2 Section defining IKE connection configurations.
4 Section defining IKE connection configurations.
6 The connections section defines IKE connection configurations, each in
7 its own subsections. In the keyword description below, the connection
8 is named _<conn>_, but an arbitrary yet unique connection name can be
9 chosen for each connection subsection.
11 connections.<conn> { # }
12 Section for an IKE connection named <conn>.
14 connections.<conn>.version = 0
15 IKE major version to use for connection.
17 IKE major version to use for connection. _1_ uses IKEv1 aka ISAKMP, _2_
18 uses IKEv2. A connection using the default of _0_ accepts both IKEv1
19 and IKEv2 as responder, and initiates the connection actively with IKEv2.
21 connections.<conn>.local_addrs = %any
22 Local address(es) to use for IKE communication, comma separated.
24 Local address(es) to use for IKE communication, comma separated. Takes
25 single IPv4/IPv6 addresses, DNS names, CIDR subnets or IP address ranges.
27 As initiator, the first non-range/non-subnet is used to initiate the
28 connection from. As responder, the local destination address must match at
29 least to one of the specified addresses, subnets or ranges.
31 connections.<conn>.remote_addrs = %any
32 Remote address(es) to use for IKE communication, comma separated.
34 Remote address(es) to use for IKE communication, comma separated. Takes
35 single IPv4/IPv6 addresses, DNS names, CIDR subnets or IP address ranges.
37 As initiator, the first non-range/non-subnet is used to initiate the
38 connection to. As responder, the initiator source address must match at
39 least to one of the specified addresses, subnets or ranges.
41 To initiate a connection, at least one specific address or DNS name must
44 connections.<conn>.local_port = 500
45 Local UDP port for IKE communication.
47 Local UDP port for IKE communication. By default the port of the socket
48 backend is used, which is usually _500_. If port _500_ is used, automatic
49 IKE port floating to port 4500 is used to work around NAT issues.
51 Using a non-default local IKE port requires support from the socket backend
52 in use (socket-dynamic).
54 connections.<conn>.remote_port = 500
55 Remote UDP port for IKE communication.
57 Remote UDP port for IKE communication. If the default of port _500_ is used,
58 automatic IKE port floating to port 4500 is used to work around NAT issues.
60 connections.<conn>.proposals = default
61 Comma separated proposals to accept for IKE.
63 A proposal is a set of algorithms. For non-AEAD algorithms, this includes
64 for IKE an encryption algorithm, an integrity algorithm, a pseudo random
65 function and a Diffie-Hellman group. For AEAD algorithms, instead of
66 encryption and integrity algorithms, a combined algorithm is used.
68 In IKEv2, multiple algorithms of the same kind can be specified in a single
69 proposal, from which one gets selected. In IKEv1, only one algorithm per
70 kind is allowed per proposal, more algorithms get implicitly stripped. Use
71 multiple proposals to offer different algorithms combinations in IKEv1.
73 Algorithm keywords get separated using dashes. Multiple proposals may be
74 separated by commas. The special value _default_ forms a default proposal
75 of supported algorithms considered safe, and is usually a good choice
78 connections.<conn>.vips =
79 Virtual IPs to request in configuration payload / Mode Config.
81 Comma separated list of virtual IPs to request in IKEv2 configuration
82 payloads or IKEv1 Mode Config. The wildcard addresses _0.0.0.0_ and _::_
83 request an arbitrary address, specific addresses may be defined. The
84 responder may return a different address, though, or none at all.
86 connections.<conn>.aggressive = no
87 Use Aggressive Mode in IKEv1.
89 Enables Aggressive Mode instead of Main Mode with Identity Protection.
90 Aggressive Mode is considered less secure, because the ID and HASH
91 payloads are exchanged unprotected. This allows a passive attacker to
92 snoop peer identities, and even worse, start dictionary attacks on the
95 connections.<conn>.pull = yes
96 Set the Mode Config mode to use.
98 If the default of _yes_ is used, Mode Config works in pull mode, where
99 the initiator actively requests a virtual IP. With _no_, push mode is used,
100 where the responder pushes down a virtual IP to the initiating peer.
102 Push mode is currently supported for IKEv1, but not in IKEv2. It is used
103 by a few implementations only, pull mode is recommended.
105 connections.<conn>.dscp = 000000
106 Differentiated Services Field Codepoint to set on outgoing IKE packets (six
109 Differentiated Services Field Codepoint to set on outgoing IKE packets for
110 this connection. The value is a six digit binary encoded string specifying
111 the Codepoint to set, as defined in RFC 2474.
113 connections.<conn>.encap = no
114 Enforce UDP encapsulation by faking NAT-D payloads.
116 To enforce UDP encapsulation of ESP packets, the IKE daemon can fake the
117 NAT detection payloads. This makes the peer believe that NAT takes
118 place on the path, forcing it to encapsulate ESP packets in UDP.
120 Usually this is not required, but it can help to work around connectivity
121 issues with too restrictive intermediary firewalls.
123 connections.<conn>.mobike = yes
124 Enables MOBIKE on IKEv2 connections.
126 Enables MOBIKE on IKEv2 connections. MOBIKE is enabled by default on IKEv2
127 connections, and allows mobility of clients and multi-homing on servers by
128 migrating active IPsec tunnels.
