILTER_XTABLES
1602 source "net/netfilter/ipset/Kconfig"
1604 source "net/netfilter/ipvs/Kconfig"