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
50 tristate "Netfilter connection tracking support"
51 default m if NETFILTER_ADVANCED=n
53 Connection tracking keeps a record of what packets have passed
54 through your machine, in order to figure out how they are related
57 This is required to do Masquerading or other kinds of Network
58 Address Translation. It can also be used to enhance packet
59 filtering (see `Connection state match support' below).
61 To compile it as a module, choose M here. If unsure, say N.
67 tristate "Netdev packet logging"
71 config NETFILTER_CONNCOUNT
74 config NF_CONNTRACK_MARK
75 bool 'Connection mark tracking support'
76 depends on NETFILTER_ADVANCED
78 This option enables support for connection marks, used by the
79 `CONNMARK' target and `connmark' match. Similar to the mark value
80 of packets, but this mark value is kept in the conntrack session
81 instead of the individual packets.
83 config NF_CONNTRACK_SECMARK
84 bool 'Connection tracking security mark support'
85 depends on NETWORK_SECMARK
86 default m if NETFILTER_ADVANCED=n
88 This option enables security markings to be applied to
89 connections. Typically they are copied to connections from
90 packets using the CONNSECMARK target and copied back from
91 connections to packets with the same target, with the packets
92 being originally labeled via SECMARK.
96 config NF_CONNTRACK_ZONES
97 bool 'Connection tracking zones'
98 depends on NETFILTER_ADVANCED
99 depends on NETFILTER_XT_TARGET_CT
101 This option enables support for connection tracking zones.
102 Normally, each connection needs to have a unique system wide
103 identity. Connection tracking zones allow to have multiple
104 connections using the same identity, as long as they are
105 contained in different zones.
109 config NF_CONNTRACK_PROCFS
110 bool "Supply CT list in procfs (OBSOLETE)"
114 This option enables for the list of known conntrack entries
115 to be shown in procfs under net/netfilter/nf_conntrack. This
116 is considered obsolete in favor of using the conntrack(8)
117 tool which uses Netlink.
119 config NF_CONNTRACK_EVENTS
120 bool "Connection tracking events"
121 depends on NETFILTER_ADVANCED
123 If this option is enabled, the connection tracking code will
124 provide a notifier chain that can be used by other kernel code
125 to get notified about changes in the connection tracking state.
129 config NF_CONNTRACK_TIMEOUT
130 bool 'Connection tracking timeout'
131 depends on NETFILTER_ADVANCED
133 This option enables support for connection tracking timeout
134 extension. This allows you to attach timeout policies to flow
139 config NF_CONNTRACK_TIMESTAMP
140 bool 'Connection tracking timestamping'
141 depends on NETFILTER_ADVANCED
143 This option enables support for connection tracking timestamping.
144 This allows you to store the flow start-time and to obtain
145 the flow-stop time (once it has been destroyed) via Connection
150 config NF_CONNTRACK_LABELS
153 This option enables support for assigning user-defined flag bits
154 to connection tracking entries. It selected by the connlabel match.
156 config NF_CT_PROTO_DCCP
157 bool 'DCCP protocol connection tracking support'
158 depends on NETFILTER_ADVANCED
161 With this option enabled, the layer 3 independent connection
162 tracking code will be able to do state tracking on DCCP connections.
166 config NF_CT_PROTO_GRE
169 config NF_CT_PROTO_SCTP
170 bool 'SCTP protocol connection tracking support'
171 depends on NETFILTER_ADVANCED
175 With this option enabled, the layer 3 independent connection
176 tracking code will be able to do state tracking on SCTP connections.
180 config NF_CT_PROTO_UDPLITE
181 bool 'UDP-Lite protocol connection tracking support'
182 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 UDP-Lite
191 config NF_CONNTRACK_AMANDA
192 tristate "Amanda backup protocol support"
193 depends on NETFILTER_ADVANCED
195 select TEXTSEARCH_KMP
197 If you are running the Amanda backup package <http://www.amanda.org/>
198 on this machine or machines that will be MASQUERADED through this
199 machine, then you may want to enable this feature. This allows the
200 connection tracking and natting code to allow the sub-channels that
201 Amanda requires for communication of the backup data, messages and
204 To compile it as a module, choose M here. If unsure, say N.
206 config NF_CONNTRACK_FTP
207 tristate "FTP protocol support"
208 default m if NETFILTER_ADVANCED=n
210 Tracking FTP connections is problematic: special helpers are
211 required for tracking them, and doing masquerading and other forms
212 of Network Address Translation on them.
214 This is FTP support on Layer 3 independent connection tracking.
215 Layer 3 independent connection tracking is experimental scheme
216 which generalize ip_conntrack to support other layer 3 protocols.
218 To compile it as a module, choose M here. If unsure, say N.
220 config NF_CONNTRACK_H323
221 tristate "H.323 protocol support"
222 depends on IPV6 || IPV6=n
223 depends on NETFILTER_ADVANCED
225 H.323 is a VoIP signalling protocol from ITU-T. As one of the most
226 important VoIP protocols, it is widely used by voice hardware and
227 software including voice gateways, IP phones, Netmeeting, OpenPhone,
230 With this module you can support H.323 on a connection tracking/NAT
233 This module supports RAS, Fast Start, H.245 Tunnelling, Call
234 Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
235 whiteboard, file transfer, etc. For more information, please
236 visit http://nath323.sourceforge.net/.
238 To compile it as a module, choose M here. If unsure, say N.
240 config NF_CONNTRACK_IRC
241 tristate "IRC protocol support"
242 default m if NETFILTER_ADVANCED=n
244 There is a commonly-used extension to IRC called
245 Direct Client-to-Client Protocol (DCC). This enables users to send
246 files to each other, and also chat to each other without the need
247 of a server. DCC Sending is used anywhere you send files over IRC,
248 and DCC Chat is most commonly used by Eggdrop bots. If you are
249 using NAT, this extension will enable you to send files and initiate
250 chats. Note that you do NOT need this extension to get files or
251 have others initiate chats, or everything else in IRC.