130 Usually keeping MOBIKE enabled is unproblematic, as it is not used if the
131 peer does not indicate support for it. However, due to the design of MOBIKE,
132 IKEv2 always floats to port 4500 starting from the second exchange. Some
133 implementations don't like this behavior, hence it can be disabled.
135 connections.<conn>.dpd_delay = 0s
136 Interval of liveness checks (DPD).
138 Interval to check the liveness of a peer actively using IKEv2 INFORMATIONAL
139 exchanges or IKEv1 R_U_THERE messages. Active DPD checking is only enforced
140 if no IKE or ESP/AH packet has been received for the configured DPD delay.
142 connections.<conn>.dpd_timeout = 0s
143 Timeout for DPD checks (IKEV1 only).
145 Charon by default uses the normal retransmission mechanism and timeouts to
146 check the liveness of a peer, as all messages are used for liveness
147 checking. For compatibility reasons, with IKEv1 a custom interval may be
148 specified; this option has no effect on connections using IKE2.
150 connections.<conn>.fragmentation = yes
151 Use IKE UDP datagram fragmentation. (_yes_, _no_ or _force_).
153 Use IKE fragmentation (proprietary IKEv1 extension or RFC 7383 IKEv2
154 fragmentation). Acceptable values are _yes_ (the default), _force_ and
155 _no_. Fragmented IKE messages sent by a peer are always accepted
156 irrespective of the value of this option. If set to _yes_, and the peer
157 supports it, oversized IKE messages will be sent in fragments. If set to
158 _force_ (only supported for IKEv1) the initial IKE message will already
159 be fragmented if required.
161 connections.<conn>.send_certreq = yes
162 Send certificate requests payloads (_yes_ or _no_).
164 Send certificate request payloads to offer trusted root CA certificates
165 to the peer. Certificate requests help the peer to choose an appropriate
166 certificate/private key for authentication and are enabled by default.
168 Disabling certificate requests can be useful if too many trusted root CA
169 certificates are installed, as each certificate request increases the size
170 of the initial IKE packets.
172 connections.<conn>.send_cert = ifasked
173 Send certificate payloads (_always_, _never_ or _ifasked_).
175 Send certificate payloads when using certificate authentication. With the
176 default of _ifasked_ the daemon sends certificate payloads only if
177 certificate requests have been received. _never_ disables sending of
178 certificate payloads altogether, _always_ causes certificate payloads to be
179 sent unconditionally whenever certificate authentication is used.
181 connections.<conn>.keyingtries = 1
182 Number of retransmission sequences to perform during initial connect.
184 Number of retransmission sequences to perform during initial connect.
185 Instead of giving up initiation after the first retransmission sequence with
186 the default value of _1_, additional sequences may be started according to
187 the configured value. A value of _0_ initiates a new sequence until the
188 connection establishes or fails with a permanent error.
190 connections.<conn>.unique = no
191 Connection uniqueness policy (_never_, _no_, _keep_ or _replace_).
193 Connection uniqueness policy to enforce. To avoid multiple connections
194 from the same user, a uniqueness policy can be enforced. The value _never_
195 does never enforce such a policy, even if a peer included INITIAL_CONTACT
196 notification messages, whereas _no_ replaces existing connections for the
197 same identity if a new one has the INITIAL_CONTACT notify. _keep_ rejects
198 new connection attempts if the same user already has an active connection,
199 _replace_ deletes any existing connection if a new one for the same user
202 To compare connections for uniqueness, the remote IKE identity is used. If
203 EAP or XAuth authentication is involved, the EAP-Identity or XAuth username
204 is used to enforce the uniqueness policy instead.
206 On initiators this setting specifies whether an INITIAL_CONTACT notify is
207 sent during IKE_AUTH if no existing connection is found with the remote
208 peer (determined by the identities of the first authentication round).
209 Only if set to _keep_ or _replace_ will the client send a notify.
211 connections.<conn>.reauth_time = 0s
212 Time to schedule IKE reauthentication.
214 Time to schedule IKE reauthentication. IKE reauthentication recreates the
215 IKE/ISAKMP SA from scratch and re-evaluates the credentials. In asymmetric
216 configurations (with EAP or configuration payloads) it might not be possible
217 to actively reauthenticate as responder. The IKEv2 reauthentication lifetime
218 negotiation can instruct the client to perform reauthentication.
220 Reauthentication is disabled by default. Enabling it usually may lead
221 to small connection interruptions, as strongSwan uses a break-before-make
222 policy with IKEv2 to avoid any conflicts with associated tunnel resources.
224 connections.<conn>.rekey_time = 4h
225 Time to schedule IKE rekeying.
227 IKE rekeying refreshes key material using a Diffie-Hellman exchange, but
228 does not re-check associated credentials. It is supported in IKEv2 only,
229 IKEv1 performs a reauthentication procedure instead.
231 With the default value IKE rekeying is scheduled every 4 hours, minus the
232 configured **rand_time**. If a **reauth_time** is configured, **rekey_time**
233 defaults to zero disabling rekeying; explicitly set both to enforce
234 rekeying and reauthentication.
