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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
|
.\" $OpenBSD: isakmpd.conf.5,v 1.108 2005/10/06 18:29:18 hshoexer Exp $
.\" $EOM: isakmpd.conf.5,v 1.57 2000/12/21 14:43:17 ho Exp $
.\"
.\" Copyright (c) 1998, 1999, 2000 Niklas Hallqvist. All rights reserved.
.\" Copyright (c) 2000, 2001, 2002 Håkan Olsson. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" This code was written under funding by Ericsson Radio Systems.
.\"
.\" Manual page, using -mandoc macros
.\"
.Dd August 07, 2002
.Dt ISAKMPD.CONF 5
.Os
.Sh NAME
.Nm isakmpd.conf
.Nd configuration file for isakmpd
.Sh DESCRIPTION
.Nm
is the configuration file for the
.Xr isakmpd 8
daemon, managing security association and key management for the
IPsec layer of the kernel's networking stack.
.Pp
The file is of a well known type of format called .INI style, named after
the suffix used by an overrated windowing environment for its configuration
files.
This format consists of sections, each beginning with a line looking like:
.Bd -unfilled
.Bq Sy Section name
.Ed
Between the brackets is the name of the section following this section header.
Inside a section many tag/value pairs can be stored, each one looking like:
.Bd -unfilled
.Ar Tag Ns = Ns Ar Value
.Ed
If the value needs more space than fits on a single line, it's possible to
continue it on the next by ending the first with a backslash character
immediately before the newline character.
This method can extend a value for an arbitrary number of lines.
.Pp
Comments can be put anywhere in the file by using a hash mark
.Pq Sq \&# .
The comment extends to the end of the current line.
.Pp
Often the right-hand side values consist of other section names.
This results in a tree structure.
Some values are treated as a list of several scalar values.
Such lists always use a comma character as the separator.
Some values are formatted like this: X,Y:Z, which
is an offer/accept syntax, where X is a value we offer and Y:Z is a range of
accepted values, inclusive.
.Pp
To activate changes to
.Nm
without restarting
.Xr isakmpd 8 ,
send a
.Dv SIGHUP
signal to the daemon process.
.Sh AUTO-GENERATED PARTS OF THE CONFIGURATION
Some predefined section names are recognized by the daemon, avoiding the need
to fully specify the Main Mode transforms and Quick Mode suites, protocols,
and transforms.
.Pp
For Main Mode:
.\" .Ar {DES,BLF,3DES,CAST,AES}-{MD5,SHA}[-GRP{1,2,5,14}][-RSA_SIG]
.Bl -inset -compact
.It Xo
.Sm off
.No {
.Ar DES , BLF , 3DES , CAST , AES
.No }-{
.Ar MD5 , SHA
.No }[-
.Ar GRP
.No {
.Ar 1 , 2 , 5 , 14
.No }]
.No [-
.Ar RSA_SIG
.No ]
.Sm on
.Xc
.El
.Pp
For Quick Mode:
.\" .Ar QM-{proto}[-TRP]-{cipher}[-{hash}][-PFS[-{group}]]-SUITE
.Bl -inset -compact
.It Xo
.Sm off
.Ar QM
.No -{
.Ar proto
.No }[-
.Ar TRP
.No ]-{
.Ar cipher
.No }[-{
.Ar hash
.No }]
.No [-
.Ar PFS
.No [-{
.Ar group
.No }]]-
.Ar SUITE
.Sm on
.Xc
.El
.Pp
where:
.Bl -tag -width "{cipher}" -offset indent -compact
.It Ns { Ns Ar proto Ns }
is either ESP or AH
.It Ns { Ns Ar cipher Ns }
is either DES, 3DES, CAST, BLF, or AES
.It Ns { Ns Ar hash Ns }
is either MD5, SHA, RIPEMD, or SHA2-{256,384,512}
.It Ns { Ns Ar group Ns }
is either GRP1, GRP2, GRP5, or GRP14
.El
.Pp
For example, 3DES-SHA means: 3DES encryption, SHA hash, and authorization by
pre-shared keys.
Similarly, QM-ESP-3DES-SHA-PFS-SUITE means: ESP protocol, 3DES encryption,
SHA hash, and use Perfect Forward Secrecy.
.Pp
Unless explicitly stated with -GRP1, 2, 5, or 14, transforms and PFS suites
use DH group 2.
There are currently no predefined ESP+AH Quick Mode suites.
.Pp
The predefinitions include some default values for the special
sections "General", "Keynote", "X509-certificates", and
"Default-phase-1-configuration".
These default values are presented in the example below.
.Pp
All autogenerated values can be overridden by manual entries by using the
same section and tag names in the configuration file.
In particular, the default phase 1 (Main or Aggressive Mode) and phase 2
(Quick Mode) lifetimes can be overridden by these tags under the "General"
section:
.Bd -literal -offset indent
[General]
Default-phase-1-lifetime= 3600,60:86400
Default-phase-2-lifetime= 1200,60:86400
.Ed
.Pp
The Main Mode lifetime currently defaults to one hour (minimum 60
seconds, maximum 1 day).
