forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 17
/
Kconfig
1620 lines (1325 loc) · 51.9 KB
/
Kconfig
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# SPDX-License-Identifier: GPL-2.0-only
menu "Core Netfilter Configuration"
depends on NET && INET && NETFILTER
config NETFILTER_INGRESS
bool "Netfilter ingress support"
default y
select NET_INGRESS
help
This allows you to classify packets from ingress using the Netfilter
infrastructure.
config NETFILTER_NETLINK
tristate
config NETFILTER_FAMILY_BRIDGE
bool
config NETFILTER_FAMILY_ARP
bool
config NETFILTER_NETLINK_ACCT
tristate "Netfilter NFACCT over NFNETLINK interface"
depends on NETFILTER_ADVANCED
select NETFILTER_NETLINK
help
If this option is enabled, the kernel will include support
for extended accounting via NFNETLINK.
config NETFILTER_NETLINK_QUEUE
tristate "Netfilter NFQUEUE over NFNETLINK interface"
depends on NETFILTER_ADVANCED
select NETFILTER_NETLINK
help
If this option is enabled, the kernel will include support
for queueing packets via NFNETLINK.
config NETFILTER_NETLINK_LOG
tristate "Netfilter LOG over NFNETLINK interface"
default m if NETFILTER_ADVANCED=n
select NETFILTER_NETLINK
help
If this option is enabled, the kernel will include support
for logging packets via NFNETLINK.
This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
and is also scheduled to replace the old syslog-based ipt_LOG
and ip6t_LOG modules.
config NETFILTER_NETLINK_OSF
tristate "Netfilter OSF over NFNETLINK interface"
depends on NETFILTER_ADVANCED
select NETFILTER_NETLINK
help
If this option is enabled, the kernel will include support
for passive OS fingerprint via NFNETLINK.
config NF_CONNTRACK
tristate "Netfilter connection tracking support"
default m if NETFILTER_ADVANCED=n
select NF_DEFRAG_IPV4
select NF_DEFRAG_IPV6 if IPV6 != n
help
Connection tracking keeps a record of what packets have passed
through your machine, in order to figure out how they are related
into connections.
This is required to do Masquerading or other kinds of Network
Address Translation. It can also be used to enhance packet
filtering (see `Connection state match support' below).
To compile it as a module, choose M here. If unsure, say N.
config NF_LOG_COMMON
tristate
config NF_LOG_NETDEV
tristate "Netdev packet logging"
select NF_LOG_COMMON
if NF_CONNTRACK
config NETFILTER_CONNCOUNT
tristate
config NF_CONNTRACK_MARK
bool 'Connection mark tracking support'
depends on NETFILTER_ADVANCED
help
This option enables support for connection marks, used by the
`CONNMARK' target and `connmark' match. Similar to the mark value
of packets, but this mark value is kept in the conntrack session
instead of the individual packets.
config NF_CONNTRACK_SECMARK
bool 'Connection tracking security mark support'
depends on NETWORK_SECMARK
default m if NETFILTER_ADVANCED=n
help
This option enables security markings to be applied to
connections. Typically they are copied to connections from
packets using the CONNSECMARK target and copied back from
connections to packets with the same target, with the packets
being originally labeled via SECMARK.
If unsure, say 'N'.
config NF_CONNTRACK_ZONES
bool 'Connection tracking zones'
depends on NETFILTER_ADVANCED
help
This option enables support for connection tracking zones.
Normally, each connection needs to have a unique system wide
identity. Connection tracking zones allow to have multiple
connections using the same identity, as long as they are
contained in different zones.
If unsure, say `N'.
config NF_CONNTRACK_PROCFS
bool "Supply CT list in procfs (OBSOLETE)"
default y
depends on PROC_FS
help
This option enables for the list of known conntrack entries
to be shown in procfs under net/netfilter/nf_conntrack. This
is considered obsolete in favor of using the conntrack(8)
tool which uses Netlink.
config NF_CONNTRACK_EVENTS
bool "Connection tracking events"
depends on NETFILTER_ADVANCED
help
If this option is enabled, the connection tracking code will
provide a notifier chain that can be used by other kernel code
to get notified about changes in the connection tracking state.