236 connections.<conn>.over_time = 10% of rekey_time/reauth_time
237 Hard IKE_SA lifetime if rekey/reauth does not complete, as time.
239 Hard IKE_SA lifetime if rekey/reauth does not complete, as time.
240 To avoid having an IKE/ISAKMP kept alive if IKE reauthentication or rekeying
241 fails perpetually, a maximum hard lifetime may be specified. If the
242 IKE_SA fails to rekey or reauthenticate within the specified time, the
245 In contrast to CHILD_SA rekeying, **over_time** is relative in time to the
246 **rekey_time** _and_ **reauth_time** values, as it applies to both.
248 The default is 10% of the longer of **rekey_time** and **reauth_time**.
250 connections.<conn>.rand_time = over_time
251 Range of random time to subtract from rekey/reauth times.
253 Time range from which to choose a random value to subtract from
254 rekey/reauth times. To avoid having both peers initiating the rekey/reauth
255 procedure simultaneously, a random time gets subtracted from the
258 The default is equal to the configured **over_time**.
260 connections.<conn>.pools =
261 Comma separated list of named IP pools.
263 Comma separated list of named IP pools to allocate virtual IP addresses and
264 other configuration attributes from. Each name references a pool by name
265 from either the **pools** section or an external pool.
267 connections.<conn>.local<suffix> {}
268 Section for a local authentication round.
270 Section for a local authentication round. A local authentication round
271 defines the rules how authentication is performed for the local peer.
272 Multiple rounds may be defined to use IKEv2 RFC 4739 Multiple Authentication
275 Each round is defined in a section having _local_ as prefix, and an optional
276 unique suffix. To define a single authentication round, the suffix may be
279 connections.<conn>.local<suffix>.round = 0
280 Optional numeric identifier by which authentication rounds are sorted. If
281 not specified rounds are ordered by their position in the config file/VICI
284 connections.<conn>.local<suffix>.certs =
285 Comma separated list of certificate candidates to use for authentication.
287 Comma separated list of certificate candidates to use for authentication.
288 The certificates may use a relative path from the **swanctl** _x509_
289 directory or an absolute path.
291 The certificate used for authentication is selected based on the received
292 certificate request payloads. If no appropriate CA can be located, the
293 first certificate is used.
295 connections.<conn>.local<suffix>.pubkeys =
296 Comma separated list of raw public key candidates to use for authentication.
298 Comma separated list of raw public key candidates to use for authentication.
299 The public keys may use a relative path from the **swanctl** _pubkey_
300 directory or an absolute path.
302 Even though multiple local public keys could be defined in principle, only
303 the first public key in the list is used for authentication.
305 connections.<conn>.local<suffix>.auth = pubkey
306 Authentication to perform locally (_pubkey_, _psk_, _xauth[-backend]_ or
309 Authentication to perform locally. _pubkey_ uses public key authentication
310 using a private key associated to a usable certificate. _psk_ uses
311 pre-shared key authentication. The IKEv1 specific _xauth_ is used for
312 XAuth or Hybrid authentication, while the IKEv2 specific _eap_ keyword
313 defines EAP authentication.
315 For _xauth_, a specific backend name may be appended, separated by a dash.
316 The appropriate _xauth_ backend is selected to perform the XAuth exchange.
317 For traditional XAuth, the _xauth_ method is usually defined in the second
318 authentication round following an initial _pubkey_ (or _psk_) round. Using
319 _xauth_ in the first round performs Hybrid Mode client authentication.
321 For _eap_, a specific EAP method name may be appended, separated by a dash.
322 An EAP module implementing the appropriate method is selected to perform
323 the EAP conversation.
325 If both peers support RFC 7427 ("Signature Authentication in IKEv2")
326 specific hash algorithms to be used during IKEv2 authentication may be
327 configured. To do so use _ike:_ followed by a trust chain signature scheme
328 constraint (see description of the **remote** section's **auth** keyword).
329 For example, with _ike:pubkey-sha384-sha256_ a public key signature scheme
330 with either SHA-384 or SHA-256 would get used for authentication, in that
331 order and depending on the hash algorithms supported by the peer. If no
332 specific hash algorithms are configured, the default is to prefer an
333 algorithm that matches or exceeds the strength of the signature key.
334 If no constraints with _ike:_ prefix are configured any signature scheme
335 constraint (without _ike:_ prefix) will also apply to IKEv2 authentication,
336 unless this is disabled in **strongswan.conf**(5).
338 connections.<conn>.local<suffix>.id =
339 IKE identity to use for authentication round.
341 IKE identity to use for authentication round. When using certificate
342 authentication, the IKE identity must be contained in the certificate,
343 either as subject or as subjectAltName.
345 The identity can be an IP address, a fully-qualified domain name, an email
346 address or a Distinguished Name for which the ID type is determined
347 automatically and the string is converted to the appropriate encoding. To
348 enforce a specific identity type, a prefix may be used, followed by a colon
349 (:). If the number sign (#) follows the colon, the remaining data is
350 interpreted as hex encoding, otherwise the string is used as-is as the
351 identification data. Note that this implies that no conversion is performed
352 for non-string identities. For example, _ipv4:10.0.0.1_ does not create a
353 valid ID_IPV4_ADDR IKE identity, as it does not get converted to binary
354 0x0a000001. Instead, one could use _ipv4:#0a000001_ to get a valid identity,
355 but just using the implicit type with automatic conversion is usually
356 simpler. The same applies to the ASN1 encoded types. The following prefixes
357 are known: _ipv4_, _ipv6_, _rfc822_, _email_, _userfqdn_, _fqdn_, _dns_,
358 _asn1dn_, _asn1gn_ and _keyid_. Custom type prefixes may be specified by
359 surrounding the numerical type value by curly brackets.