The Quick Mode lifetime defaults to 20 minutes
(minimum 60 seconds, maximum 1 day).
.Pp
Also, the default phase 1 ID can be set by creating a
.Aq Sy Phase1-ID
section, as shown below, and adding this tag under the "General"
section:
.Bd -literal -offset indent
[General]
Default-phase-1-ID= Phase1-ID-name
[Phase1-ID-name]
ID-type= USER_FQDN
Name= foo@bar.com
.Ed
.Sh ROOTS
.Bl -hang -width 8n
.It Bq Sy General
Generic global configuration parameters
.Bl -tag -width Ds
.It Em Acquire-Only
If this tag is defined,
.Xr isakmpd 8
will not set up flows automatically.
This is useful when flows are configured with
.Xr ipsecadm 8
or by other programs like
.Xr bgpd 8 .
Thus
.Xr isakmpd 8
only takes care of the SA establishment.
.It Em Check-interval
The interval between watchdog checks of connections we want up at all
times, in seconds.
The default value is 60 seconds.
.It Em Default-phase-1-ID
Optional default phase 1 ID name.
.It Em Default-phase-1-lifetime
The default lifetime for autogenerated transforms (phase 1).
If unspecified, the value 3600,60:86400 is used as the default.
.It Em Default-phase-2-lifetime
The default lifetime for autogenerated suites (phase 2).
If unspecified, the value 1200,60:86400 is used as the default.
.It Em Default-phase-2-suites
A list of phase 2 suites that will be used when establishing dynamic
SAs.
If left unspecified, QM-ESP-3DES-SHA-PFS-SUITE is used as the default.
.It Em DPD-check-interval
The interval between RFC 3706 (Dead Peer Detection) messages, in seconds.
The default value is 0 (zero), which means DPD is disabled.
.It Em Exchange-max-time
How many seconds should an exchange maximally take to set up before we
give up.
.It Em Listen-on
A list of IP addresses or interface names OK to listen on.
This list is used as a filter for the set of addresses the interfaces
configured provides.
This means that we won't see if an address given here does not exist
on this host, and thus no error is given for that case.
.It Em Loglevel
A list of the form
.Ar class Ns = Ns Ar level ,
where both
.Ar class
and
.Ar level
are numbers.
This is similar to the
.Fl D
command line switch of
.Xr isakmpd 8 .
.It Em Logverbose
If this tag is defined, whatever the value is, verbose logging is enabled.
This is similar to the
.Fl v
command line switch of
.Xr isakmpd 8 .
.It Em NAT-T-Keepalive
The number of seconds between NAT-T keepalive messages, sent by the
peer behind NAT to keep the mapping active.
Defaults to 20.
.It Em Policy-file
The name of the file that contains
.Xr keynote 4
policies.
The default is
.Pa /etc/isakmpd/isakmpd.policy .
.It Em Pubkey-directory
The directory in which
.Nm
looks for explicitly trusted public keys.
The default is
.Pa /etc/isakmpd/pubkeys .
Read
.Xr isakmpd 8
for the required naming convention of the files in here.
.It Em Renegotiate-on-HUP
If this tag is defined, whatever the value is,
.Xr isakmpd 8
will renegotiate all current phase 2 SAs when the daemon receives a
.Dv SIGHUP
signal, or an
.Sq R
is sent to the FIFO interface (see
.Xr isakmpd 8 ) .
.It Em Retransmits
How many times should a message be retransmitted before giving up.
.It Em Shared-SADB
If this tag is defined, whatever the value is, some semantics of
.Nm
are changed so that multiple instances can run on top of one SADB
and set up SAs with each other.
Specifically this means replay
protection will not be asked for, and errors that can occur when
updating an SA with its parameters a 2nd time will be ignored.
.It Em Use-Keynote
This tag controls the use of
.Xr keynote 4
policy checking.
The default value is
.Qq yes ,
which enables the policy checking.
When set to any other value, policies will not be checked.
This is useful when policies for flows and SA establishment are arranged by
other programs like
.Xr ipsecadm 8
or
.Xr bgpd 8 .
.El
.It Bq Sy Phase 1
ISAKMP SA negotiation parameter root
.Bl -tag -width Ds
.It Em Default
A name of the default ISAKMP peer.
Incoming phase 1 connections from other IP addresses will use this peer name.
This name is used as the section name for further information to be found.
Look at
.Aq Sy ISAKMP-peer
below.
.It Aq Em IP-address
A name of the ISAKMP peer at the given IP address.
.El
.It Bq Sy Phase 2
IPsec SA negotiation parameter root
.Bl -tag -width Ds
.It Em Connections
A list of directed IPsec "connection" names that should be brought up
automatically, either on first use if the system supports it, or at
startup of the daemon.