If unsure, say `N'.
config NF_CONNTRACK_TIMEOUT
bool 'Connection tracking timeout'
depends on NETFILTER_ADVANCED
help
This option enables support for connection tracking timeout
extension. This allows you to attach timeout policies to flow
via the CT target.
If unsure, say `N'.
config NF_CONNTRACK_TIMESTAMP
bool 'Connection tracking timestamping'
depends on NETFILTER_ADVANCED
help
This option enables support for connection tracking timestamping.
This allows you to store the flow start-time and to obtain
the flow-stop time (once it has been destroyed) via Connection
tracking events.
If unsure, say `N'.
config NF_CONNTRACK_LABELS
bool "Connection tracking labels"
help
This option enables support for assigning user-defined flag bits
to connection tracking entries. It can be used with xtables connlabel
match and the nftables ct expression.
config NF_CT_PROTO_DCCP
bool 'DCCP protocol connection tracking support'
depends on NETFILTER_ADVANCED
default y
help
With this option enabled, the layer 3 independent connection
tracking code will be able to do state tracking on DCCP connections.
If unsure, say Y.
config NF_CT_PROTO_GRE
bool
config NF_CT_PROTO_SCTP
bool 'SCTP protocol connection tracking support'
depends on NETFILTER_ADVANCED
default y
select LIBCRC32C
help
With this option enabled, the layer 3 independent connection
tracking code will be able to do state tracking on SCTP connections.
If unsure, say Y.
config NF_CT_PROTO_UDPLITE
bool 'UDP-Lite protocol connection tracking support'
depends on NETFILTER_ADVANCED
default y
help
With this option enabled, the layer 3 independent connection
tracking code will be able to do state tracking on UDP-Lite
connections.
If unsure, say Y.
config NF_CONNTRACK_AMANDA
tristate "Amanda backup protocol support"
depends on NETFILTER_ADVANCED
select TEXTSEARCH
select TEXTSEARCH_KMP
help
If you are running the Amanda backup package <http://www.amanda.org/>
on this machine or machines that will be MASQUERADED through this
machine, then you may want to enable this feature. This allows the
connection tracking and natting code to allow the sub-channels that
Amanda requires for communication of the backup data, messages and
index.
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_FTP
tristate "FTP protocol support"
default m if NETFILTER_ADVANCED=n
help
Tracking FTP connections is problematic: special helpers are
required for tracking them, and doing masquerading and other forms
of Network Address Translation on them.
This is FTP support on Layer 3 independent connection tracking.
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_H323
tristate "H.323 protocol support"
depends on IPV6 || IPV6=n
depends on NETFILTER_ADVANCED
help
H.323 is a VoIP signalling protocol from ITU-T. As one of the most
important VoIP protocols, it is widely used by voice hardware and
software including voice gateways, IP phones, Netmeeting, OpenPhone,
Gnomemeeting, etc.
With this module you can support H.323 on a connection tracking/NAT
firewall.
This module supports RAS, Fast Start, H.245 Tunnelling, Call
Forwarding, RTP/RTCP and T.120 based audio, video, fax, chat,
whiteboard, file transfer, etc. For more information, please
visit http://nath323.sourceforge.net/.
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_IRC
tristate "IRC protocol support"
default m if NETFILTER_ADVANCED=n
help
There is a commonly-used extension to IRC called
Direct Client-to-Client Protocol (DCC). This enables users to send
files to each other, and also chat to each other without the need
of a server. DCC Sending is used anywhere you send files over IRC,
and DCC Chat is most commonly used by Eggdrop bots. If you are
using NAT, this extension will enable you to send files and initiate
chats. Note that you do NOT need this extension to get files or
have others initiate chats, or everything else in IRC.
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_BROADCAST
tristate
config NF_CONNTRACK_NETBIOS_NS
tristate "NetBIOS name service protocol support"
select NF_CONNTRACK_BROADCAST
help
NetBIOS name service requests are sent as broadcast messages from an
unprivileged port and responded to with unicast messages to the
same port. This make them hard to firewall properly because connection
tracking doesn't deal with broadcasts. This helper tracks locally
originating NetBIOS name service requests and the corresponding
responses. It relies on correct IP address configuration, specifically
netmask and broadcast address. When properly configured, the output
of "ip address show" should look similar to this:
$ ip -4 address show eth0
4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
inet 172.16.2.252/24 brd 172.16.2.255 scope global eth0
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_SNMP
tristate "SNMP service protocol support"
depends on NETFILTER_ADVANCED
select NF_CONNTRACK_BROADCAST
help
SNMP service requests are sent as broadcast messages from an
unprivileged port and responded to with unicast messages to the
same port. This make them hard to firewall properly because connection
tracking doesn't deal with broadcasts. This helper tracks locally
originating SNMP service requests and the corresponding
responses. It relies on correct IP address configuration, specifically
netmask and broadcast address.