361 connections.<conn>.local<suffix>.eap_id = id
362 Client EAP-Identity to use in EAP-Identity exchange and the EAP method.
364 connections.<conn>.local<suffix>.aaa_id = remote-id
365 Server side EAP-Identity to expect in the EAP method.
367 Server side EAP-Identity to expect in the EAP method. Some EAP methods, such
368 as EAP-TLS, use an identity for the server to perform mutual authentication.
369 This identity may differ from the IKE identity, especially when EAP
370 authentication is delegated from the IKE responder to an AAA backend.
372 For EAP-(T)TLS, this defines the identity for which the server must provide
373 a certificate in the TLS exchange.
375 connections.<conn>.local<suffix>.xauth_id = id
376 Client XAuth username used in the XAuth exchange.
378 connections.<conn>.remote<suffix> {}
379 Section for a remote authentication round.
381 Section for a remote authentication round. A remote authentication round
382 defines the constraints how the peers must authenticate to use this
383 connection. Multiple rounds may be defined to use IKEv2 RFC 4739 Multiple
384 Authentication or IKEv1 XAuth.
386 Each round is defined in a section having _remote_ as prefix, and an
387 optional unique suffix. To define a single authentication round, the suffix
390 connections.<conn>.remote<suffix>.round = 0
391 Optional numeric identifier by which authentication rounds are sorted. If
392 not specified rounds are ordered by their position in the config file/VICI
395 connections.<conn>.remote<suffix>.id = %any
396 IKE identity to expect for authentication round.
398 IKE identity to expect for authentication round. Refer to the _local_ _id_
401 connections.<conn>.remote<suffix>.groups =
402 Authorization group memberships to require.
404 Comma separated authorization group memberships to require. The peer must
405 prove membership to at least one of the specified groups. Group membership
406 can be certified by different means, for example by appropriate Attribute
407 Certificates or by an AAA backend involved in the authentication.
409 connections.<conn>.remote<suffix>.cert_policy =
410 Certificate policy OIDs the peer's certificate must have.
412 Comma separated list of certificate policy OIDs the peer's certificate must
413 have. OIDs are specified using the numerical dotted representation.
415 connections.<conn>.remote<suffix>.certs =
416 Comma separated list of certificate to accept for authentication.
418 Comma separated list of certificates to accept for authentication.
419 The certificates may use a relative path from the **swanctl** _x509_
420 directory or an absolute path.
422 connections.<conn>.remote<suffix>.cacerts =
423 Comma separated list of CA certificates to accept for authentication.
425 Comma separated list of CA certificates to accept for authentication.
426 The certificates may use a relative path from the **swanctl** _x509ca_
427 directory or an absolute path.
429 connections.<conn>.remote<suffix>.pubkeys =
430 Comma separated list of raw public keys to accept for authentication.
432 Comma separated list of raw public keys to accept for authentication.
433 The public keys may use a relative path from the **swanctl** _pubkey_
434 directory or an absolute path.
436 connections.<conn>.remote<suffix>.revocation = relaxed
437 Certificate revocation policy, (_strict_, _ifuri_ or _relaxed_).
439 Certificate revocation policy for CRL or OCSP revocation.
441 A _strict_ revocation policy fails if no revocation information is
442 available, i.e. the certificate is not known to be unrevoked.
444 _ifuri_ fails only if a CRL/OCSP URI is available, but certificate
445 revocation checking fails, i.e. there should be revocation information
446 available, but it could not be obtained.
448 The default revocation policy _relaxed_ fails only if a certificate
449 is revoked, i.e. it is explicitly known that it is bad.
451 connections.<conn>.remote<suffix>.auth = pubkey
452 Authentication to expect from remote (_pubkey_, _psk_, _xauth[-backend]_ or
455 Authentication to expect from remote. See the **local** section's **auth**
456 keyword description about the details of supported mechanisms.
458 To require a trustchain public key strength for the remote side, specify the
459 key type followed by the minimum strength in bits (for example _ecdsa-384_
460 or _rsa-2048-ecdsa-256_). To limit the acceptable set of hashing algorithms
461 for trustchain validation, append hash algorithms to _pubkey_ or a key
462 strength definition (for example _pubkey-sha1-sha256_ or
463 _rsa-2048-ecdsa-256-sha256-sha384-sha512_).
464 Unless disabled in **strongswan.conf**(5), or explicit IKEv2 signature
465 constraints are configured (refer to the description of the **local**
466 section's **auth** keyword for details), such key types and hash algorithms
467 are also applied as constraints against IKEv2 signature authentication
468 schemes used by the remote side.
470 To specify trust chain constraints for EAP-(T)TLS, append a colon to the
471 EAP method, followed by the key type/size and hash algorithm as discussed
472 above (e.g. _eap-tls:ecdsa-384-sha384_).