253 To compile it as a module, choose M here. If unsure, say N.
255 config NF_CONNTRACK_BROADCAST
258 config NF_CONNTRACK_NETBIOS_NS
259 tristate "NetBIOS name service protocol support"
260 select NF_CONNTRACK_BROADCAST
262 NetBIOS name service requests are sent as broadcast messages from an
263 unprivileged port and responded to with unicast messages to the
264 same port. This make them hard to firewall properly because connection
265 tracking doesn't deal with broadcasts. This helper tracks locally
266 originating NetBIOS name service requests and the corresponding
267 responses. It relies on correct IP address configuration, specifically
268 netmask and broadcast address. When properly configured, the output
269 of "ip address show" should look similar to this:
271 $ ip -4 address show eth0
272 4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
273 inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
275 To compile it as a module, choose M here. If unsure, say N.
277 config NF_CONNTRACK_SNMP
278 tristate "SNMP service protocol support"
279 depends on NETFILTER_ADVANCED
280 select NF_CONNTRACK_BROADCAST
282 SNMP service requests are sent as broadcast messages from an
283 unprivileged port and responded to with unicast messages to the
284 same port. This make them hard to firewall properly because connection
285 tracking doesn't deal with broadcasts. This helper tracks locally
286 originating SNMP service requests and the corresponding
287 responses. It relies on correct IP address configuration, specifically
288 netmask and broadcast address.
290 To compile it as a module, choose M here. If unsure, say N.
292 config NF_CONNTRACK_PPTP
293 tristate "PPtP protocol support"
294 depends on NETFILTER_ADVANCED
295 select NF_CT_PROTO_GRE
297 This module adds support for PPTP (Point to Point Tunnelling
298 Protocol, RFC2637) connection tracking and NAT.
300 If you are running PPTP sessions over a stateful firewall or NAT
301 box, you may want to enable this feature.
303 Please note that not all PPTP modes of operation are supported yet.
304 Specifically these limitations exist:
305 - Blindly assumes that control connections are always established
306 in PNS->PAC direction. This is a violation of RFC2637.
307 - Only supports a single call within each session
309 To compile it as a module, choose M here. If unsure, say N.
311 config NF_CONNTRACK_SANE
312 tristate "SANE protocol support"
313 depends on NETFILTER_ADVANCED
315 SANE is a protocol for remote access to scanners as implemented
316 by the 'saned' daemon. Like FTP, it uses separate control and
319 With this module you can support SANE on a connection tracking
322 To compile it as a module, choose M here. If unsure, say N.
324 config NF_CONNTRACK_SIP
325 tristate "SIP protocol support"
326 default m if NETFILTER_ADVANCED=n
328 SIP is an application-layer control protocol that can establish,
329 modify, and terminate multimedia sessions (conferences) such as
330 Internet telephony calls. With the ip_conntrack_sip and
331 the nf_nat_sip modules you can support the protocol on a connection
332 tracking/NATing firewall.
334 To compile it as a module, choose M here. If unsure, say N.
336 config NF_CONNTRACK_TFTP
337 tristate "TFTP protocol support"
338 depends on NETFILTER_ADVANCED
340 TFTP connection tracking helper, this is required depending
341 on how restrictive your ruleset is.
342 If you are using a tftp client behind -j SNAT or -j MASQUERADING
345 To compile it as a module, choose M here. If unsure, say N.
348 tristate 'Connection tracking netlink interface'
349 select NETFILTER_NETLINK
350 default m if NETFILTER_ADVANCED=n
352 This option enables support for a netlink-based userspace interface
354 config NF_CT_NETLINK_TIMEOUT
355 tristate 'Connection tracking timeout tuning via Netlink'
356 select NETFILTER_NETLINK
357 depends on NETFILTER_ADVANCED
359 This option enables support for connection tracking timeout
360 fine-grain tuning. This allows you to attach specific timeout
361 policies to flows, instead of using the global timeout policy.
365 config NF_CT_NETLINK_HELPER
366 tristate 'Connection tracking helpers in user-space via Netlink'
367 select NETFILTER_NETLINK
368 depends on NF_CT_NETLINK
369 depends on NETFILTER_NETLINK_QUEUE
370 depends on NETFILTER_NETLINK_GLUE_CT
371 depends on NETFILTER_ADVANCED
373 This option enables the user-space connection tracking helpers
378 config NETFILTER_NETLINK_GLUE_CT
379 bool "NFQUEUE and NFLOG integration with Connection Tracking"
381 depends on (NETFILTER_NETLINK_QUEUE || NETFILTER_NETLINK_LOG) && NF_CT_NETLINK
383 If this option is enabled, NFQUEUE and NFLOG can include
384 Connection Tracking information together with the packet is
385 the enqueued via NFNETLINK.
395 config NF_NAT_PROTO_DCCP
397 depends on NF_NAT && NF_CT_PROTO_DCCP
398 default NF_NAT && NF_CT_PROTO_DCCP
400 config NF_NAT_PROTO_UDPLITE
402 depends on NF_NAT && NF_CT_PROTO_UDPLITE
403 default NF_NAT && NF_CT_PROTO_UDPLITE
405 config NF_NAT_PROTO_SCTP
407 default NF_NAT && NF_CT_PROTO_SCTP
408 depends on NF_NAT && NF_CT_PROTO_SCTP
412 depends on NF_CONNTRACK && NF_NAT
413 default NF_NAT && NF_CONNTRACK_AMANDA
417 depends on NF_CONNTRACK && NF_NAT
418 default NF_NAT && NF_CONNTRACK_FTP
422 depends on NF_CONNTRACK && NF_NAT
423 default NF_NAT && NF_CONNTRACK_IRC
427 depends on NF_CONNTRACK && NF_NAT
428 default NF_NAT && NF_CONNTRACK_SIP
432 depends on NF_CONNTRACK && NF_NAT
433 default NF_NAT && NF_CONNTRACK_TFTP
435 config NF_NAT_REDIRECT
436 tristate "IPv4/IPv6 redirect support"
439 This is the kernel functionality to redirect packets to local
442 config NETFILTER_SYNPROXY
448 select NETFILTER_NETLINK
449 tristate "Netfilter nf_tables support"
451 nftables is the new packet classification framework that intends to
452 replace the existing {ip,ip6,arp,eb}_tables infrastructure. It
453 provides a pseudo-state machine with an extensible instruction-set
454 (also known as expressions) that the userspace 'nft' utility
455 (http://www.netfilter.org/projects/nftables) uses to build the
456 rule-set. It also comes with the generic set infrastructure that
457 allows you to construct mappings between matchings and actions
458 for performance lookups.