These names are section names where further information can be found.
Look at
.Aq Sy IPsec-connection
below.
Normally any connections mentioned here are treated as part of the
"Passive-connection" list we present below; however there is a flag,
.Em Active-only ,
that disables this behaviour.
This too is mentioned in the
.Aq Sy IPsec-connection
section, in the "Flags" tag.
.It Em Passive-connections
A list of IPsec "connection" names we recognize and accept initiations for.
These names are section names where further information can be found.
Look at
.Aq Sy IPsec-connection
below.
Currently only the Local-ID and Remote-ID tags
are looked at in those sections, as they are matched against the IDs given
by the initiator.
.El
.It Bq Sy KeyNote
KeyNote configuration section
.Bl -tag -width Ds
.It Em Credential-directory
A directory containing directories named after IDs (IP
addresses,
.Dq user@domain ,
or hostnames) that contain files named
.Dq credentials
and
.Dq private_key .
.Pp
The credentials file contains
.Xr keynote 4
credentials that are sent to a remote IKE daemon when we use the
associated ID, or credentials that we may want to consider when doing
an exchange with a remote IKE daemon that uses that ID.
Note that, in the former case, the last credential in the file
MUST contain our public key in its Licensees field.
More than one credentials may exist in the file.
They are separated by whitelines (the format is essentially the same as
that of the policy file).
The credentials are of the same format as the policies described in
.Xr isakmpd.policy 5 .
The only difference is that the Authorizer field contains a public
key, and the assertion is signed.
Signed assertions can be generated using the
.Xr keynote 1
utility.
.Pp
The private_key file contains the private RSA key we use for
authentication.
If the directory (and the files) exist, they take precedence over X509-based
authentication.
.El
.It Bq Sy X509-Certificates
X509-certificate configuration section
.Bl -tag -width Ds
.It Em Accept-self-signed
If this tag is defined, whatever the value is, certificates that
do not originate from a trusted CA but are self-signed will be
accepted.
.It Em Ca-directory
A directory containing PEM certificates of certification authorities
that we trust to sign other certificates.
Note that for a CA to be really trusted, it needs to be somehow
referred to by policy, in
.Xr isakmpd.policy 5 .
The certificates in this directory are used for the actual X.509
authentication and for cross-referencing policies that refer to
Distinguished Names (DNs).
Keeping a separate directory (as opposed to integrating policies
and X.509 CA certificates) allows for maintenance of a list of
"well known" CAs without actually having to trust all (or any) of them.
.It Em Cert-directory
A directory containing PEM certificates that we trust to be valid.
These certificates are used in preference to those passed in messages and
are required to have a subjectAltName extension containing the certificate
holder identity; usually IP address, FQDN, or User FQDN.
.It Em Private-key
The private key matching the public key of our certificate (which should be
in the "Cert-directory", and have an appropriate subjectAltName field).
.El
.El
.Sh REFERRED-TO SECTIONS
.Bl -hang -width Ds
.It Aq Sy ISAKMP-peer
Parameters for negotiation with an ISAKMP peer
.Bl -tag -width Ds
.It Em Address
If existent, the IP address of the peer.
.It Em Authentication
If existent, authentication data for this specific peer.
In the case of a pre-shared key, this is the key value itself.
.It Em Configuration
The name of the ISAKMP-configuration section to use.
Look at
.Aq Sy ISAKMP-configuration
below.
If unspecified, defaults to "Default-phase-1-configuration".
.It Em Flags
A comma-separated list of flags controlling the further
handling of the ISAKMP SA.
Currently there are no specific ISAKMP SA flags defined.
.It Em ID
If existent, the name of the section that describes the
local client ID that we should present to our peer.
If not present, it
defaults to the address of the local interface we are sending packets
over to the remote daemon.
Look at
.Aq Sy Phase1-ID
below.
.It Em Local-address
The Local IP address to use, if we are multi-homed, or have aliases.
.It Em Phase
The constant
.Sq 1 ,
as ISAKMP-peers and IPsec-connections
really are handled by the same code inside
.Xr isakmpd 8 .
.It Em Port
For UDP, the UDP port number to send to.
This is optional;
the default value is 500 which is the IANA-registered number for ISAKMP.
.It Em Remote-ID
If existent, the name of the section that describes the remote client
ID we expect the remote daemon to send us.
If not present, it defaults to the address of the remote daemon.
Look at
.Aq Sy Phase1-ID
below.
.It Em Transport
The name of the transport protocol; defaults to UDP.
.El
.It Aq Sy Phase1-ID
Parameters for Phase 1 negotiation
.Bl -tag -width Ds
.It Em Address
If the ID-type is
.Li IPV4_ADDR
or
.Li IPV6_ADDR ,
this tag should exist and be an IP address.
.It Em ID-type
The ID type as given by the RFC specifications.