474 connections.<conn>.children.<child> {}
475 CHILD_SA configuration sub-section.
477 CHILD_SA configuration sub-section. Each connection definition may have
478 one or more sections in its _children_ subsection. The section name
479 defines the name of the CHILD_SA configuration, which must be unique within
482 connections.<conn>.children.<child>.ah_proposals =
483 AH proposals to offer for the CHILD_SA.
485 AH proposals to offer for the CHILD_SA. A proposal is a set of algorithms.
486 For AH, this includes an integrity algorithm and an optional Diffie-Hellman
487 group. If a DH group is specified, CHILD_SA/Quick Mode rekeying and initial
488 negotiation uses a separate Diffie-Hellman exchange using the specified
489 group (refer to _esp_proposals_ for details).
491 In IKEv2, multiple algorithms of the same kind can be specified in a single
492 proposal, from which one gets selected. In IKEv1, only one algorithm per
493 kind is allowed per proposal, more algorithms get implicitly stripped. Use
494 multiple proposals to offer different algorithms combinations in IKEv1.
496 Algorithm keywords get separated using dashes. Multiple proposals may be
497 separated by commas. The special value _default_ forms a default proposal
498 of supported algorithms considered safe, and is usually a good choice
499 for interoperability. By default no AH proposals are included, instead ESP
502 connections.<conn>.children.<child>.esp_proposals = default
503 ESP proposals to offer for the CHILD_SA.
505 ESP proposals to offer for the CHILD_SA. A proposal is a set of algorithms.
506 For ESP non-AEAD proposals, this includes an integrity algorithm, an
507 encryption algorithm, an optional Diffie-Hellman group and an optional
508 Extended Sequence Number Mode indicator. For AEAD proposals, a combined
509 mode algorithm is used instead of the separate encryption/integrity
512 If a DH group is specified, CHILD_SA/Quick Mode rekeying and initial
513 negotiation use a separate Diffie-Hellman exchange using the specified
514 group. However, for IKEv2, the keys of the CHILD_SA created implicitly with
515 the IKE_SA will always be derived from the IKE_SA's key material. So any DH
516 group specified here will only apply when the CHILD_SA is later rekeyed or
517 is created with a separate CREATE_CHILD_SA exchange. A proposal mismatch
518 might, therefore, not immediately be noticed when the SA is established, but
519 may later cause rekeying to fail.
521 Extended Sequence Number support may be indicated with the _esn_ and _noesn_
522 values, both may be included to indicate support for both modes. If omitted,
525 In IKEv2, multiple algorithms of the same kind can be specified in a single
526 proposal, from which one gets selected. In IKEv1, only one algorithm per
527 kind is allowed per proposal, more algorithms get implicitly stripped. Use
528 multiple proposals to offer different algorithms combinations in IKEv1.
530 Algorithm keywords get separated using dashes. Multiple proposals may be
531 separated by commas. The special value _default_ forms a default proposal
532 of supported algorithms considered safe, and is usually a good choice
533 for interoperability. If no algorithms are specified for AH nor ESP,
534 the _default_ set of algorithms for ESP is included.
536 connections.<conn>.children.<child>.local_ts = dynamic
537 Local traffic selectors to include in CHILD_SA.
539 Comma separated list of local traffic selectors to include in CHILD_SA.
540 Each selector is a CIDR subnet definition, followed by an optional
541 proto/port selector. The special value _dynamic_ may be used instead of a
542 subnet definition, which gets replaced by the tunnel outer address or the
543 virtual IP, if negotiated. This is the default.
545 A protocol/port selector is surrounded by opening and closing square
546 brackets. Between these brackets, a numeric or **getservent**(3) protocol
547 name may be specified. After the optional protocol restriction, an optional
548 port restriction may be specified, separated by a slash. The port
549 restriction may be numeric, a **getservent**(3) service name, or the special
550 value _opaque_ for RFC 4301 OPAQUE selectors. Port ranges may be specified
551 as well, none of the kernel backends currently support port ranges, though.
553 Unless the Unity extension is used, IKEv1 supports the first specified
554 selector only. IKEv1 uses very similar traffic selector narrowing as it is
555 supported in the IKEv2 protocol.
557 connections.<conn>.children.<child>.remote_ts = dynamic
558 Remote selectors to include in CHILD_SA.
560 Comma separated list of remote selectors to include in CHILD_SA. See
561 **local_ts** for a description of the selector syntax.
563 connections.<conn>.children.<child>.rekey_time = 1h
564 Time to schedule CHILD_SA rekeying.
566 Time to schedule CHILD_SA rekeying. CHILD_SA rekeying refreshes key
567 material, optionally using a Diffie-Hellman exchange if a group is
568 specified in the proposal.
570 To avoid rekey collisions initiated by both ends simultaneously, a value
571 in the range of **rand_time** gets subtracted to form the effective soft
574 By default CHILD_SA rekeying is scheduled every hour, minus **rand_time**.
576 connections.<conn>.children.<child>.life_time = rekey_time + 10%
577 Maximum lifetime before CHILD_SA gets closed, as time.
579 Maximum lifetime before CHILD_SA gets closed. Usually this hard lifetime
580 is never reached, because the CHILD_SA gets rekeyed before.
581 If that fails for whatever reason, this limit closes the CHILD_SA.
583 The default is 10% more than the **rekey_time**.
585 connections.<conn>.children.<child>.rand_time = life_time - rekey_time
586 Range of random time to subtract from **rekey_time**.
588 Time range from which to choose a random value to subtract from
589 **rekey_time**. The default is the difference between **life_time** and
592 connections.<conn>.children.<child>.rekey_bytes = 0
593 Number of bytes processed before initiating CHILD_SA rekeying.
595 Number of bytes processed before initiating CHILD_SA rekeying. CHILD_SA
596 rekeying refreshes key material, optionally using a Diffie-Hellman exchange
597 if a group is specified in the proposal.
