Project

General

Profile

ipsec.conf: conn Reference » History » Version 84

Tobias Brunner, 18.10.2016 13:51
Updated for 5.5.1

1 50 Tobias Brunner
{{title(ipsec.conf: conn Reference)}}
2 49 Tobias Brunner
3 49 Tobias Brunner
h1. ipsec.conf: conn <name>
4 1 Martin Willi
5 44 Tobias Brunner
{{>toc}}
6 1 Martin Willi
7 44 Tobias Brunner
h2. General Connection Parameters
8 21 Andreas Steffen
9 36 Andreas Steffen
_aaa_identity = <id>_
10 36 Andreas Steffen
11 36 Andreas Steffen
p((. defines the identity of the AAA backend used during IKEv2 EAP authentication. This is required if
12 36 Andreas Steffen
     the EAP client uses a method that verifies the server identity (such as EAP-TLS), but it does not
13 36 Andreas Steffen
     match the IKEv2 gateway identity.
14 36 Andreas Steffen
15 68 Tobias Brunner
_ah = <cipher suites>_
16 68 Tobias Brunner
17 68 Tobias Brunner
p((. comma-separated list of AH algorithms to be used for the connection, e.g. _sha1-sha256-modp1024_.
18 68 Tobias Brunner
     The notation is integrity[-dhgroup]. For IKEv2, multiple algorithms (separated by -) of the same type
19 68 Tobias Brunner
     can be included in a single proposal. IKEv1 only includes the first algorithm in a proposal.
20 68 Tobias Brunner
     Only either the *ah* or the *esp* keyword may be used, AH+ESP bundles are not supported.
21 68 Tobias Brunner
22 76 Tobias Brunner
p((. There is no default AH cipher suite since by default ESP is used. The daemon adds its extensive default
23 76 Tobias Brunner
     proposal to the configured value. To restrict it to the configured proposal an exclamation mark (!) can
24 76 Tobias Brunner
     be added at the end.
25 83 Tobias Brunner
     *Note:* As a responder, the daemon defaults to selecting the first configured proposal that's also
26 83 Tobias Brunner
     supported by the peer. By disabling _charon.prefer_configured_proposals_ in [[strongswan.conf]] this may
27 83 Tobias Brunner
     be changed to selecting the first acceptable proposal sent by the peer instead.
28 83 Tobias Brunner
     In order to restrict a responder to only accept specific cipher suites, the strict flag (!, exclamation mark)
29 1 Martin Willi
     can be used, e.g: sha256-sha512-modp2048!
30 68 Tobias Brunner
31 83 Tobias Brunner
p((. If dh-group is specified, CHILD_SA/Quick Mode setup and rekeying include a separate Diffe-Hellman
32 83 Tobias Brunner
     exchange (refer to _esp_ for details).
33 68 Tobias Brunner
34 68 Tobias Brunner
p((. Refer to [[IKEv1CipherSuites]] and [[IKEv2CipherSuites]] for a list of valid keywords.
35 68 Tobias Brunner
36 68 Tobias Brunner
p((. Available since [[5.1.1]].
37 68 Tobias Brunner
38 58 Tobias Brunner
_aggressive = yes | *no*_
39 58 Tobias Brunner
40 58 Tobias Brunner
p((. whether to use IKEv1 Aggressive or Main Mode (the default). Available since [[5.0.0]].
41 58 Tobias Brunner
42 80 Tobias Brunner
_also = <name>_
43 1 Martin Willi
44 80 Tobias Brunner
p((. includes conn section <name>. Some aspects of this changed with version:5.2.0 (refer to [[IpsecConf#Reusing-Existing-Parameters]] for details).
45 80 Tobias Brunner
46 1 Martin Willi
47 58 Tobias Brunner
_authby = *pubkey* | rsasig | ecdsasig | psk | secret | xauthrsasig | xauthpsk | never_
48 24 Andreas Steffen
49 31 Martin Willi
p((. how the two security gateways should authenticate each other; acceptable values are *secret* or *psk*
50 58 Tobias Brunner
     for pre-shared secrets, *pubkey* (the default) for public key signatures as well as the synonyms *rsasig*
51 58 Tobias Brunner
     for RSA digital signatures and *ecdsasig* for Elliptic Curve DSA signatures.
52 58 Tobias Brunner
     *never*  can be used if negotiation is never to be attempted or accepted (useful for shunt-only conns).