460 To compile it as a module, choose M here.
464 config NF_TABLES_INET
466 select NF_TABLES_IPV4
467 select NF_TABLES_IPV6
468 bool "Netfilter nf_tables mixed IPv4/IPv6 tables support"
470 This option enables support for a mixed IPv4/IPv6 "inet" table.
472 config NF_TABLES_NETDEV
473 bool "Netfilter nf_tables netdev tables support"
475 This option enables support for the "netdev" table.
478 tristate "Netfilter nf_tables number generator module"
480 This option adds the number generator expression used to perform
481 incremental counting and random numbers bound to a upper limit.
484 depends on NF_CONNTRACK
485 tristate "Netfilter nf_tables conntrack module"
487 This option adds the "ct" expression that you can use to match
488 connection tracking information such as the flow state.
490 config NFT_FLOW_OFFLOAD
491 depends on NF_CONNTRACK && NF_FLOW_TABLE
492 tristate "Netfilter nf_tables hardware flow offload module"
494 This option adds the "flow_offload" expression that you can use to
495 choose what flows are placed into the hardware.
497 config NFT_SET_RBTREE
498 tristate "Netfilter nf_tables rbtree set module"
500 This option adds the "rbtree" set type (Red Black tree) that is used
501 to build interval-based sets.
504 tristate "Netfilter nf_tables hash set module"
506 This option adds the "hash" set type that is used to build one-way
507 mappings between matchings and actions.
509 config NFT_SET_BITMAP
510 tristate "Netfilter nf_tables bitmap set module"
512 This option adds the "bitmap" set type that is used to build sets
513 whose keys are smaller or equal to 16 bits.
516 tristate "Netfilter nf_tables counter module"
518 This option adds the "counter" expression that you can use to
519 include packet and byte counters in a rule.
522 tristate "Netfilter nf_tables log module"
524 This option adds the "log" expression that you can use to log
525 packets matching some criteria.
528 tristate "Netfilter nf_tables limit module"
530 This option adds the "limit" expression that you can use to
531 ratelimit rule matchings.
534 depends on NF_CONNTRACK
536 tristate "Netfilter nf_tables masquerade support"
538 This option adds the "masquerade" expression that you can use
539 to perform NAT in the masquerade flavour.
542 depends on NF_CONNTRACK
544 tristate "Netfilter nf_tables redirect support"
546 This options adds the "redirect" expression that you can use
547 to perform NAT in the redirect flavour.
550 depends on NF_CONNTRACK
552 tristate "Netfilter nf_tables nat module"
554 This option adds the "nat" expression that you can use to perform
555 typical Network Address Translation (NAT) packet transformations.
558 tristate "Netfilter nf_tables stateful object reference module"
560 This option adds the "objref" expression that allows you to refer to
561 stateful objects, such as counters and quotas.
564 depends on NETFILTER_NETLINK_QUEUE
565 tristate "Netfilter nf_tables queue module"
567 This is required if you intend to use the userspace queueing
568 infrastructure (also known as NFQUEUE) from nftables.
571 tristate "Netfilter nf_tables quota module"
573 This option adds the "quota" expression that you can use to match
574 enforce bytes quotas.
577 default m if NETFILTER_ADVANCED=n
578 tristate "Netfilter nf_tables reject support"
580 This option adds the "reject" expression that you can use to
581 explicitly deny and notify via TCP reset/ICMP informational errors
584 config NFT_REJECT_INET
585 depends on NF_TABLES_INET
590 depends on NETFILTER_XTABLES
591 tristate "Netfilter x_tables over nf_tables module"
593 This is required if you intend to use any of existing
594 x_tables match/target extensions over the nf_tables
598 tristate "Netfilter nf_tables hash module"
600 This option adds the "hash" expression that you can use to perform
601 a hash operation on registers.
607 depends on NF_TABLES_INET
608 depends on NFT_FIB_IPV4
609 depends on NFT_FIB_IPV6
610 tristate "Netfilter nf_tables fib inet support"
612 This option allows using the FIB expression from the inet table.
613 The lookup will be delegated to the IPv4 or IPv6 FIB depending
614 on the protocol of the packet.
619 tristate "Netfilter packet duplication support"
621 This option enables the generic packet duplication infrastructure
624 config NFT_DUP_NETDEV
625 tristate "Netfilter nf_tables netdev packet duplication support"
628 This option enables packet duplication for the "netdev" family.
630 config NFT_FWD_NETDEV
631 tristate "Netfilter nf_tables netdev packet forwarding support"
634 This option enables packet forwarding for the "netdev" family.
636 config NFT_FIB_NETDEV
637 depends on NFT_FIB_IPV4
638 depends on NFT_FIB_IPV6
639 tristate "Netfilter nf_tables netdev fib lookups support"
641 This option allows using the FIB expression from the netdev table.
642 The lookup will be delegated to the IPv4 or IPv6 FIB depending
643 on the protocol of the packet.
645 endif # NF_TABLES_NETDEV
649 config NF_FLOW_TABLE_INET
650 tristate "Netfilter flow table mixed IPv4/IPv6 module"
651 depends on NF_FLOW_TABLE
653 This option adds the flow table mixed IPv4/IPv6 support.
655 To compile it as a module, choose M here.
658 tristate "Netfilter flow table module"
659 depends on NETFILTER_INGRESS
660 depends on NF_CONNTRACK
663 This option adds the flow table core infrastructure.
665 To compile it as a module, choose M here.
667 config NETFILTER_XTABLES
668 tristate "Netfilter Xtables support (required for ip_tables)"
669 default m if NETFILTER_ADVANCED=n
671 This is required if you intend to use any of ip_tables,
672 ip6_tables or arp_tables.
676 comment "Xtables combined modules"
678 config NETFILTER_XT_MARK
679 tristate 'nfmark target and match support'
680 default m if NETFILTER_ADVANCED=n
682 This option adds the "MARK" target and "mark" match.
684 Netfilter mark matching allows you to match packets based on the
685 "nfmark" value in the packet.