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_PPTP
tristate "PPtP protocol support"
depends on NETFILTER_ADVANCED
select NF_CT_PROTO_GRE
help
This module adds support for PPTP (Point to Point Tunnelling
Protocol, RFC2637) connection tracking and NAT.
If you are running PPTP sessions over a stateful firewall or NAT
box, you may want to enable this feature.
Please note that not all PPTP modes of operation are supported yet.
Specifically these limitations exist:
- Blindly assumes that control connections are always established
in PNS->PAC direction. This is a violation of RFC2637.
- Only supports a single call within each session
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_SANE
tristate "SANE protocol support"
depends on NETFILTER_ADVANCED
help
SANE is a protocol for remote access to scanners as implemented
by the 'saned' daemon. Like FTP, it uses separate control and
data connections.
With this module you can support SANE on a connection tracking
firewall.
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_SIP
tristate "SIP protocol support"
default m if NETFILTER_ADVANCED=n
help
SIP is an application-layer control protocol that can establish,
modify, and terminate multimedia sessions (conferences) such as
Internet telephony calls. With the nf_conntrack_sip and
the nf_nat_sip modules you can support the protocol on a connection
tracking/NATing firewall.
To compile it as a module, choose M here. If unsure, say N.
config NF_CONNTRACK_TFTP
tristate "TFTP protocol support"
depends on NETFILTER_ADVANCED
help
TFTP connection tracking helper, this is required depending
on how restrictive your ruleset is.
If you are using a tftp client behind -j SNAT or -j MASQUERADING
you will need this.
To compile it as a module, choose M here. If unsure, say N.
config NF_CT_NETLINK
tristate 'Connection tracking netlink interface'
select NETFILTER_NETLINK
default m if NETFILTER_ADVANCED=n
help
This option enables support for a netlink-based userspace interface
config NF_CT_NETLINK_TIMEOUT
tristate 'Connection tracking timeout tuning via Netlink'
select NETFILTER_NETLINK
depends on NETFILTER_ADVANCED
depends on NF_CONNTRACK_TIMEOUT
help
This option enables support for connection tracking timeout
fine-grain tuning. This allows you to attach specific timeout
policies to flows, instead of using the global timeout policy.
If unsure, say `N'.
config NF_CT_NETLINK_HELPER
tristate 'Connection tracking helpers in user-space via Netlink'
select NETFILTER_NETLINK
depends on NF_CT_NETLINK
depends on NETFILTER_NETLINK_QUEUE
depends on NETFILTER_NETLINK_GLUE_CT
depends on NETFILTER_ADVANCED
help
This option enables the user-space connection tracking helpers
infrastructure.
If unsure, say `N'.
config NETFILTER_NETLINK_GLUE_CT
bool "NFQUEUE and NFLOG integration with Connection Tracking"
default n
depends on (NETFILTER_NETLINK_QUEUE || NETFILTER_NETLINK_LOG) && NF_CT_NETLINK
help
If this option is enabled, NFQUEUE and NFLOG can include
Connection Tracking information together with the packet is
the enqueued via NFNETLINK.
config NF_NAT
tristate "Network Address Translation support"
depends on NF_CONNTRACK
default m if NETFILTER_ADVANCED=n
help
The NAT option allows masquerading, port forwarding and other
forms of full Network Address Port Translation. This can be
controlled by iptables, ip6tables or nft.