53 58 Tobias Brunner
     Digital signatures are superior in every way to shared secrets. IKEv1 additionally supports the values
54 58 Tobias Brunner
     *xauthpsk* and *xauthrsasig* that will enable _eXtended Authentication (XAuth)_ in addition to IKEv1 main
55 58 Tobias Brunner
     mode based on shared secrets or digital RSA signatures,  respectively.
56 58 Tobias Brunner
     This parameter is deprecated for IKEv2 connections (and IKEv1 connections since [[5.0.0]]), as two peers
57 58 Tobias Brunner
     do not need to agree on an authentication method. Use the _left|rightauth_ parameter instead to define
58 58 Tobias Brunner
     authentication methods.
59 1 Martin Willi
60 31 Martin Willi
_auto = *ignore* | add | route | start_
61 23 Tobias Brunner
62 1 Martin Willi
p((. what operation, if any, should be done automatically at IPsec startup. *add* loads a connection without
63 21 Andreas Steffen
     starting it. *route* loads a connection and installs kernel traps. If traffic is detected between
64 21 Andreas Steffen
     _leftsubnet_ and _rightsubnet_, a connection is established. *start* loads a connection and brings
65 58 Tobias Brunner
     it up immediately. *ignore* ignores the connection. This is equal to deleting a connection from the config
66 57 Tobias Brunner
     file. Relevant only locally, other end need not agree on it.
67 1 Martin Willi
68 23 Tobias Brunner
_closeaction = *none* | clear | hold | restart_
69 47 Tobias Brunner
70 47 Tobias Brunner
p((. defines the action to take if the remote peer unexpectedly closes a CHILD_SA (IKEv2 only, see _dpdaction_ for
71 47 Tobias Brunner
     meaning of values). A _closeaction_ should not be used if the peer uses reauthentication or uniqueids checking,
72 57 Tobias Brunner
     as these events might trigger the defined action when not desired.
73 47 Tobias Brunner
74 23 Tobias Brunner
_compress = yes | *no*_
75 31 Martin Willi
76 23 Tobias Brunner
p((. whether IPComp compression of content is proposed on the connection (link-level compression does not work on
77 57 Tobias Brunner
     encrypted data, so to be effective, compression must be done before encryption). A value of *yes* causes the daemon
78 57 Tobias Brunner
     to propose both compressed and  uncompressed, and  prefer compressed. A value of *no* prevents the daemon from proposing or accepting compression.
79 1 Martin Willi
80 21 Andreas Steffen
_dpdaction = *none* | clear | hold | restart_
81 21 Andreas Steffen
82 21 Andreas Steffen
p((. controls the use of the Dead Peer Detection protocol (DPD, RFC 3706) where R_U_THERE notification messages
83 1 Martin Willi
     (IKEv1) or empty INFORMATIONAL messages (IKEv2) are periodically sent in order to check the liveliness of the
84 81 Tobias Brunner
     IPsec peer. The values *clear*, *hold*, and *restart* all activate DPD and determine the action to perform on a timeout.
85 81 Tobias Brunner
     With *clear* the connection is closed with no further actions taken. *hold* installs a trap policy, which will catch
86 81 Tobias Brunner
     matching traffic and tries to re-negotiate the connection on demand. *restart* will immediately trigger an attempt
87 81 Tobias Brunner
     to re-negotiate the connection. The default is *none* which disables the active sending of DPD messages.
88 21 Andreas Steffen
89 21 Andreas Steffen
_dpddelay = *30s* | <time>_
90 41 Tobias Brunner
91 1 Martin Willi
p((. defines  the  period time interval with which R_U_THERE messages/INFORMATIONAL exchanges are sent to the peer.
92 31 Martin Willi
     These are only sent if no other traffic is received. In IKEv2, a value of 0 sends no additional INFORMATIONAL
93 1 Martin Willi
     messages and uses only standard messages (such as those to rekey) to detect dead peers.
94 30 Martin Willi
95 31 Martin Willi
_dpdtimeout = *150s* | <time>_
96 30 Martin Willi
97 54 Andreas Steffen
p((. defines the timeout interval, after which all connections to a peer are deleted in case of inactivity.
98 23 Tobias Brunner
     This only applies to IKEv1, in IKEv2 the default [[Retransmission|retransmission timeout]] applies, as every exchange is used to
99 41 Tobias Brunner
     detect dead peers.
100 1 Martin Willi
101 1 Martin Willi
_inactivity = <time>_
102 65 Andreas Steffen
103 1 Martin Willi
p((. defines the timeout interval, after which a CHILD_SA is closed if it did not send or receive any traffic.