599 To avoid rekey collisions initiated by both ends simultaneously, a value
600 in the range of **rand_bytes** gets subtracted to form the effective soft
603 Volume based CHILD_SA rekeying is disabled by default.
605 connections.<conn>.children.<child>.life_bytes = rekey_bytes + 10%
606 Maximum bytes processed before CHILD_SA gets closed.
608 Maximum bytes processed before CHILD_SA gets closed. Usually this hard
609 volume limit is never reached, because the CHILD_SA gets rekeyed before.
610 If that fails for whatever reason, this limit closes the CHILD_SA.
612 The default is 10% more than **rekey_bytes**.
614 connections.<conn>.children.<child>.rand_bytes = life_bytes - rekey_bytes
615 Range of random bytes to subtract from **rekey_bytes**.
617 Byte range from which to choose a random value to subtract from
618 **rekey_bytes**. The default is the difference between **life_bytes** and
621 connections.<conn>.children.<child>.rekey_packets = 0
622 Number of packets processed before initiating CHILD_SA rekeying.
624 Number of packets processed before initiating CHILD_SA rekeying. CHILD_SA
625 rekeying refreshes key material, optionally using a Diffie-Hellman exchange
626 if a group is specified in the proposal.
628 To avoid rekey collisions initiated by both ends simultaneously, a value
629 in the range of **rand_packets** gets subtracted to form the effective soft
632 Packet count based CHILD_SA rekeying is disabled by default.
634 connections.<conn>.children.<child>.life_packets = rekey_packets + 10%
635 Maximum number of packets processed before CHILD_SA gets closed.
637 Maximum number of packets processed before CHILD_SA gets closed. Usually
638 this hard packets limit is never reached, because the CHILD_SA gets rekeyed
639 before. If that fails for whatever reason, this limit closes the CHILD_SA.
641 The default is 10% more than **rekey_bytes**.
643 connections.<conn>.children.<child>.rand_packets = life_packets - rekey_packets
644 Range of random packets to subtract from **packets_bytes**.
646 Packet range from which to choose a random value to subtract from
647 **rekey_packets**. The default is the difference between **life_packets**
648 and **rekey_packets**.
650 connections.<conn>.children.<child>.updown =
651 Updown script to invoke on CHILD_SA up and down events.
653 connections.<conn>.children.<child>.hostaccess = yes
654 Hostaccess variable to pass to **updown** script.
656 connections.<conn>.children.<child>.mode = tunnel
657 IPsec Mode to establish (_tunnel_, _transport_, _transport_proxy_, _beet_,
660 IPsec Mode to establish CHILD_SA with. _tunnel_ negotiates the CHILD_SA
661 in IPsec Tunnel Mode, whereas _transport_ uses IPsec Transport Mode.
662 _transport_proxy_ signifying the special Mobile IPv6 Transport Proxy Mode.
663 _beet_ is the Bound End to End Tunnel mixture mode, working with fixed inner
664 addresses without the need to include them in each packet.
666 Both _transport_ and _beet_ modes are subject to mode negotiation; _tunnel_
667 mode is negotiated if the preferred mode is not available.
669 _pass_ and _drop_ are used to install shunt policies which explicitly
670 bypass the defined traffic from IPsec processing or drop it, respectively.
672 connections.<conn>.children.<child>.policies = yes
673 Whether to install IPsec policies or not.
675 Whether to install IPsec policies or not. Disabling this can be useful in
676 some scenarios e.g. MIPv6, where policies are not managed by the IKE daemon.
678 connections.<conn>.children.<child>.policies_fwd_out = no
679 Whether to install outbound FWD IPsec policies or not.
681 Whether to install outbound FWD IPsec policies or not. Enabling this is
682 required in case there is a drop policy that would match and block forwarded
683 traffic for this CHILD_SA.
685 connections.<conn>.children.<child>.dpd_action = clear
686 Action to perform on DPD timeout (_clear_, _trap_ or _restart_).
688 Action to perform for this CHILD_SA on DPD timeout. The default _clear_
689 closes the CHILD_SA and does not take further action. _trap_ installs
690 a trap policy, which will catch matching traffic and tries to re-negotiate
691 the tunnel on-demand. _restart_ immediately tries to re-negotiate the
692 CHILD_SA under a fresh IKE_SA.
694 connections.<conn>.children.<child>.ipcomp = no
695 Enable IPComp compression before encryption.
697 Enable IPComp compression before encryption. If enabled, IKE tries to
698 negotiate IPComp compression to compress ESP payload data prior to
701 connections.<conn>.children.<child>.inactivity = 0s
702 Timeout before closing CHILD_SA after inactivity.
704 Timeout before closing CHILD_SA after inactivity. If no traffic has
705 been processed in either direction for the configured timeout, the CHILD_SA
706 gets closed due to inactivity. The default value of _0_ disables inactivity
709 connections.<conn>.children.<child>.reqid = 0
710 Fixed reqid to use for this CHILD_SA.
712 Fixed reqid to use for this CHILD_SA. This might be helpful in some
713 scenarios, but works only if each CHILD_SA configuration is instantiated
714 not more than once. The default of _0_ uses dynamic reqids, allocated
717 connections.<conn>.children.<child>.priority = 0
718 Optional fixed priority for IPsec policies.
720 Optional fixed priority for IPsec policies. This could be useful to install
721 high-priority drop policies. The default of _0_ uses dynamically calculated
722 priorities based on the size of the traffic selectors.