686 The target allows you to create rules in the "mangle" table which alter
687 the netfilter mark (nfmark) field associated with the packet.
689 Prior to routing, the nfmark can influence the routing method and can
690 also be used by other subsystems to change their behavior.
692 config NETFILTER_XT_CONNMARK
693 tristate 'ctmark target and match support'
694 depends on NF_CONNTRACK
695 depends on NETFILTER_ADVANCED
696 select NF_CONNTRACK_MARK
698 This option adds the "CONNMARK" target and "connmark" match.
700 Netfilter allows you to store a mark value per connection (a.k.a.
701 ctmark), similarly to the packet mark (nfmark). Using this
702 target and match, you can set and match on this mark.
704 config NETFILTER_XT_SET
705 tristate 'set target and match support'
707 depends on NETFILTER_ADVANCED
709 This option adds the "SET" target and "set" match.
711 Using this target and match, you can add/delete and match
712 elements in the sets created by ipset(8).
714 To compile it as a module, choose M here. If unsure, say N.
716 # alphabetically ordered list of targets
718 comment "Xtables targets"
720 config NETFILTER_XT_TARGET_AUDIT
721 tristate "AUDIT target support"
723 depends on NETFILTER_ADVANCED
725 This option adds a 'AUDIT' target, which can be used to create
726 audit records for packets dropped/accepted.
728 To compileit as a module, choose M here. If unsure, say N.
730 config NETFILTER_XT_TARGET_CHECKSUM
731 tristate "CHECKSUM target support"
732 depends on IP_NF_MANGLE || IP6_NF_MANGLE
733 depends on NETFILTER_ADVANCED
735 This option adds a `CHECKSUM' target, which can be used in the iptables mangle
738 You can use this target to compute and fill in the checksum in
739 a packet that lacks a checksum. This is particularly useful,
740 if you need to work around old applications such as dhcp clients,
741 that do not work well with checksum offloads, but don't want to disable
742 checksum offload in your device.
744 To compile it as a module, choose M here. If unsure, say N.
746 config NETFILTER_XT_TARGET_CLASSIFY
747 tristate '"CLASSIFY" target support'
748 depends on NETFILTER_ADVANCED
750 This option adds a `CLASSIFY' target, which enables the user to set
751 the priority of a packet. Some qdiscs can use this value for
752 classification, among these are:
754 atm, cbq, dsmark, pfifo_fast, htb, prio
756 To compile it as a module, choose M here. If unsure, say N.
758 config NETFILTER_XT_TARGET_CONNMARK
759 tristate '"CONNMARK" target support'
760 depends on NF_CONNTRACK
761 depends on NETFILTER_ADVANCED
762 select NETFILTER_XT_CONNMARK
764 This is a backwards-compat option for the user's convenience
765 (e.g. when running oldconfig). It selects
766 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
768 config NETFILTER_XT_TARGET_CONNSECMARK
769 tristate '"CONNSECMARK" target support'
770 depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
771 default m if NETFILTER_ADVANCED=n
773 The CONNSECMARK target copies security markings from packets
774 to connections, and restores security markings from connections
775 to packets (if the packets are not already marked). This would
776 normally be used in conjunction with the SECMARK target.
778 To compile it as a module, choose M here. If unsure, say N.
780 config NETFILTER_XT_TARGET_CT
781 tristate '"CT" target support'
782 depends on NF_CONNTRACK
783 depends on IP_NF_RAW || IP6_NF_RAW
784 depends on NETFILTER_ADVANCED
786 This options adds a `CT' target, which allows to specify initial
787 connection tracking parameters like events to be delivered and
788 the helper to be used.
790 To compile it as a module, choose M here. If unsure, say N.
792 config NETFILTER_XT_TARGET_DSCP
793 tristate '"DSCP" and "TOS" target support'
794 depends on IP_NF_MANGLE || IP6_NF_MANGLE
795 depends on NETFILTER_ADVANCED
797 This option adds a `DSCP' target, which allows you to manipulate
798 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
800 The DSCP field can have any value between 0x0 and 0x3f inclusive.
802 It also adds the "TOS" target, which allows you to create rules in
803 the "mangle" table which alter the Type Of Service field of an IPv4
804 or the Priority field of an IPv6 packet, prior to routing.
806 To compile it as a module, choose M here. If unsure, say N.
808 config NETFILTER_XT_TARGET_HL
809 tristate '"HL" hoplimit target support'
810 depends on IP_NF_MANGLE || IP6_NF_MANGLE
811 depends on NETFILTER_ADVANCED
813 This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
814 targets, which enable the user to change the
815 hoplimit/time-to-live value of the IP header.
817 While it is safe to decrement the hoplimit/TTL value, the
818 modules also allow to increment and set the hoplimit value of
819 the header to arbitrary values. This is EXTREMELY DANGEROUS
820 since you can easily create immortal packets that loop
821 forever on the network.
823 config NETFILTER_XT_TARGET_HMARK
824 tristate '"HMARK" target support'
825 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
826 depends on NETFILTER_ADVANCED
828 This option adds the "HMARK" target.
830 The target allows you to create rules in the "raw" and "mangle" tables
831 which set the skbuff mark by means of hash calculation within a given
832 range. The nfmark can influence the routing method and can also be used
833 by other subsystems to change their behaviour.
835 To compile it as a module, choose M here. If unsure, say N.
837 config NETFILTER_XT_TARGET_IDLETIMER
838 tristate "IDLETIMER target support"
839 depends on NETFILTER_ADVANCED
842 This option adds the `IDLETIMER' target. Each matching packet
843 resets the timer associated with label specified when the rule is
844 added. When the timer expires, it triggers a sysfs notification.
845 The remaining time for expiration can be read via sysfs.
847 To compile it as a module, choose M here. If unsure, say N.
849 config NETFILTER_XT_TARGET_LED
850 tristate '"LED" target support'
851 depends on LEDS_CLASS && LEDS_TRIGGERS
852 depends on NETFILTER_ADVANCED
854 This option adds a `LED' target, which allows you to blink LEDs in
855 response to particular packets passing through your machine.