104 41 Tobias Brunner
     Not supported for IKEv1 connections prior to [[5.0.0]].
105 1 Martin Willi
106 23 Tobias Brunner
_eap_identity = <id>_
107 1 Martin Willi
108 31 Martin Willi
p((. defines the identity the client uses to reply to an EAP Identity request. If defined on the EAP server, the defined
109 23 Tobias Brunner
     identity  will be used as peer identity during EAP authentication. The special value _%identity_ uses the EAP Identity method
110 14 Martin Willi
     to ask the client for a EAP identity. If not defined, the IKEv2 identity will be used as EAP identity.
111 1 Martin Willi
112 1 Martin Willi
_esp = <cipher suites>_
113 57 Tobias Brunner
114 48 Tobias Brunner
p((. comma-separated list of ESP encryption/authentication algorithms to be used for the connection, e.g.
115 1 Martin Willi
     _aes128-sha256_. The notation is _encryption-integrity[-dhgroup][-esnmode]_.
116 68 Tobias Brunner
     For IKEv2, multiple algorithms (separated by -) of the same type can be included in a single proposal.
117 68 Tobias Brunner
     IKEv1 only includes the first algorithm in a proposal.  Only either the *ah* or the *esp* keyword may
118 1 Martin Willi
     be used, AH+ESP bundles are not supported.
119 1 Martin Willi
120 1 Martin Willi
p((. Defaults to *aes128-sha256* (_aes128-sha1,3des-sha1_ before version:5.4.0). The daemon adds its extensive default
121 1 Martin Willi
     proposal to this default or the configured value. To restrict it to the configured proposal an exclamation mark (*&#33;*)
122 1 Martin Willi
     can be added at the end.
123 83 Tobias Brunner
     *Note:* As a responder, the daemon defaults to selecting the first configured proposal that's also
124 83 Tobias Brunner
     supported by the peer. By disabling _charon.prefer_configured_proposals_ in [[strongswan.conf]] this may
125 83 Tobias Brunner
     be changed to selecting the first acceptable proposal sent by the peer instead.
126 83 Tobias Brunner
     In order to restrict a responder to only accept specific cipher suites, the strict flag (*&#33;*, exclamation mark)
127 1 Martin Willi
     can be used, e.g: _aes256-sha512-modp4096!_
128 1 Martin Willi
129 83 Tobias Brunner
p((. If _dh-group_ is specified, CHILD_SA rekeying and initial negotiation include a separate Diffe-Hellman
130 83 Tobias Brunner
     exchange (since [[5.0.0]] this also applies to IKEv1 Quick Mode). However, for IKEv2, the keys of the CHILD_SA
131 83 Tobias Brunner
     created implicitly with the IKE_SA will always be derived from the IKE_SA's key material. So any DH group
132 83 Tobias Brunner
     specified here will only apply when the CHILD_SA is later rekeyed or is created with a separate CREATE_CHILD_SA
133 83 Tobias Brunner
     exchange.  Therefore, a proposal mismatch might not immediately be noticed when the SA is established,
134 83 Tobias Brunner
     but may later cause rekeying to fail.
135 68 Tobias Brunner
136 83 Tobias Brunner
p((. Valid values for _esnmode_ are _esn_ and _noesn_.  Specifying both negotiates extended sequence
137 48 Tobias Brunner
     number support with the peer, the default is *noesn*.
138 1 Martin Willi
139 68 Tobias Brunner
p((. Refer to [[IKEv1CipherSuites]] and [[IKEv2CipherSuites]] for a list of valid keywords.
140 68 Tobias Brunner
141 1 Martin Willi
_forceencaps = yes | *no*_
142 48 Tobias Brunner
143 48 Tobias Brunner
p((.  force UDP encapsulation for ESP packets even if no NAT situation is detected.
144 43 Tobias Brunner
      This may help to surmount restrictive firewalls. In order to force the peer to
145 57 Tobias Brunner
      encapsulate packets, NAT detection payloads are faked.
146 65 Andreas Steffen
      Not supported for IKEv1 connections prior to [[5.0.0]].
147 1 Martin Willi
148 84 Tobias Brunner
_fragmentation = *yes* | force | no_
149 60 Tobias Brunner
150 74 Tobias Brunner
p((.  whether to use IKE fragmentation (proprietary IKEv1 extension or IKEv2 fragmentation as per "RFC 7383":http://tools.ietf.org/html/rfc7383).
151 74 Tobias Brunner
      Fragmented messages sent by a peer are always accepted irrespective of the value of this option.