724 connections.<conn>.children.<child>.interface =
725 Optional interface name to restrict IPsec policies.
727 connections.<conn>.children.<child>.mark_in = 0/0x00000000
728 Netfilter mark and mask for input traffic.
730 Netfilter mark and mask for input traffic. On Linux Netfilter may require
731 marks on each packet to match an SA having that option set. This allows
732 Netfilter rules to select specific tunnels for incoming traffic. The
733 special value _%unique_ sets a unique mark on each CHILD_SA instance.
735 An additional mask may be appended to the mark, separated by _/_. The
736 default mask if omitted is 0xffffffff.
738 connections.<conn>.children.<child>.mark_out = 0/0x00000000
739 Netfilter mark and mask for output traffic.
741 Netfilter mark and mask for output traffic. On Linux Netfilter may require
742 marks on each packet to match a policy having that option set. This allows
743 Netfilter rules to select specific tunnels for outgoing traffic. The
744 special value _%unique_ sets a unique mark on each CHILD_SA instance.
746 An additional mask may be appended to the mark, separated by _/_. The
747 default mask if omitted is 0xffffffff.
749 connections.<conn>.children.<child>.tfc_padding = 0
750 Traffic Flow Confidentiality padding.
752 Pads ESP packets with additional data to have a consistent ESP packet size
753 for improved Traffic Flow Confidentiality. The padding defines the minimum
754 size of all ESP packets sent.
756 The default value of 0 disables TFC padding, the special value _mtu_ adds
757 TFC padding to create a packet size equal to the Path Maximum Transfer Unit.
759 connections.<conn>.children.<child>.replay_window = 32
760 IPsec replay window to configure for this CHILD_SA.
762 IPsec replay window to configure for this CHILD_SA. Larger values than the
763 default of 32 are supported using the Netlink backend only, a value of 0
764 disables IPsec replay protection.
766 connections.<conn>.children.<child>.start_action = none
767 Action to perform after loading the configuration (_none_, _trap_, _start_).
769 Action to perform after loading the configuration. The default of _none_
770 loads the connection only, which then can be manually initiated or used as
771 a responder configuration.
773 The value _trap_ installs a trap policy, which triggers the tunnel as soon
774 as matching traffic has been detected. The value _start_ initiates
775 the connection actively.
777 When unloading or replacing a CHILD_SA configuration having a
778 **start_action** different from _none_, the inverse action is performed.
779 Configurations with _start_ get closed, while such with _trap_ get
782 connections.<conn>.children.<child>.close_action = none
783 Action to perform after a CHILD_SA gets closed (_none_, _trap_, _start_).
785 Action to perform after a CHILD_SA gets closed by the peer. The default of
786 _none_ does not take any action, _trap_ installs a trap policy for the
787 CHILD_SA. _start_ tries to re-create the CHILD_SA.
789 **close_action** does not provide any guarantee that the CHILD_SA is kept
790 alive. It acts on explicit close messages only, but not on negotiation
791 failures. Use trap policies to reliably re-create failed CHILD_SAs.
794 Section defining secrets for IKE/EAP/XAuth authentication and private
797 Section defining secrets for IKE/EAP/XAuth authentication and private key
798 decryption. The **secrets** section takes sub-sections having a specific
799 prefix which defines the secret type.
801 It is not recommended to define any private key decryption passphrases,
802 as then there is no real security benefit in having encrypted keys. Either
803 store the key unencrypted or enter the keys manually when loading
806 secrets.eap<suffix> { # }
807 EAP secret section for a specific secret.
809 EAP secret section for a specific secret. Each EAP secret is defined in
810 a unique section having the _eap_ prefix. EAP secrets are used for XAuth
811 authentication as well.
813 secrets.xauth<suffix> { # }
814 XAuth secret section for a specific secret.
816 XAuth secret section for a specific secret. **xauth** is just an alias
817 for **eap**, secrets under both section prefixes are used for both EAP and
818 XAuth authentication.
820 secrets.eap<suffix>.secret =
821 Value of the EAP/XAuth secret.
823 Value of the EAP/XAuth secret. It may either be an ASCII string, a hex
824 encoded string if it has a _0x_ prefix or a Base64 encoded string if it
825 has a _0s_ prefix in its value.