857 This can be used to turn a spare LED into a network activity LED,
858 which only flashes in response to FTP transfers, for example. Or
859 you could have an LED which lights up for a minute or two every time
860 somebody connects to your machine via SSH.
862 You will need support for the "led" class to make this work.
864 To create an LED trigger for incoming SSH traffic:
865 iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
867 Then attach the new trigger to an LED on your system:
868 echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
870 For more information on the LEDs available on your system, see
871 Documentation/leds/leds-class.txt
873 config NETFILTER_XT_TARGET_LOG
874 tristate "LOG target support"
877 select NF_LOG_IPV6 if IPV6
878 default m if NETFILTER_ADVANCED=n
880 This option adds a `LOG' target, which allows you to create rules in
881 any iptables table which records the packet header to the syslog.
883 To compile it as a module, choose M here. If unsure, say N.
885 config NETFILTER_XT_TARGET_MARK
886 tristate '"MARK" target support'
887 depends on NETFILTER_ADVANCED
888 select NETFILTER_XT_MARK
890 This is a backwards-compat option for the user's convenience
891 (e.g. when running oldconfig). It selects
892 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
894 config NETFILTER_XT_NAT
895 tristate '"SNAT and DNAT" targets support'
898 This option enables the SNAT and DNAT targets.
900 To compile it as a module, choose M here. If unsure, say N.
902 config NETFILTER_XT_TARGET_NETMAP
903 tristate '"NETMAP" target support'
906 NETMAP is an implementation of static 1:1 NAT mapping of network
907 addresses. It maps the network address part, while keeping the host
910 To compile it as a module, choose M here. If unsure, say N.
912 config NETFILTER_XT_TARGET_NFLOG
913 tristate '"NFLOG" target support'
914 default m if NETFILTER_ADVANCED=n
915 select NETFILTER_NETLINK_LOG
917 This option enables the NFLOG target, which allows to LOG
918 messages through nfnetlink_log.
920 To compile it as a module, choose M here. If unsure, say N.
922 config NETFILTER_XT_TARGET_NFQUEUE
923 tristate '"NFQUEUE" target Support'
924 depends on NETFILTER_ADVANCED
925 select NETFILTER_NETLINK_QUEUE
927 This target replaced the old obsolete QUEUE target.
929 As opposed to QUEUE, it supports 65535 different queues,
932 To compile it as a module, choose M here. If unsure, say N.
934 config NETFILTER_XT_TARGET_NOTRACK
935 tristate '"NOTRACK" target support (DEPRECATED)'
936 depends on NF_CONNTRACK
937 depends on IP_NF_RAW || IP6_NF_RAW
938 depends on NETFILTER_ADVANCED
939 select NETFILTER_XT_TARGET_CT
941 config NETFILTER_XT_TARGET_RATEEST
942 tristate '"RATEEST" target support'
943 depends on NETFILTER_ADVANCED
945 This option adds a `RATEEST' target, which allows to measure
946 rates similar to TC estimators. The `rateest' match can be
947 used to match on the measured rates.
949 To compile it as a module, choose M here. If unsure, say N.
951 config NETFILTER_XT_TARGET_REDIRECT
952 tristate "REDIRECT target support"
954 select NF_NAT_REDIRECT
956 REDIRECT is a special case of NAT: all incoming connections are
957 mapped onto the incoming interface's address, causing the packets to
958 come to the local machine instead of passing through. This is
959 useful for transparent proxies.
961 To compile it as a module, choose M here. If unsure, say N.
963 config NETFILTER_XT_TARGET_TEE
964 tristate '"TEE" - packet cloning to alternate destination'
965 depends on NETFILTER_ADVANCED
966 depends on IPV6 || IPV6=n
967 depends on !NF_CONNTRACK || NF_CONNTRACK
969 select NF_DUP_IPV6 if IPV6
971 This option adds a "TEE" target with which a packet can be cloned and
972 this clone be rerouted to another nexthop.
974 config NETFILTER_XT_TARGET_TPROXY
975 tristate '"TPROXY" target transparent proxying support'
976 depends on NETFILTER_XTABLES
977 depends on NETFILTER_ADVANCED
978 depends on IPV6 || IPV6=n
979 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
980 depends on IP_NF_MANGLE
981 select NF_DEFRAG_IPV4
982 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES != n
984 This option adds a `TPROXY' target, which is somewhat similar to
985 REDIRECT. It can only be used in the mangle table and is useful
986 to redirect traffic to a transparent proxy. It does _not_ depend
987 on Netfilter connection tracking and NAT, unlike REDIRECT.
988 For it to work you will have to configure certain iptables rules
989 and use policy routing. For more information on how to set it up
990 see Documentation/networking/tproxy.txt.
992 To compile it as a module, choose M here. If unsure, say N.
994 config NETFILTER_XT_TARGET_TRACE
995 tristate '"TRACE" target support'
996 depends on IP_NF_RAW || IP6_NF_RAW
997 depends on NETFILTER_ADVANCED
999 The TRACE target allows you to mark packets so that the kernel
1000 will log every rule which match the packets as those traverse
1001 the tables, chains, rules.
1003 If you want to compile it as a module, say M here and read
1004 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1006 config NETFILTER_XT_TARGET_SECMARK
1007 tristate '"SECMARK" target support'
1008 depends on NETWORK_SECMARK
1009 default m if NETFILTER_ADVANCED=n
1011 The SECMARK target allows security marking of network
1012 packets, for use with security subsystems.
1014 To compile it as a module, choose M here. If unsure, say N.
1016 config NETFILTER_XT_TARGET_TCPMSS
1017 tristate '"TCPMSS" target support'
1018 depends on IPV6 || IPV6=n
1019 default m if NETFILTER_ADVANCED=n
1021 This option adds a `TCPMSS' target, which allows you to alter the
1022 MSS value of TCP SYN packets, to control the maximum size for that
1023 connection (usually limiting it to your outgoing interface's MTU
1026 This is used to overcome criminally braindead ISPs or servers which
1027 block ICMP Fragmentation Needed packets. The symptoms of this
1028 problem are that everything works fine from your Linux
1029 firewall/router, but machines behind it can never exchange large
1031 1) Web browsers connect, then hang with no data received.