For phase 1 this is currently
.Li IPV4_ADDR ,
.Li IPV4_ADDR_SUBNET ,
.Li IPV6_ADDR ,
.Li IPV6_ADDR_SUBNET ,
.Li FQDN ,
.Li USER_FQDN ,
or
.Li KEY_ID .
.It Em Name
If the ID-type is
.Li FQDN ,
.Li USER_FQDN ,
or
.Li KEY_ID ,
this tag should exist and contain a domain name, user@domain, or
other identifying string respectively.
.Pp
In the case of
.Li KEY_ID ,
note that the IKE protocol allows any octet sequence to be sent or
received under this payload, potentially including non-printable
ones.
.Xr isakmpd 8
can only transmit printable
.Li KEY_ID
payloads, but can receive and process arbitrary
.Li KEY_ID
payloads.
This effectively means that non-printable
.Li KEY_ID
remote identities cannot be verified through this means, although it
is still possible to do so through
.Xr isakmpd.policy 5 .
.It Em Netmask
If the ID-type is
.Li IPV4_ADDR_SUBNET
or
.Li IPV6_ADDR_SUBNET ,
this tag should exist and
be a network subnet mask.
.It Em Network
If the ID-type is
.Li IPV4_ADDR_SUBNET
or
.Li IPV6_ADDR_SUBNET ,
this tag should exist and
be a network address.
.El
.It Aq Sy ISAKMP-configuration
Parameters for ISAKMP configuration
.Bl -tag -width Ds
.It Em DOI
The domain of interpretation as given by the RFCs.
Normally
.Li IPSEC .
If unspecified, defaults to
.Li IPSEC .
.It Em EXCHANGE_TYPE
The exchange type as given by the RFCs.
For main mode this is
.Li ID_PROT
and for aggressive mode it is
.Li AGGRESSIVE .
.It Em Transforms
A list of proposed transforms to use for protecting the
ISAKMP traffic.
These are actually names for sections
further describing the transforms.
Look at
.Aq Sy ISAKMP-transform
below.
.El
.It Aq Sy ISAKMP-transform
Parameters for ISAKMP authentication
.Bl -tag -width Ds
.It Em AUTHENTICATION_METHOD
The authentication method as the RFCs name it, or ANY.
.It Em ENCRYPTION_ALGORITHM
The encryption algorithm as the RFCs name it, or ANY to denote that any
encryption algorithm proposed will be accepted.
.It Em GROUP_DESCRIPTION
The group used for Diffie-Hellman exponentiations, or ANY.
The names are symbolic, like
.Li MODP_768 , MODP_1024 , EC_155 ,
and
.Li EC_185 .
.It Em HASH_ALGORITHM
The hash algorithm as the RFCs name it, or ANY.
.It Em KEY_LENGTH
For encryption algorithms with variable key length, this is
where the offered/accepted keylengths are described.
The value is of the offer-accept kind described above.
.It Em Life
A list of lifetime descriptions, or ANY.
In the former case, each
element is in itself a name of the section that defines the lifetime.
Look at
.Aq Sy Lifetime
below.
If it is set to ANY, then any type of
proposed lifetime type and value will be accepted.
.It Em PRF
The algorithm to use for the keyed pseudo-random function (used for key
derivation and authentication in phase 1), or ANY.
.El
.It Aq Sy Lifetime
Parameters for connection duration
.Bl -tag -width Ds
.It Em LIFE_DURATION
An offer/accept kind of value; see above.
Can also be set to ANY.
.It Em LIFE_TYPE
.Li SECONDS
or
.Li KILOBYTES
depending on the type of the duration.
Notice that this field may NOT be set to ANY.
.El
.It Aq Sy IPsec-connection
Parameters for IPsec connection configuration
.Bl -tag -width Ds
.It Em Configuration
The name of the IPsec-configuration section to use.
Look at
.Aq Sy IPsec-configuration
below.
.It Em Flags
A comma-separated list of flags controlling the further
handling of the IPsec SA.
Currently only one flag is defined:
.Bl -tag -width 12n
.It Em Active-only
If this flag is given and this
.Aq Sy IPsec-connection
is part of the phase 2
connections we automatically keep up, it will not automatically be used for
accepting connections from the peer.
.El
.It Em ISAKMP-peer
The name of the ISAKMP-peer to talk to in order to
set up this connection.
The value is the name of an
.Aq Sy ISAKMP-peer
section.
See above.
.It Em Local-ID
If existent, the name of the section that describes the
optional local client ID that we should present to our peer.
It is also used when we act as responders to find out what
.Aq Sy IPsec-connection
we are dealing with.
Look at
.Aq Sy IPsec-ID
below.
.It Em Phase
The constant
.Sq 2 ,
as ISAKMP-peers and IPsec-connections
really are handled by the same code inside
.Xr isakmpd 8 .
.It Em Remote-ID
If existent, the name of the section that describes the
optional remote client ID that we should present to our peer.