827 secrets.eap<suffix>.id<suffix> =
828 Identity the EAP/XAuth secret belongs to.
830 Identity the EAP/XAuth secret belongs to. Multiple unique identities may
831 be specified, each having an _id_ prefix, if a secret is shared between
834 secrets.ntlm<suffix> { # }
835 NTLM secret section for a specific secret.
837 NTLM secret section for a specific secret. Each NTLM secret is defined in
838 a unique section having the _ntlm_ prefix. NTLM secrets may only be used for
839 EAP-MSCHAPv2 authentication.
841 secrets.ntlm<suffix>.secret =
842 Value of the NTLM secret.
844 Value of the NTLM secret, which is the NT Hash of the actual secret, that
845 is, MD4(UTF-16LE(secret)). The resulting 16-byte value may either be given
846 as a hex encoded string with a _0x_ prefix or as a Base64 encoded string
849 secrets.ntlm<suffix>.id<suffix> =
850 Identity the NTLM secret belongs to.
852 Identity the NTLM secret belongs to. Multiple unique identities may
853 be specified, each having an _id_ prefix, if a secret is shared between
856 secrets.ike<suffix> { # }
857 IKE preshared secret section for a specific secret.
859 IKE preshared secret section for a specific secret. Each IKE PSK is defined
860 in a unique section having the _ike_ prefix.
862 secrets.ike<suffix>.secret =
863 Value of the IKE preshared secret.
865 Value of the IKE preshared secret. It may either be an ASCII string,
866 a hex encoded string if it has a _0x_ prefix or a Base64 encoded string if
867 it has a _0s_ prefix in its value.
869 secrets.ike<suffix>.id<suffix> =
870 IKE identity the IKE preshared secret belongs to.
872 IKE identity the IKE preshared secret belongs to. Multiple unique identities
873 may be specified, each having an _id_ prefix, if a secret is shared between
876 secrets.private<suffix> { # }
877 Private key decryption passphrase for a key in the _private_ folder.
879 secrets.private<suffix>.file =
880 File name in the _private_ folder for which this passphrase should be used.
882 secrets.private<suffix>.secret
883 Value of decryption passphrase for private key.
885 secrets.rsa<suffix> { # }
886 Private key decryption passphrase for a key in the _rsa_ folder.
888 secrets.rsa<suffix>.file =
889 File name in the _rsa_ folder for which this passphrase should be used.
891 secrets.rsa<suffix>.secret
892 Value of decryption passphrase for RSA key.
894 secrets.ecdsa<suffix> { # }
895 Private key decryption passphrase for a key in the _ecdsa_ folder.
897 secrets.ecdsa<suffix>.file =
898 File name in the _ecdsa_ folder for which this passphrase should be used.
900 secrets.ecdsa<suffix>.secret
901 Value of decryption passphrase for ECDSA key.
903 secrets.pkcs8<suffix> { # }
904 Private key decryption passphrase for a key in the _pkcs8_ folder.
906 secrets.pkcs8<suffix>.file =
907 File name in the _pkcs8_ folder for which this passphrase should be used.
909 secrets.pkcs8<suffix>.secret
910 Value of decryption passphrase for PKCS#8 key.
912 secrets.pkcs12<suffix> { # }
913 PKCS#12 decryption passphrase for a container in the _pkcs12_ folder.
915 secrets.pkcs12<suffix>.file =
916 File name in the _pkcs12_ folder for which this passphrase should be used.
918 secrets.pkcs12<suffix>.secret
919 Value of decryption passphrase for PKCS#12 container.
921 secrets.token<suffix> { # }
922 Definition for a private key that's stored on a token/smartcard.
924 secrets.token<suffix>.handle =
925 Hex-encoded CKA_ID of the private key on the token.
927 secrets.token<suffix>.slot =
928 Optional slot number to access the token.
930 secrets.token<suffix>.module =
931 Optional PKCS#11 module name to access the token.
933 secrets.token<suffix>.pin =
934 Optional PIN required to access the key on the token. If none is provided
935 the user is prompted during an interactive --load-creds call.
938 Section defining named pools.
940 Section defining named pools. Named pools may be referenced by connections
941 with the **pools** option to assign virtual IPs and other configuration
945 Section defining a single pool with a unique name.
948 Addresses allocated in pool.
950 Subnet or range defining addresses allocated in pool. Accepts a single CIDR
951 subnet defining the pool to allocate addresses from or an address range
952 (<from>-<to>). Pools must be unique and non-overlapping.
954 pools.<name>.<attr> =
955 Comma separated list of additional attributes from type <attr>.
957 Comma separated list of additional attributes of type **<attr>**. The
958 attribute type may be one of _dns_, _nbns_, _dhcp_, _netmask_, _server_,
959 _subnet_, _split_include_ and _split_exclude_ to define addresses or CIDR
960 subnets for the corresponding attribute types. Alternatively, **<attr>** can
961 be a numerical identifier, for which string attribute values are accepted
965 Section defining attributes of certification authorities.
967 authorities.<name> { # }
968 Section defining a certification authority with a unique name.
970 authorities.<name>.cacert =
971 CA certificate belonging to the certification authority.
973 The certificates may use a relative path from the **swanctl** _x509ca_
974 directory or an absolute path.
976 authorities.<name>.crl_uris =
977 Comma-separated list of CRL distribution points
979 Comma-separated list of CRL distribution points (ldap, http, or file URI)
981 authorities.<name>.ocsp_uris =
982 Comma-separated list of OCSP URIs
984 Comma-separated list of OCSP URIs
986 authorities.<name>.cert_uri_base =
987 Defines the base URI for the Hash and URL feature supported by IKEv2.
989 Defines the base URI for the Hash and URL feature supported by IKEv2.
990 Instead of exchanging complete certificates, IKEv2 allows one to send an
991 URI that resolves to the DER encoded certificate. The certificate URIs are
992 built by appending the SHA1 hash of the DER encoded certificates to this