1032 2) Small mail works fine, but large emails hang.
1033 3) ssh works fine, but scp hangs after initial handshaking.
1035 Workaround: activate this option and add a rule to your firewall
1038 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
1039 -j TCPMSS --clamp-mss-to-pmtu
1041 To compile it as a module, choose M here. If unsure, say N.
1043 config NETFILTER_XT_TARGET_TCPOPTSTRIP
1044 tristate '"TCPOPTSTRIP" target support'
1045 depends on IP_NF_MANGLE || IP6_NF_MANGLE
1046 depends on NETFILTER_ADVANCED
1048 This option adds a "TCPOPTSTRIP" target, which allows you to strip
1049 TCP options from TCP packets.
1051 # alphabetically ordered list of matches
1053 comment "Xtables matches"
1055 config NETFILTER_XT_MATCH_ADDRTYPE
1056 tristate '"addrtype" address type match support'
1057 default m if NETFILTER_ADVANCED=n
1059 This option allows you to match what routing thinks of an address,
1060 eg. UNICAST, LOCAL, BROADCAST, ...
1062 If you want to compile it as a module, say M here and read
1063 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1065 config NETFILTER_XT_MATCH_BPF
1066 tristate '"bpf" match support'
1067 depends on NETFILTER_ADVANCED
1069 BPF matching applies a linux socket filter to each packet and
1070 accepts those for which the filter returns non-zero.
1072 To compile it as a module, choose M here. If unsure, say N.
1074 config NETFILTER_XT_MATCH_CGROUP
1075 tristate '"control group" match support'
1076 depends on NETFILTER_ADVANCED
1078 select CGROUP_NET_CLASSID
1080 Socket/process control group matching allows you to match locally
1081 generated packets based on which net_cls control group processes
1084 config NETFILTER_XT_MATCH_CLUSTER
1085 tristate '"cluster" match support'
1086 depends on NF_CONNTRACK
1087 depends on NETFILTER_ADVANCED
1089 This option allows you to build work-load-sharing clusters of
1090 network servers/stateful firewalls without having a dedicated
1091 load-balancing router/server/switch. Basically, this match returns
1092 true when the packet must be handled by this cluster node. Thus,
1093 all nodes see all packets and this match decides which node handles
1094 what packets. The work-load sharing algorithm is based on source
1097 If you say Y or M here, try `iptables -m cluster --help` for
1100 config NETFILTER_XT_MATCH_COMMENT
1101 tristate '"comment" match support'
1102 depends on NETFILTER_ADVANCED
1104 This option adds a `comment' dummy-match, which allows you to put
1105 comments in your iptables ruleset.
1107 If you want to compile it as a module, say M here and read
1108 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1110 config NETFILTER_XT_MATCH_CONNBYTES
1111 tristate '"connbytes" per-connection counter match support'
1112 depends on NF_CONNTRACK
1113 depends on NETFILTER_ADVANCED
1115 This option adds a `connbytes' match, which allows you to match the
1116 number of bytes and/or packets for each direction within a connection.
1118 If you want to compile it as a module, say M here and read
1119 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1121 config NETFILTER_XT_MATCH_CONNLABEL
1122 tristate '"connlabel" match support'
1123 select NF_CONNTRACK_LABELS
1124 depends on NF_CONNTRACK
1125 depends on NETFILTER_ADVANCED
1127 This match allows you to test and assign userspace-defined labels names
1128 to a connection. The kernel only stores bit values - mapping
1129 names to bits is done by userspace.
1131 Unlike connmark, more than 32 flag bits may be assigned to a
1132 connection simultaneously.
1134 config NETFILTER_XT_MATCH_CONNLIMIT
1135 tristate '"connlimit" match support'
1136 depends on NF_CONNTRACK
1137 depends on NETFILTER_ADVANCED
1138 select NETFILTER_CONNCOUNT
1140 This match allows you to match against the number of parallel
1141 connections to a server per client IP address (or address block).
1143 config NETFILTER_XT_MATCH_CONNMARK
1144 tristate '"connmark" connection mark match support'
1145 depends on NF_CONNTRACK
1146 depends on NETFILTER_ADVANCED
1147 select NETFILTER_XT_CONNMARK
1149 This is a backwards-compat option for the user's convenience
1150 (e.g. when running oldconfig). It selects
1151 CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
1153 config NETFILTER_XT_MATCH_CONNTRACK
1154 tristate '"conntrack" connection tracking match support'
1155 depends on NF_CONNTRACK
1156 default m if NETFILTER_ADVANCED=n
1158 This is a general conntrack match module, a superset of the state match.
1160 It allows matching on additional conntrack information, which is
1161 useful in complex configurations, such as NAT gateways with multiple
1162 internet links or tunnels.
1164 To compile it as a module, choose M here. If unsure, say N.
1166 config NETFILTER_XT_MATCH_CPU
1167 tristate '"cpu" match support'
1168 depends on NETFILTER_ADVANCED
1170 CPU matching allows you to match packets based on the CPU
1171 currently handling the packet.
1173 To compile it as a module, choose M here. If unsure, say N.
1175 config NETFILTER_XT_MATCH_DCCP
1176 tristate '"dccp" protocol match support'
1177 depends on NETFILTER_ADVANCED
1180 With this option enabled, you will be able to use the iptables
1181 `dccp' match in order to match on DCCP source/destination ports
1184 If you want to compile it as a module, say M here and read
1185 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1187 config NETFILTER_XT_MATCH_DEVGROUP
1188 tristate '"devgroup" match support'
1189 depends on NETFILTER_ADVANCED
1191 This options adds a `devgroup' match, which allows to match on the
1192 device group a network device is assigned to.
1194 To compile it as a module, choose M here. If unsure, say N.
1196 config NETFILTER_XT_MATCH_DSCP
1197 tristate '"dscp" and "tos" match support'
1198 depends on NETFILTER_ADVANCED
1200 This option adds a `DSCP' match, which allows you to match against
1201 the IPv4/IPv6 header DSCP field (differentiated services codepoint).