It is also used when we act as responders to find out what
.Aq Sy IPsec-connection
we are dealing with.
Look at
.Aq Sy IPsec-ID
below.
.El
.It Aq Sy IPsec-configuration
Parameters for IPsec configuration
.Bl -tag -width Ds
.It Em DOI
The domain of interpretation as given by the RFCs.
Normally
.Li IPSEC .
If unspecified, defaults to
.Li IPSEC .
.It Em EXCHANGE_TYPE
The exchange type as given by the RFCs.
For quick mode this is
.Li QUICK_MODE .
.It Em Suites
A list of protection suites (bundles of protocols) usable for
protecting the IP traffic.
Each of the list elements is a name of an
.Aq Sy IPsec-suite
section.
See below.
.El
.It Aq Sy IPsec-suite
Parameters for IPsec protection suite configuration
.Bl -tag -width Ds
.It Em Protocols
A list of the protocols included in this protection suite.
Each of the list elements is a name of an
.Aq Sy IPsec-protocol
section.
See below.
.El
.It Aq Sy IPsec-protocol
Parameters for IPsec protocol configuration
.Bl -tag -width Ds
.It Em PROTOCOL_ID
The protocol as given by the RFCs.
Acceptable values are currently
.Li IPSEC_AH
and
.Li IPSEC_ESP .
.It Em ReplayWindow
The size of the window used for replay protection.
This is normally left alone.
Look at the ESP and AH RFCs for a better description.
.It Em Transforms
A list of transforms usable for implementing the protocol.
Each of the list elements is a name of an
.Aq Sy IPsec-transform
section.
See below.
.El
.It Aq Sy IPsec-transform
Parameters for IPsec transform configuration
.Bl -tag -width Ds
.It Em AUTHENTICATION_ALGORITHM
The optional authentication algorithm in the case of this
being an ESP transform.
.It Em ENCAPSULATION_MODE
The encapsulation mode as given by the RFCs.
This means TRANSPORT or TUNNEL.
.It Em GROUP_DESCRIPTION
An optional (provides PFS if present) Diffie-Hellman group
description.
The values are the same as those for GROUP_DESCRIPTION in
.Aq Sy ISAKMP-transform
sections shown above.
.It Em KEY_LENGTH
For encryption algorithms with variable key length, this is
where the offered keylength is described.
.It Em Life
List of lifetimes, each element is a
.Aq Sy Lifetime
section name.
.It Em TRANSFORM_ID
The transform ID as given by the RFCs.
.El
.It Aq Sy IPsec-ID
Parameters for IPsec ID configuration
.Bl -tag -width Ds
.It Em Address
If the ID-type is
.Li IPV4_ADDR
or
.Li IPV6_ADDR ,
this tag should exist and be an IP address, an interface name, or the
.Em default
keyword.
If an interface is used, the first address of the appropriate
family will be used.
The
.Em default
keyword uses the interface associated with the default route.
In the case of IPv6, link-local addresses will be skipped if
addresses which are not link-local exist.
If the address on the interface changes
.Xr isakmpd 8
will not track the change.
The configuration must be reloaded to learn the new address.
.It Em ID-type
The ID type as given by the RFCs.
For IPsec this is currently
.Li IPV4_ADDR ,
.Li IPV6_ADDR ,
.Li IPV4_ADDR_SUBNET ,
or
.Li IPV6_ADDR_SUBNET .
.It Em Netmask
If the ID-type is
.Li IPV4_ADDR_SUBNET
or
.Li IPV6_ADDR_SUBNET ,
this tag should exist and
be a network subnet mask or an interface.
When an interface is specified, the netmask is the mask associated with the
.Em Network .
The
.Em default
keyword uses the interface associated with the default route.
.It Em Network
If the ID-type is
.Li IPV4_ADDR_SUBNET
or
.Li IPV6_ADDR_SUBNET ,
this tag should exist and be a network address, an interface, or the
.Em default
keyword.
When an interface is specified, the network is selected as with the
.Em Address
tag.
.It Em Port
If the ID-type is
.Li IPV4_ADDR ,
.Li IPV4_ADDR_SUBNET ,
.Li IPV6_ADDR ,
or
.Li IPV6_ADDR_SUBNET ,
this tag indicates what source or destination port is allowed to be
transported over the SA (depending on whether this is a local or
remote ID).
If left unspecified, all ports of the given transport protocol
will be transmitted (or permitted) over the SA.
The
.Em Protocol
tag must be specified in conjunction with this tag.
.It Em Protocol
If the ID-type is
.Li IPV4_ADDR ,
.Li IPV4_ADDR_SUBNET ,
.Li IPV6_ADDR ,
or
.Li IPV6_ADDR_SUBNET ,
this tag indicates what transport protocol should be transmitted over
the SA.
If left unspecified, all transport protocols between the two address
(ranges) will be sent (or permitted) over that SA.