152 84 Tobias Brunner
      If set to *yes* (the default since version:5.5.1) and the peer supports it, larger IKE messages will be sent in fragments (the
153 84 Tobias Brunner
      maximum fragment size can be configured in [[strongswan.conf]]). If set to *force* (only supported for IKEv1) the initial
154 84 Tobias Brunner
      IKE message will already be fragmented if required.
155 74 Tobias Brunner
      Available for IKEv1 connections since version:5.0.2 and for IKEv2 connections since version:5.2.1.
156 60 Tobias Brunner
157 31 Martin Willi
_ike = <cipher suites>_
158 1 Martin Willi
159 1 Martin Willi
p((. comma-separated list of IKE/ISAKMP SA encryption/authentication algorithms to be used, e.g.
160 82 Tobias Brunner
     _aes128-sha256-modp3072_. The notation is _encryption-integrity[-prf]-dhgroup_. In IKEv2, multiple algorithms
161 82 Tobias Brunner
     and proposals may be included, such as _aes128-aes256-sha1-modp3072-modp2048,3des-sha1-md5-modp1024_.
162 59 Tobias Brunner
     
163 1 Martin Willi
p((. The ability to configure a PRF algorithm different to that defined for integrity protection was added with [[5.0.2]].
164 59 Tobias Brunner
     If no PRF is configured, the algorithms defined for integrity are proposed as PRF.  The prf keywords are the same as
165 59 Tobias Brunner
     the integrity algorithms, but have a _prf_ prefix (such as _prfsha1_, _prfsha256_ or _prfaesxcbc_).
166 59 Tobias Brunner
167 82 Tobias Brunner
p((. Defaults to *aes128-sha256-modp3072* (_aes128-sha1-modp2048,3des-sha1-modp1536_ before version:5.4.0) for IKEv1.
168 82 Tobias Brunner
     The daemon adds its extensive default proposal to this default or the configured value. To restrict it to the
169 82 Tobias Brunner
     configured proposal an exclamation mark (*&#33;*) can be added at the end.
170 59 Tobias Brunner
     Refer to [[IKEv1CipherSuites]] and [[IKEv2CipherSuites]] for a list of valid keywords.
171 59 Tobias Brunner
     
172 59 Tobias Brunner
p((. *Note*: As a responder both daemons accept the first supported proposal received from the peer. In order
173 51 Tobias Brunner
     to restrict a responder to only accept specific cipher suites, the strict flag (*&#33;*, exclamation mark)
174 48 Tobias Brunner
     can be used, e.g: _aes256-sha512-modp4096!_
175 51 Tobias Brunner
176 62 Tobias Brunner
_ikedscp = *000000* | <DSCP field>_
177 62 Tobias Brunner
178 62 Tobias Brunner
p((. Differentiated Services Field Codepoint to set on outgoing IKE packets sent
179 62 Tobias Brunner
     from this connection. The value is a six digit binary encoded string defining
180 62 Tobias Brunner
     the Codepoint to set, as defined in "RFC 2474":http://tools.ietf.org/html/rfc2474.
181 62 Tobias Brunner
182 48 Tobias Brunner
_ikelifetime = *3h* | <time>_
183 43 Tobias Brunner
184 58 Tobias Brunner
p((. how long the keying channel of a connection (_ISAKMP or IKE SA_) should last before being renegotiated.
185 58 Tobias Brunner
     Also see [[ExpiryRekey|Expiry and Rekey]].
186 31 Martin Willi
187 40 Tobias Brunner
_installpolicy = *yes* | no_
188 1 Martin Willi
189 58 Tobias Brunner
p((. decides whether IPsec policies are installed in the kernel by the charon daemon for a given connection.
190 31 Martin Willi
     Allows peaceful cooperation e.g. with the Mobile IPv6  _mip6d_ daemon who wants to control the kernel policies.
191 23 Tobias Brunner
192 21 Andreas Steffen
_keyexchange = *ike* | ikev1 | ikev2_
193 1 Martin Willi
194 23 Tobias Brunner
p((. method of key exchange; which protocol should be used to initialize the connection.
195 58 Tobias Brunner
     Prior to [[5.0.0]] connections marked with *ikev1*  were initiated with Pluto, those marked with *ikev2* with Charon.
196 58 Tobias Brunner
     An incoming request from the remote peer was handled by the correct daemon, unaffected from the _keyexchange_ setting.