config NF_NAT_AMANDA
tristate
depends on NF_CONNTRACK && NF_NAT
default NF_NAT && NF_CONNTRACK_AMANDA
config NF_NAT_FTP
tristate
depends on NF_CONNTRACK && NF_NAT
default NF_NAT && NF_CONNTRACK_FTP
config NF_NAT_IRC
tristate
depends on NF_CONNTRACK && NF_NAT
default NF_NAT && NF_CONNTRACK_IRC
config NF_NAT_SIP
tristate
depends on NF_CONNTRACK && NF_NAT
default NF_NAT && NF_CONNTRACK_SIP
config NF_NAT_TFTP
tristate
depends on NF_CONNTRACK && NF_NAT
default NF_NAT && NF_CONNTRACK_TFTP
config NF_NAT_REDIRECT
bool
config NF_NAT_MASQUERADE
bool
config NETFILTER_SYNPROXY
tristate
endif # NF_CONNTRACK
config NF_TABLES
select NETFILTER_NETLINK
select LIBCRC32C
tristate "Netfilter nf_tables support"
help
nftables is the new packet classification framework that intends to
replace the existing {ip,ip6,arp,eb}_tables infrastructure. It
provides a pseudo-state machine with an extensible instruction-set
(also known as expressions) that the userspace 'nft' utility
(https://www.netfilter.org/projects/nftables) uses to build the
rule-set. It also comes with the generic set infrastructure that
allows you to construct mappings between matchings and actions
for performance lookups.
To compile it as a module, choose M here.
if NF_TABLES
config NF_TABLES_INET
depends on IPV6
select NF_TABLES_IPV4
select NF_TABLES_IPV6
bool "Netfilter nf_tables mixed IPv4/IPv6 tables support"
help
This option enables support for a mixed IPv4/IPv6 "inet" table.
config NF_TABLES_NETDEV
bool "Netfilter nf_tables netdev tables support"
help
This option enables support for the "netdev" table.
config NFT_NUMGEN
tristate "Netfilter nf_tables number generator module"
help
This option adds the number generator expression used to perform
incremental counting and random numbers bound to a upper limit.
config NFT_CT
depends on NF_CONNTRACK
tristate "Netfilter nf_tables conntrack module"
help
This option adds the "ct" expression that you can use to match
connection tracking information such as the flow state.
config NFT_FLOW_OFFLOAD
depends on NF_CONNTRACK && NF_FLOW_TABLE
tristate "Netfilter nf_tables hardware flow offload module"
help
This option adds the "flow_offload" expression that you can use to
choose what flows are placed into the hardware.
config NFT_COUNTER
tristate "Netfilter nf_tables counter module"
help
This option adds the "counter" expression that you can use to
include packet and byte counters in a rule.
config NFT_CONNLIMIT
tristate "Netfilter nf_tables connlimit module"
depends on NF_CONNTRACK
depends on NETFILTER_ADVANCED
select NETFILTER_CONNCOUNT
help
This option adds the "connlimit" expression that you can use to
ratelimit rule matchings per connections.
config NFT_LOG
tristate "Netfilter nf_tables log module"
help
This option adds the "log" expression that you can use to log
packets matching some criteria.
config NFT_LIMIT
tristate "Netfilter nf_tables limit module"
help
This option adds the "limit" expression that you can use to
ratelimit rule matchings.
config NFT_MASQ
depends on NF_CONNTRACK
depends on NF_NAT
select NF_NAT_MASQUERADE
tristate "Netfilter nf_tables masquerade support"
help
This option adds the "masquerade" expression that you can use
to perform NAT in the masquerade flavour.
config NFT_REDIR
depends on NF_CONNTRACK
depends on NF_NAT
tristate "Netfilter nf_tables redirect support"
select NF_NAT_REDIRECT
help
This options adds the "redirect" expression that you can use
to perform NAT in the redirect flavour.
config NFT_NAT
depends on NF_CONNTRACK
select NF_NAT
depends on NF_TABLES_IPV4 || NF_TABLES_IPV6
tristate "Netfilter nf_tables nat module"
help
This option adds the "nat" expression that you can use to perform
typical Network Address Translation (NAT) packet transformations.
config NFT_TUNNEL
tristate "Netfilter nf_tables tunnel module"
help
This option adds the "tunnel" expression that you can use to set
tunneling policies.
config NFT_OBJREF
tristate "Netfilter nf_tables stateful object reference module"
help
This option adds the "objref" expression that allows you to refer to
stateful objects, such as counters and quotas.
config NFT_QUEUE
depends on NETFILTER_NETLINK_QUEUE
tristate "Netfilter nf_tables queue module"
help
This is required if you intend to use the userspace queueing
infrastructure (also known as NFQUEUE) from nftables.