.El
.El
.Sh OTHER SECTIONS
.Bl -hang -width 8n
.It Aq Sy IKECFG-ID
Parameters to use with IKE mode-config.
One ID per peer.
.Pp
An IKECFG-ID is written as [<ID-type>/<name>].
The following ID types are supported:
.Pp
.Bl -tag -width "ASN1_DNXX" -offset indent -compact
.It IPv4
[ipv4/A.B.C.D]
.It IPv6
[ipv6/abcd:abcd::ab:cd]
.It FQDN
[fqdn/foo.bar.org]
.It UFQDN
[ufqdn/user@foo.bar.org]
.It ASN1_DN
[asn1_dn//C=aa/O=cc/...] (Note the double slashes as the DN itself
starts with a
.Sq / . )
.El
.Pp
Each section specifies what configuration values to return to the peer
requesting IKE mode-config.
Currently supported values are:
.Pp
.Bl -tag -width "WINS-serverXX" -offset indent -compact
.It Em Address
The peer's network address.
.It Em Netmask
The peer's netmask.
.It Em Nameserver
The IP address of a DNS nameserver.
.It Em WINS-server
The IP address of a WINS server.
.El
.It Aq Sy Initiator-ID
Parameters for peer initiator configuration
.Pp
During phase 1 negotiation
.Xr isakmpd 8
looks for a pre-shared key in the
.Aq Sy ISAKMP-peer
section.
If no Authentication data is specified in that section, and
.Xr isakmpd 8
is not the initiator, it looks for Authentication data in a section named after
the initiator's phase 1 ID.
This allows mobile users with dynamic IP addresses
to have different shared secrets.
.Pp
This only works for aggressive mode because in main mode the remote
initiator ID would not yet be known.
Note, however, that use of aggressive mode is discouraged.
See
.Sx CAVEATS ,
below.
.Pp
The name of the
.Aq Sy Initiator-ID
section depends on the ID type sent by the initiator.
Currently this can be:
.Pp
.Bl -tag -width "UFQDNXX" -offset indent -compact
.It IPv4
[A.B.C.D]
.It IPv6
[abcd:abcd::ab:cd]
.It FQDN
[foo.bar.org]
.It UFQDN
[user@foo.bar.org]
.El
.El
.Sh FILES
.Bl -tag -width /etc/isakmpd/isakmpd.conf
.It Pa /etc/isakmpd/isakmpd.conf
The default
.Xr isakmpd 8
configuration file.
.It Pa /usr/share/ipsec/isakmpd/
A directory containing some sample
.Xr isakmpd 8
configuration files.
.El
.Sh EXAMPLES
An example of a configuration file:
.Bd -literal
# A configuration sample for the isakmpd ISAKMP/Oakley (aka IKE) daemon.
[General]
Listen-on= 10.1.0.2
# Incoming phase 1 negotiations are multiplexed on the source IP address
[Phase 1]
10.1.0.1= ISAKMP-peer-west
# These connections are walked over after config file parsing and told
# to the application layer so that it will inform us when traffic wants to
# pass over them. This means we can do on-demand keying.
[Phase 2]
Connections= IPsec-east-west
# Default values are commented out.
[ISAKMP-peer-west]
Phase= 1
#Transport= udp
Local-address= 10.1.0.2
Address= 10.1.0.1
#Port= isakmp
#Port= 500
#Configuration= Default-phase-1-configuration
Authentication= mekmitasdigoat
#Flags=
[IPsec-east-west]
Phase= 2
ISAKMP-peer= ISAKMP-peer-west
Configuration= Default-quick-mode
Local-ID= Net-east
Remote-ID= Net-west
#Flags=
[Net-west]
ID-type= IPV4_ADDR_SUBNET
Network= 192.168.1.0
Netmask= 255.255.255.0
[Net-east]
ID-type= IPV4_ADDR_SUBNET
Network= 192.168.2.0
Netmask= 255.255.255.0
# Quick mode descriptions
[Default-quick-mode]
EXCHANGE_TYPE= QUICK_MODE
Suites= QM-ESP-3DES-SHA-PFS-SUITE,QM-ESP-AES-SHA-PFS-SUITE
# Data for an IKE mode-config peer
[asn1_dn//C=SE/L=SomeCity/O=SomeCompany/CN=SomePeer.company.com]
Address= 192.168.1.123
Netmask= 255.255.255.0
Nameserver= 192.168.1.10
WINS-server= 192.168.1.11
# pre-shared key based on initiator's phase 1 ID
[foo.bar.org]