1203 The DSCP field can have any value between 0x0 and 0x3f inclusive.
1205 It will also add a "tos" match, which allows you to match packets
1206 based on the Type Of Service fields of the IPv4 packet (which share
1207 the same bits as DSCP).
1209 To compile it as a module, choose M here. If unsure, say N.
1211 config NETFILTER_XT_MATCH_ECN
1212 tristate '"ecn" match support'
1213 depends on NETFILTER_ADVANCED
1215 This option adds an "ECN" match, which allows you to match against
1216 the IPv4 and TCP header ECN fields.
1218 To compile it as a module, choose M here. If unsure, say N.
1220 config NETFILTER_XT_MATCH_ESP
1221 tristate '"esp" match support'
1222 depends on NETFILTER_ADVANCED
1224 This match extension allows you to match a range of SPIs
1225 inside ESP header of IPSec packets.
1227 To compile it as a module, choose M here. If unsure, say N.
1229 config NETFILTER_XT_MATCH_HASHLIMIT
1230 tristate '"hashlimit" match support'
1231 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1232 depends on NETFILTER_ADVANCED
1234 This option adds a `hashlimit' match.
1236 As opposed to `limit', this match dynamically creates a hash table
1237 of limit buckets, based on your selection of source/destination
1238 addresses and/or ports.
1240 It enables you to express policies like `10kpps for any given
1241 destination address' or `500pps from any given source address'
1244 config NETFILTER_XT_MATCH_HELPER
1245 tristate '"helper" match support'
1246 depends on NF_CONNTRACK
1247 depends on NETFILTER_ADVANCED
1249 Helper matching allows you to match packets in dynamic connections
1250 tracked by a conntrack-helper, ie. ip_conntrack_ftp
1252 To compile it as a module, choose M here. If unsure, say Y.
1254 config NETFILTER_XT_MATCH_HL
1255 tristate '"hl" hoplimit/TTL match support'
1256 depends on NETFILTER_ADVANCED
1258 HL matching allows you to match packets based on the hoplimit
1259 in the IPv6 header, or the time-to-live field in the IPv4
1260 header of the packet.
1262 config NETFILTER_XT_MATCH_IPCOMP
1263 tristate '"ipcomp" match support'
1264 depends on NETFILTER_ADVANCED
1266 This match extension allows you to match a range of CPIs(16 bits)
1267 inside IPComp header of IPSec packets.
1269 To compile it as a module, choose M here. If unsure, say N.
1271 config NETFILTER_XT_MATCH_IPRANGE
1272 tristate '"iprange" address range match support'
1273 depends on NETFILTER_ADVANCED
1275 This option adds a "iprange" match, which allows you to match based on
1276 an IP address range. (Normal iptables only matches on single addresses
1277 with an optional mask.)
1281 config NETFILTER_XT_MATCH_IPVS
1282 tristate '"ipvs" match support'
1284 depends on NETFILTER_ADVANCED
1285 depends on NF_CONNTRACK
1287 This option allows you to match against IPVS properties of a packet.
1291 config NETFILTER_XT_MATCH_L2TP
1292 tristate '"l2tp" match support'
1293 depends on NETFILTER_ADVANCED
1296 This option adds an "L2TP" match, which allows you to match against
1297 L2TP protocol header fields.
1299 To compile it as a module, choose M here. If unsure, say N.
1301 config NETFILTER_XT_MATCH_LENGTH
1302 tristate '"length" match support'
1303 depends on NETFILTER_ADVANCED
1305 This option allows you to match the length of a packet against a
1306 specific value or range of values.
1308 To compile it as a module, choose M here. If unsure, say N.
1310 config NETFILTER_XT_MATCH_LIMIT
1311 tristate '"limit" match support'
1312 depends on NETFILTER_ADVANCED
1314 limit matching allows you to control the rate at which a rule can be
1315 matched: mainly useful in combination with the LOG target ("LOG
1316 target support", below) and to avoid some Denial of Service attacks.
1318 To compile it as a module, choose M here. If unsure, say N.
1320 config NETFILTER_XT_MATCH_MAC
1321 tristate '"mac" address match support'
1322 depends on NETFILTER_ADVANCED
1324 MAC matching allows you to match packets based on the source
1325 Ethernet address of the packet.
1327 To compile it as a module, choose M here. If unsure, say N.
1329 config NETFILTER_XT_MATCH_MARK
1330 tristate '"mark" match support'
1331 depends on NETFILTER_ADVANCED
1332 select NETFILTER_XT_MARK
1334 This is a backwards-compat option for the user's convenience
1335 (e.g. when running oldconfig). It selects
1336 CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
1338 config NETFILTER_XT_MATCH_MULTIPORT
1339 tristate '"multiport" Multiple port match support'
1340 depends on NETFILTER_ADVANCED
1342 Multiport matching allows you to match TCP or UDP packets based on
1343 a series of source or destination ports: normally a rule can only
1344 match a single range of ports.
1346 To compile it as a module, choose M here. If unsure, say N.
1348 config NETFILTER_XT_MATCH_NFACCT
1349 tristate '"nfacct" match support'
1350 depends on NETFILTER_ADVANCED
1351 select NETFILTER_NETLINK_ACCT
1353 This option allows you to use the extended accounting through
1356 To compile it as a module, choose M here. If unsure, say N.
1358 config NETFILTER_XT_MATCH_OSF
1359 tristate '"osf" Passive OS fingerprint match'
1360 depends on NETFILTER_ADVANCED && NETFILTER_NETLINK
1362 This option selects the Passive OS Fingerprinting match module
1363 that allows to passively match the remote operating system by
1364 analyzing incoming TCP SYN packets.
1366 Rules and loading software can be downloaded from
1367 http://www.ioremap.net/projects/osf
1369 To compile it as a module, choose M here. If unsure, say N.
1371 config NETFILTER_XT_MATCH_OWNER
1372 tristate '"owner" match support'
1373 depends on NETFILTER_ADVANCED
1375 Socket owner matching allows you to match locally-generated packets
1376 based on who created the socket: the user or group. It is also
1377 possible to check whether a socket actually exists.