197 57 Tobias Brunner
     Starting with strongSwan [[4.5.0]] the default value *ike* is a synonym for *ikev2*, whereas in older strongSwan releases *ikev1* was assumed.
198 57 Tobias Brunner
     Since [[5.0.0]] both protocols are handled by Charon and connections marked with *ike* will use IKEv2 when initiating, but accept any protocol version when responding.
199 38 Andreas Steffen
200 38 Andreas Steffen
_keyingtries = *3* | <number> | %forever_
201 20 Andreas Steffen
202 45 Tobias Brunner
p((. how  many attempts (a positive integer or _%forever_) should be made to negotiate a connection, or a replacement
203 31 Martin Willi
     for one, before giving up (default 3). The value _%forever_ means 'never give up'.  Relevant  only  locally, other end need
204 46 Daniel Mentz
     not agree on it.
205 45 Tobias Brunner
206 1 Martin Willi
_keylife_
207 26 Tobias Brunner
208 31 Martin Willi
p((. synonym for _lifetime_.
209 26 Tobias Brunner
210 26 Tobias Brunner
_lifebytes = <number>_
211 31 Martin Willi
212 65 Andreas Steffen
p((. the number of bytes transmitted over an IPsec SA before it expires. Not supported for IKEv1 connections prior to [[5.0.0]].
213 26 Tobias Brunner
214 26 Tobias Brunner
_lifepackets = <number>_
215 1 Martin Willi
216 65 Andreas Steffen
p((. the number of packets transmitted over an IPsec SA before it expires. Not supported for IKEv1 connections prior to [[5.0.0]].
217 1 Martin Willi
218 31 Martin Willi
_lifetime = *1h* | <time>_
219 26 Tobias Brunner
220 31 Martin Willi
p((. how  long  a  particular  instance  of a connection (a set of encryption/authentication keys for user packets)
221 1 Martin Willi
     should last, from successful negotiation to expiry; acceptable values are an integer optionally followed by
222 1 Martin Willi
     _s_ (a time in seconds) or a decimal number followed by _m_, _h_, or _d_ (a time in minutes, hours,
223 21 Andreas Steffen
     or days respectively) (default _1h_, maximum _24h_).  Normally, the connection is renegotiated (via the
224 1 Martin Willi
     keying  channel) before it expires (see _margintime_).  The two ends need not exactly agree on _lifetime_, although if they
225 1 Martin Willi
     do not, there will be some clutter of superseded connections on the end which thinks the lifetime is longer.
226 1 Martin Willi
     Also see [[ExpiryRekey|Expiry and Rekey]].
227 40 Tobias Brunner
228 1 Martin Willi
_marginbytes = <number>_
229 26 Tobias Brunner
230 57 Tobias Brunner
p((. how many bytes before IPsec SA expiry (see _lifebytes_) should attempts to negotiate a replacement begin.
231 26 Tobias Brunner
232 26 Tobias Brunner
_marginpackets = <number>_
233 26 Tobias Brunner
234 57 Tobias Brunner
p((. how many packets before IPsec SA expiry (see _lifepackets_) should attempts to negotiate a replacement begin.
235 26 Tobias Brunner
236 40 Tobias Brunner
_margintime = *9m* | <time>_
237 1 Martin Willi
238 1 Martin Willi
p((. how long before connection expiry or keying-channel expiry should attempts to negotiate a replacement begin; acceptable values
239 26 Tobias Brunner
     as for _lifetime_ (default _9m_).  Relevant only locally, other end need not agree on it. Also see [[ExpiryRekey|Expiry and Rekey]].
240 35 Andreas Steffen
241 35 Andreas Steffen
_mark = <value>[/<mask>]_
242 37 Tobias Brunner
243 35 Andreas Steffen
p((. sets  an XFRM mark in the inbound and outbound IPsec SAs and policies. If the mask is missing then
244 75 Tobias Brunner
     a default mask of *0xffffffff* is assumed. Since version:5.3.0 the special value *%unique* assigns a unique
245 75 Tobias Brunner
     value to each newly created IPsec SA (used e.g. in combination with the [[forecast]] or [[connmark]] plugins).
246 35 Andreas Steffen
247 57 Tobias Brunner
_mark_in = <value>[/<mask>]_
248 1 Martin Willi
249 1 Martin Willi
p((. sets an XFRM mark in the inbound IPsec SA and policy. If the mask is missing then
250 57 Tobias Brunner
     a default mask of *0xffffffff* is assumed.