config NFT_QUOTA
tristate "Netfilter nf_tables quota module"
help
This option adds the "quota" expression that you can use to match
enforce bytes quotas.
config NFT_REJECT
default m if NETFILTER_ADVANCED=n
tristate "Netfilter nf_tables reject support"
depends on !NF_TABLES_INET || (IPV6!=m || m)
help
This option adds the "reject" expression that you can use to
explicitly deny and notify via TCP reset/ICMP informational errors
unallowed traffic.
config NFT_REJECT_INET
depends on NF_TABLES_INET
default NFT_REJECT
tristate
config NFT_COMPAT
depends on NETFILTER_XTABLES
tristate "Netfilter x_tables over nf_tables module"
help
This is required if you intend to use any of existing
x_tables match/target extensions over the nf_tables
framework.
config NFT_HASH
tristate "Netfilter nf_tables hash module"
help
This option adds the "hash" expression that you can use to perform
a hash operation on registers.
config NFT_FIB
tristate
config NFT_FIB_INET
depends on NF_TABLES_INET
depends on NFT_FIB_IPV4
depends on NFT_FIB_IPV6
tristate "Netfilter nf_tables fib inet support"
help
This option allows using the FIB expression from the inet table.
The lookup will be delegated to the IPv4 or IPv6 FIB depending
on the protocol of the packet.
config NFT_XFRM
tristate "Netfilter nf_tables xfrm/IPSec security association matching"
depends on XFRM
help
This option adds an expression that you can use to extract properties
of a packets security association.
config NFT_SOCKET
tristate "Netfilter nf_tables socket match support"
depends on IPV6 || IPV6=n
select NF_SOCKET_IPV4
select NF_SOCKET_IPV6 if NF_TABLES_IPV6
help
This option allows matching for the presence or absence of a
corresponding socket and its attributes.
config NFT_OSF
tristate "Netfilter nf_tables passive OS fingerprint support"
depends on NETFILTER_ADVANCED
select NETFILTER_NETLINK_OSF
help
This option allows matching packets from an specific OS.
config NFT_TPROXY
tristate "Netfilter nf_tables tproxy support"
depends on IPV6 || IPV6=n
select NF_DEFRAG_IPV4
select NF_DEFRAG_IPV6 if NF_TABLES_IPV6
select NF_TPROXY_IPV4
select NF_TPROXY_IPV6 if NF_TABLES_IPV6
help
This makes transparent proxy support available in nftables.
config NFT_SYNPROXY
tristate "Netfilter nf_tables SYNPROXY expression support"
depends on NF_CONNTRACK && NETFILTER_ADVANCED
select NETFILTER_SYNPROXY
select SYN_COOKIES
help
The SYNPROXY expression allows you to intercept TCP connections and
establish them using syncookies before they are passed on to the
server. This allows to avoid conntrack and server resource usage
during SYN-flood attacks.
if NF_TABLES_NETDEV
config NF_DUP_NETDEV
tristate "Netfilter packet duplication support"
help
This option enables the generic packet duplication infrastructure
for Netfilter.
config NFT_DUP_NETDEV
tristate "Netfilter nf_tables netdev packet duplication support"
select NF_DUP_NETDEV
help
This option enables packet duplication for the "netdev" family.
config NFT_FWD_NETDEV
tristate "Netfilter nf_tables netdev packet forwarding support"
select NF_DUP_NETDEV
help
This option enables packet forwarding for the "netdev" family.
config NFT_FIB_NETDEV
depends on NFT_FIB_IPV4
depends on NFT_FIB_IPV6
tristate "Netfilter nf_tables netdev fib lookups support"
help
This option allows using the FIB expression from the netdev table.
The lookup will be delegated to the IPv4 or IPv6 FIB depending
on the protocol of the packet.
endif # NF_TABLES_NETDEV
endif # NF_TABLES
config NF_FLOW_TABLE_INET
tristate "Netfilter flow table mixed IPv4/IPv6 module"
depends on NF_FLOW_TABLE
help
This option adds the flow table mixed IPv4/IPv6 support.
To compile it as a module, choose M here.
config NF_FLOW_TABLE
tristate "Netfilter flow table module"
depends on NETFILTER_INGRESS
depends on NF_CONNTRACK
depends on NF_TABLES
help
This option adds the flow table core infrastructure.