Authentication= mekmitasdigoat
#
# #####################################################################
# All configuration data below this point is not required as the example
# uses the predefined Main Mode transform and Quick Mode suite names.
# It is included here for completeness. Note the default values for the
# [General] and [X509-certificates] sections just below.
# #####################################################################
#
[General]
Policy-file= /etc/isakmpd/isakmpd.policy
Retransmits= 3
Exchange-max-time= 120
# KeyNote credential storage
[KeyNote]
Credential-directory= /etc/isakmpd/keynote/
# Certificates stored in PEM format
[X509-certificates]
CA-directory= /etc/isakmpd/ca/
Cert-directory= /etc/isakmpd/certs/
CRL-directory= /etc/isakmpd/crls/
Private-key= /etc/isakmpd/private/local.key
# Default phase 1 description (Main Mode)
[Default-phase-1-configuration]
EXCHANGE_TYPE= ID_PROT
Transforms= 3DES-SHA
# Main mode transforms
######################
# DES
[DES-MD5]
ENCRYPTION_ALGORITHM= DES_CBC
HASH_ALGORITHM= MD5
AUTHENTICATION_METHOD= PRE_SHARED
GROUP_DESCRIPTION= MODP_1024
Life= Default-phase-1-lifetime
[DES-SHA]
ENCRYPTION_ALGORITHM= DES_CBC
HASH_ALGORITHM= SHA
AUTHENTICATION_METHOD= PRE_SHARED
GROUP_DESCRIPTION= MODP_1024
Life= Default-phase-1-lifetime
# 3DES
[3DES-SHA]
ENCRYPTION_ALGORITHM= 3DES_CBC
HASH_ALGORITHM= SHA
AUTHENTICATION_METHOD= PRE_SHARED
GROUP_DESCRIPTION= MODP_1024
Life= Default-phase-1-lifetime
# AES
[AES-SHA]
ENCRYPTION_ALGORITHM= AES_CBC
KEY_LENGTH= 128,128:256
HASH_ALGORITHM= SHA
AUTHENTICATION_METHOD= PRE_SHARED
GROUP_DESCRIPTION= MODP_1024
Life= Default-phase-1-lifetime
# Blowfish
[BLF-SHA]
ENCRYPTION_ALGORITHM= BLOWFISH_CBC
KEY_LENGTH= 128,96:192
HASH_ALGORITHM= SHA
AUTHENTICATION_METHOD= PRE_SHARED
GROUP_DESCRIPTION= MODP_1024
Life= Default-phase-1-lifetime
# Blowfish, using DH group 4 (non-default)
[BLF-SHA-EC185]
ENCRYPTION_ALGORITHM= BLOWFISH_CBC
KEY_LENGTH= 128,96:192
HASH_ALGORITHM= SHA
AUTHENTICATION_METHOD= PRE_SHARED
GROUP_DESCRIPTION= EC2N_185
Life= Default-phase-1-lifetime
# Quick mode protection suites
##############################
# DES
[QM-ESP-DES-SUITE]
Protocols= QM-ESP-DES
[QM-ESP-DES-PFS-SUITE]
Protocols= QM-ESP-DES-PFS
[QM-ESP-DES-MD5-SUITE]
Protocols= QM-ESP-DES-MD5
[QM-ESP-DES-MD5-PFS-SUITE]
Protocols= QM-ESP-DES-MD5-PFS
[QM-ESP-DES-SHA-SUITE]
Protocols= QM-ESP-DES-SHA
[QM-ESP-DES-SHA-PFS-SUITE]
Protocols= QM-ESP-DES-SHA-PFS
# 3DES
[QM-ESP-3DES-SHA-SUITE]
Protocols= QM-ESP-3DES-SHA
[QM-ESP-3DES-SHA-PFS-SUITE]
Protocols= QM-ESP-3DES-SHA-PFS
# AES
[QM-ESP-AES-SHA-SUITE]
Protocols= QM-ESP-AES-SHA
[QM-ESP-AES-SHA-PFS-SUITE]
Protocols= QM-ESP-AES-SHA-PFS
# AH
[QM-AH-MD5-SUITE]
Protocols= QM-AH-MD5
[QM-AH-MD5-PFS-SUITE]
Protocols= QM-AH-MD5-PFS
# AH + ESP (non-default)
[QM-AH-MD5-ESP-DES-SUITE]
Protocols= QM-AH-MD5,QM-ESP-DES
[QM-AH-MD5-ESP-DES-MD5-SUITE]
Protocols= QM-AH-MD5,QM-ESP-DES-MD5
[QM-ESP-DES-MD5-AH-MD5-SUITE]
Protocols= QM-ESP-DES-MD5,QM-AH-MD5
# Quick mode protocols
# DES
[QM-ESP-DES]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-DES-XF
[QM-ESP-DES-MD5]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-DES-MD5-XF
[QM-ESP-DES-MD5-PFS]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-DES-MD5-PFS-XF