1379 config NETFILTER_XT_MATCH_POLICY
1380 tristate 'IPsec "policy" match support'
1382 default m if NETFILTER_ADVANCED=n
1384 Policy matching allows you to match packets based on the
1385 IPsec policy that was used during decapsulation/will
1386 be used during encapsulation.
1388 To compile it as a module, choose M here. If unsure, say N.
1390 config NETFILTER_XT_MATCH_PHYSDEV
1391 tristate '"physdev" match support'
1392 depends on BRIDGE && BRIDGE_NETFILTER
1393 depends on NETFILTER_ADVANCED
1395 Physdev packet matching matches against the physical bridge ports
1396 the IP packet arrived on or will leave by.
1398 To compile it as a module, choose M here. If unsure, say N.
1400 config NETFILTER_XT_MATCH_PKTTYPE
1401 tristate '"pkttype" packet type match support'
1402 depends on NETFILTER_ADVANCED
1404 Packet type matching allows you to match a packet by
1405 its "class", eg. BROADCAST, MULTICAST, ...
1408 iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG
1410 To compile it as a module, choose M here. If unsure, say N.
1412 config NETFILTER_XT_MATCH_QUOTA
1413 tristate '"quota" match support'
1414 depends on NETFILTER_ADVANCED
1416 This option adds a `quota' match, which allows to match on a
1419 If you want to compile it as a module, say M here and read
1420 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1422 config NETFILTER_XT_MATCH_RATEEST
1423 tristate '"rateest" match support'
1424 depends on NETFILTER_ADVANCED
1425 select NETFILTER_XT_TARGET_RATEEST
1427 This option adds a `rateest' match, which allows to match on the
1428 rate estimated by the RATEEST target.
1430 To compile it as a module, choose M here. If unsure, say N.
1432 config NETFILTER_XT_MATCH_REALM
1433 tristate '"realm" match support'
1434 depends on NETFILTER_ADVANCED
1435 select IP_ROUTE_CLASSID
1437 This option adds a `realm' match, which allows you to use the realm
1438 key from the routing subsystem inside iptables.
1440 This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option
1443 If you want to compile it as a module, say M here and read
1444 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1446 config NETFILTER_XT_MATCH_RECENT
1447 tristate '"recent" match support'
1448 depends on NETFILTER_ADVANCED
1450 This match is used for creating one or many lists of recently
1451 used addresses and then matching against that/those list(s).
1453 Short options are available by using 'iptables -m recent -h'
1454 Official Website: <http://snowman.net/projects/ipt_recent/>
1456 config NETFILTER_XT_MATCH_SCTP
1457 tristate '"sctp" protocol match support'
1458 depends on NETFILTER_ADVANCED
1461 With this option enabled, you will be able to use the
1462 `sctp' match in order to match on SCTP source/destination ports
1463 and SCTP chunk types.
1465 If you want to compile it as a module, say M here and read
1466 <file:Documentation/kbuild/modules.txt>. If unsure, say `N'.
1468 config NETFILTER_XT_MATCH_SOCKET
1469 tristate '"socket" match support'
1470 depends on NETFILTER_XTABLES
1471 depends on NETFILTER_ADVANCED
1472 depends on IPV6 || IPV6=n
1473 depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
1474 depends on NF_SOCKET_IPV4
1475 depends on NF_SOCKET_IPV6
1476 select NF_DEFRAG_IPV4
1477 select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES != n
1479 This option adds a `socket' match, which can be used to match
1480 packets for which a TCP or UDP socket lookup finds a valid socket.
1481 It can be used in combination with the MARK target and policy
1482 routing to implement full featured non-locally bound sockets.
1484 To compile it as a module, choose M here. If unsure, say N.
1486 config NETFILTER_XT_MATCH_STATE
1487 tristate '"state" match support'
1488 depends on NF_CONNTRACK
1489 default m if NETFILTER_ADVANCED=n
1491 Connection state matching allows you to match packets based on their
1492 relationship to a tracked connection (ie. previous packets). This
1493 is a powerful tool for packet classification.
1495 To compile it as a module, choose M here. If unsure, say N.
1497 config NETFILTER_XT_MATCH_STATISTIC
1498 tristate '"statistic" match support'
1499 depends on NETFILTER_ADVANCED
1501 This option adds a `statistic' match, which allows you to match
1502 on packets periodically or randomly with a given percentage.
1504 To compile it as a module, choose M here. If unsure, say N.
1506 config NETFILTER_XT_MATCH_STRING
1507 tristate '"string" match support'
1508 depends on NETFILTER_ADVANCED
1510 select TEXTSEARCH_KMP
1511 select TEXTSEARCH_BM
1512 select TEXTSEARCH_FSM
1514 This option adds a `string' match, which allows you to look for
1515 pattern matchings in packets.
1517 To compile it as a module, choose M here. If unsure, say N.
1519 config NETFILTER_XT_MATCH_TCPMSS
1520 tristate '"tcpmss" match support'
1521 depends on NETFILTER_ADVANCED
1523 This option adds a `tcpmss' match, which allows you to examine the
1524 MSS value of TCP SYN packets, which control the maximum packet size
1525 for that connection.
1527 To compile it as a module, choose M here. If unsure, say N.
1529 config NETFILTER_XT_MATCH_TIME
1530 tristate '"time" match support'
1531 depends on NETFILTER_ADVANCED
1533 This option adds a "time" match, which allows you to match based on
1534 the packet arrival time (at the machine which netfilter is running)
1535 on) or departure time/date (for locally generated packets).
1537 If you say Y here, try `iptables -m time --help` for
1540 If you want to compile it as a module, say M here.
1543 config NETFILTER_XT_MATCH_U32
1544 tristate '"u32" match support'
1545 depends on NETFILTER_ADVANCED
1547 u32 allows you to extract quantities of up to 4 bytes from a packet,
1548 AND them with specified masks, shift them by specified amounts and
1549 test whether the results are in any of a set of specified ranges.
1550 The specification of what to extract is general enough to skip over
1551 headers with lengths stored in the packet, as in IP or TCP header
1554 Details and examples are in the kernel module source.
1556 endif # NETFILTER_XTABLES
1560 source "net/netfilter/ipset/Kconfig"
1562 source "net/netfilter/ipvs/Kconfig"