To compile it as a module, choose M here.
config NETFILTER_XTABLES
tristate "Netfilter Xtables support (required for ip_tables)"
default m if NETFILTER_ADVANCED=n
help
This is required if you intend to use any of ip_tables,
ip6_tables or arp_tables.
if NETFILTER_XTABLES
comment "Xtables combined modules"
config NETFILTER_XT_MARK
tristate 'nfmark target and match support'
default m if NETFILTER_ADVANCED=n
help
This option adds the "MARK" target and "mark" match.
Netfilter mark matching allows you to match packets based on the
"nfmark" value in the packet.
The target allows you to create rules in the "mangle" table which alter
the netfilter mark (nfmark) field associated with the packet.
Prior to routing, the nfmark can influence the routing method and can
also be used by other subsystems to change their behavior.
config NETFILTER_XT_CONNMARK
tristate 'ctmark target and match support'
depends on NF_CONNTRACK
depends on NETFILTER_ADVANCED
select NF_CONNTRACK_MARK
help
This option adds the "CONNMARK" target and "connmark" match.
Netfilter allows you to store a mark value per connection (a.k.a.
ctmark), similarly to the packet mark (nfmark). Using this
target and match, you can set and match on this mark.
config NETFILTER_XT_SET
tristate 'set target and match support'
depends on IP_SET
depends on NETFILTER_ADVANCED
help
This option adds the "SET" target and "set" match.
Using this target and match, you can add/delete and match
elements in the sets created by ipset(8).
To compile it as a module, choose M here. If unsure, say N.
# alphabetically ordered list of targets
comment "Xtables targets"
config NETFILTER_XT_TARGET_AUDIT
tristate "AUDIT target support"
depends on AUDIT
depends on NETFILTER_ADVANCED
help
This option adds a 'AUDIT' target, which can be used to create
audit records for packets dropped/accepted.
To compileit as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_CHECKSUM
tristate "CHECKSUM target support"
depends on IP_NF_MANGLE || IP6_NF_MANGLE
depends on NETFILTER_ADVANCED
help
This option adds a `CHECKSUM' target, which can be used in the iptables mangle
table to work around buggy DHCP clients in virtualized environments.
Some old DHCP clients drop packets because they are not aware
that the checksum would normally be offloaded to hardware and
thus should be considered valid.
This target can be used to fill in the checksum using iptables
when such packets are sent via a virtual network device.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_CLASSIFY
tristate '"CLASSIFY" target support'
depends on NETFILTER_ADVANCED
help
This option adds a `CLASSIFY' target, which enables the user to set
the priority of a packet. Some qdiscs can use this value for
classification, among these are:
atm, cbq, dsmark, pfifo_fast, htb, prio
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_CONNMARK
tristate '"CONNMARK" target support'
depends on NF_CONNTRACK
depends on NETFILTER_ADVANCED
select NETFILTER_XT_CONNMARK
help
This is a backwards-compat option for the user's convenience
(e.g. when running oldconfig). It selects
CONFIG_NETFILTER_XT_CONNMARK (combined connmark/CONNMARK module).
config NETFILTER_XT_TARGET_CONNSECMARK
tristate '"CONNSECMARK" target support'
depends on NF_CONNTRACK && NF_CONNTRACK_SECMARK
default m if NETFILTER_ADVANCED=n
help
The CONNSECMARK target copies security markings from packets
to connections, and restores security markings from connections
to packets (if the packets are not already marked). This would
normally be used in conjunction with the SECMARK target.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_CT
tristate '"CT" target support'
depends on NF_CONNTRACK
depends on IP_NF_RAW || IP6_NF_RAW
depends on NETFILTER_ADVANCED
help
This options adds a `CT' target, which allows to specify initial
connection tracking parameters like events to be delivered and
the helper to be used.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_DSCP
tristate '"DSCP" and "TOS" target support'
depends on IP_NF_MANGLE || IP6_NF_MANGLE
depends on NETFILTER_ADVANCED
help
This option adds a `DSCP' target, which allows you to manipulate
the IPv4/IPv6 header DSCP field (differentiated services codepoint).
The DSCP field can have any value between 0x0 and 0x3f inclusive.