[QM-ESP-DES-SHA]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-DES-SHA-XF
# 3DES
[QM-ESP-3DES-SHA]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-3DES-SHA-XF
[QM-ESP-3DES-SHA-PFS]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-3DES-SHA-PFS-XF
[QM-ESP-3DES-SHA-TRP]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-3DES-SHA-TRP-XF
# AES
[QM-ESP-AES-SHA]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-AES-SHA-XF
[QM-ESP-AES-SHA-PFS]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-AES-SHA-PFS-XF
[QM-ESP-AES-SHA-TRP]
PROTOCOL_ID= IPSEC_ESP
Transforms= QM-ESP-AES-SHA-TRP-XF
# AH MD5
[QM-AH-MD5]
PROTOCOL_ID= IPSEC_AH
Transforms= QM-AH-MD5-XF
[QM-AH-MD5-PFS]
PROTOCOL_ID= IPSEC_AH
Transforms= QM-AH-MD5-PFS-XF
# Quick mode transforms
# ESP DES+MD5
[QM-ESP-DES-XF]
TRANSFORM_ID= DES
ENCAPSULATION_MODE= TUNNEL
Life= Default-phase-2-lifetime
[QM-ESP-DES-MD5-XF]
TRANSFORM_ID= DES
ENCAPSULATION_MODE= TUNNEL
AUTHENTICATION_ALGORITHM= HMAC_MD5
Life= Default-phase-2-lifetime
[QM-ESP-DES-MD5-PFS-XF]
TRANSFORM_ID= DES
ENCAPSULATION_MODE= TUNNEL
GROUP_DESCRIPTION= MODP_1024
AUTHENTICATION_ALGORITHM= HMAC_MD5
Life= Default-phase-2-lifetime
[QM-ESP-DES-SHA-XF]
TRANSFORM_ID= DES
ENCAPSULATION_MODE= TUNNEL
AUTHENTICATION_ALGORITHM= HMAC_SHA
Life= Default-phase-2-lifetime
# 3DES
[QM-ESP-3DES-SHA-XF]
TRANSFORM_ID= 3DES
ENCAPSULATION_MODE= TUNNEL
AUTHENTICATION_ALGORITHM= HMAC_SHA
Life= Default-phase-2-lifetime
[QM-ESP-3DES-SHA-PFS-XF]
TRANSFORM_ID= 3DES
ENCAPSULATION_MODE= TUNNEL
AUTHENTICATION_ALGORITHM= HMAC_SHA
GROUP_DESCRIPTION= MODP_1024
Life= Default-phase-2-lifetime
[QM-ESP-3DES-SHA-TRP-XF]
TRANSFORM_ID= 3DES
ENCAPSULATION_MODE= TRANSPORT
AUTHENTICATION_ALGORITHM= HMAC_SHA
Life= Default-phase-2-lifetime
# AES
[QM-ESP-AES-SHA-XF]
TRANSFORM_ID= AES
ENCAPSULATION_MODE= TUNNEL
AUTHENTICATION_ALGORITHM= HMAC_SHA
KEY_LENGTH= 128
Life= Default-phase-2-lifetime
[QM-ESP-AES-SHA-PFS-XF]
TRANSFORM_ID= AES
ENCAPSULATION_MODE= TUNNEL
AUTHENTICATION_ALGORITHM= HMAC_SHA
GROUP_DESCRIPTION= MODP_1024
KEY_LENGTH= 128
Life= Default-phase-2-lifetime
[QM-ESP-AES-SHA-TRP-XF]
TRANSFORM_ID= AES
ENCAPSULATION_MODE= TRANSPORT
AUTHENTICATION_ALGORITHM= HMAC_SHA
KEY_LENGTH= 128
Life= Default-phase-2-lifetime
# AH
[QM-AH-MD5-XF]
TRANSFORM_ID= MD5
ENCAPSULATION_MODE= TUNNEL
AUTHENTICATION_ALGORITHM= HMAC_MD5
Life= Default-phase-2-lifetime
[QM-AH-MD5-PFS-XF]
TRANSFORM_ID= MD5
ENCAPSULATION_MODE= TUNNEL
GROUP_DESCRIPTION= MODP_1024
Life= Default-phase-2-lifetime
[Sample-Life-Time]
LIFE_TYPE= SECONDS
LIFE_DURATION= 3600,1800:7200
[Sample-Life-Volume]
LIFE_TYPE= KILOBYTES
LIFE_DURATION= 1000,768:1536
.Ed
.Sh SEE ALSO
.Xr keynote 1 ,
.Xr openssl 1 ,
.Xr ipsec 4 ,
.Xr keynote 4 ,
.Xr isakmpd.policy 5 ,
.Xr isakmpd 8 ,
.Xr vpn 8
.Sh CAVEATS
Using aggressive mode is discouraged due to various design problems.
If your peer only supports aggressive mode, please consider replacing that
peer with a sane ISAKMP/IKE implementation.
For details see
.Pa http://www.usenix.org/publications/login/1999-12/features/harmful.html .
.Sh BUGS
The RFCs do not permit differing DH groups in the same proposal for
aggressive and quick mode exchanges.
Mixing both PFS and non-PFS suites in a quick mode proposal is not possible,
as PFS implies using a DH group.
|