It also adds the "TOS" target, which allows you to create rules in
the "mangle" table which alter the Type Of Service field of an IPv4
or the Priority field of an IPv6 packet, prior to routing.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_HL
tristate '"HL" hoplimit target support'
depends on IP_NF_MANGLE || IP6_NF_MANGLE
depends on NETFILTER_ADVANCED
help
This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
targets, which enable the user to change the
hoplimit/time-to-live value of the IP header.
While it is safe to decrement the hoplimit/TTL value, the
modules also allow to increment and set the hoplimit value of
the header to arbitrary values. This is EXTREMELY DANGEROUS
since you can easily create immortal packets that loop
forever on the network.
config NETFILTER_XT_TARGET_HMARK
tristate '"HMARK" target support'
depends on IP6_NF_IPTABLES || IP6_NF_IPTABLES=n
depends on NETFILTER_ADVANCED
help
This option adds the "HMARK" target.
The target allows you to create rules in the "raw" and "mangle" tables
which set the skbuff mark by means of hash calculation within a given
range. The nfmark can influence the routing method and can also be used
by other subsystems to change their behaviour.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_IDLETIMER
tristate "IDLETIMER target support"
depends on NETFILTER_ADVANCED
help
This option adds the `IDLETIMER' target. Each matching packet
resets the timer associated with label specified when the rule is
added. When the timer expires, it triggers a sysfs notification.
The remaining time for expiration can be read via sysfs.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_LED
tristate '"LED" target support'
depends on LEDS_CLASS && LEDS_TRIGGERS
depends on NETFILTER_ADVANCED
help
This option adds a `LED' target, which allows you to blink LEDs in
response to particular packets passing through your machine.
This can be used to turn a spare LED into a network activity LED,
which only flashes in response to FTP transfers, for example. Or
you could have an LED which lights up for a minute or two every time
somebody connects to your machine via SSH.
You will need support for the "led" class to make this work.
To create an LED trigger for incoming SSH traffic:
iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
Then attach the new trigger to an LED on your system:
echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
For more information on the LEDs available on your system, see
Documentation/leds/leds-class.rst
config NETFILTER_XT_TARGET_LOG
tristate "LOG target support"
select NF_LOG_COMMON
select NF_LOG_IPV4
select NF_LOG_IPV6 if IP6_NF_IPTABLES
default m if NETFILTER_ADVANCED=n
help
This option adds a `LOG' target, which allows you to create rules in
any iptables table which records the packet header to the syslog.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_MARK
tristate '"MARK" target support'
depends on NETFILTER_ADVANCED
select NETFILTER_XT_MARK
help
This is a backwards-compat option for the user's convenience
(e.g. when running oldconfig). It selects
CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
config NETFILTER_XT_NAT
tristate '"SNAT and DNAT" targets support'
depends on NF_NAT
help
This option enables the SNAT and DNAT targets.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_NETMAP
tristate '"NETMAP" target support'
depends on NF_NAT
help
NETMAP is an implementation of static 1:1 NAT mapping of network
addresses. It maps the network address part, while keeping the host
address part intact.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_NFLOG
tristate '"NFLOG" target support'
default m if NETFILTER_ADVANCED=n
select NETFILTER_NETLINK_LOG
help
This option enables the NFLOG target, which allows to LOG
messages through nfnetlink_log.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_NFQUEUE
tristate '"NFQUEUE" target Support'
depends on NETFILTER_ADVANCED
select NETFILTER_NETLINK_QUEUE
help
This target replaced the old obsolete QUEUE target.
As opposed to QUEUE, it supports 65535 different queues,
not just one.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_NOTRACK
tristate '"NOTRACK" target support (DEPRECATED)'
depends on NF_CONNTRACK
depends on IP_NF_RAW || IP6_NF_RAW
depends on NETFILTER_ADVANCED
select NETFILTER_XT_TARGET_CT
config NETFILTER_XT_TARGET_RATEEST
tristate '"RATEEST" target support'
depends on NETFILTER_ADVANCED
help
This option adds a `RATEEST' target, which allows to measure
rates similar to TC estimators. The `rateest' match can be
used to match on the measured rates.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_TARGET_REDIRECT
tristate "REDIRECT target support"
depends on NF_NAT
select NF_NAT_REDIRECT
help
REDIRECT is a special case of NAT: all incoming connections are
mapped onto the incoming interface's address, causing the packets to
come to the local machine instead of passing through. This is
useful for transparent proxies.