251 57 Tobias Brunner
252 39 Gerd v. Egidy
_mark_out = <value>[/<mask>]_
253 35 Andreas Steffen
254 1 Martin Willi
p((. sets an XFRM mark in the outbound IPsec SA and policy. If the mask is missing then
255 23 Tobias Brunner
     a default mask of *0xffffffff* is assumed.
256 31 Martin Willi
257 21 Andreas Steffen
_mobike = *yes* | no_
258 1 Martin Willi
259 1 Martin Willi
p((. enables the IKEv2 [[MobIke|MOBIKE]] protocol defined by RFC 4555. If set to *no*, the charon
260 23 Tobias Brunner
     daemon will not actively propose [[MobIke|MOBIKE]] as initiator and ignore the MOBIKE_SUPPORTED
261 31 Martin Willi
     notify as responder.
262 23 Tobias Brunner
263 57 Tobias Brunner
_modeconfig = push | *pull*_
264 21 Andreas Steffen
265 1 Martin Willi
p((. defines which mode is used to assign a virtual IP. Currently relevant for IKEv1 only since IKEv2 always uses
266 1 Martin Willi
     the configuration payload in *pull* mode. Cisco VPN gateways usually operate in *push* mode.
267 70 Tobias Brunner
     In versions prior to [[5.1.1]] the charon daemon did not support *push* mode.
268 57 Tobias Brunner
269 21 Andreas Steffen
_reauth = *yes* | no_
270 31 Martin Willi
271 20 Andreas Steffen
p((. whether rekeying of an IKE_SA should also reauthenticate the peer. In IKEv1, reauthentication is always done.
272 1 Martin Willi
     In  IKEv2, a value of *no* rekeys without uninstalling the IPsec SAs, a value of *yes* (the default)
273 23 Tobias Brunner
     creates a new IKE_SA from scratch and tries to recreate all IPsec SAs.
274 23 Tobias Brunner
275 1 Martin Willi
_rekey = *yes* | no_
276 1 Martin Willi
277 1 Martin Willi
p((. whether a connection should be renegotiated when it is about to expire. The two ends need not agree, but
278 1 Martin Willi
     while a value of no prevents the daemon from requesting renegotiation, it does not prevent responding
279 58 Tobias Brunner
     to renegotiation requested from the other end, so no will be largely ineffective unless both ends agree on it.
280 58 Tobias Brunner
     Also see _reauth_.
281 1 Martin Willi
282 1 Martin Willi
_rekeyfuzz = *100%* | <percentage>_
283 1 Martin Willi
284 31 Martin Willi
p((. maximum percentage by which _marginbytes_, _marginpackets_ and _margintime_ should be randomly increased to randomize
285 1 Martin Willi
     rekeying intervals (important for hosts with many connections); acceptable values are an integer, which may exceed 100,
286 4 Martin Willi
     followed  by  a '%' .
287 77 Juergen Seifert
     The value of _marginTYPE_, after this random increase, must not exceed _lifeTYPE_ (where TYPE is one of bytes, packets or time).
288 31 Martin Willi
     The value _0%_ will suppress randomization. Relevant only locally, other end need not agree on it.
289 1 Martin Willi
     Also see [[ExpiryRekey|Expiry and Rekey]].
290 1 Martin Willi
291 1 Martin Willi
_rekeymargin_
292 1 Martin Willi
293 1 Martin Willi
p((.  synonym for _margintime_.
294 1 Martin Willi
295 71 Tobias Brunner
_replay_window = -1 | <number>_
296 71 Tobias Brunner
297 71 Tobias Brunner
p((. The  IPsec  replay  window  size  for  this connection. With the default of -1 the value configured with _charon.replay_window_  in
298 71 Tobias Brunner
     [[strongswan.conf]]  is used. Larger values than 32 are supported using the Netlink backend only, a  value  of  0  disables  IPsec
299 71 Tobias Brunner
     replay protection. Available since [[5.2.0]].
300 71 Tobias Brunner
301 1 Martin Willi
_reqid = <number>_
302 57 Tobias Brunner
303 26 Tobias Brunner
p((. sets the reqid for a given connection to a pre-configured fixed value.
304 57 Tobias Brunner
305 1 Martin Willi
_tfc = <value>_
306 57 Tobias Brunner
307 57 Tobias Brunner
p((. number of bytes to pad ESP payload data to. Traffic Flow Confidentiality is currently supported in IKEv2 and applies to outgoing packets only. The special value %mtu fills up ESP packets with padding to have the size of the MTU.
308 57 Tobias Brunner
309 57 Tobias Brunner
_type = *tunnel* | transport | transport_proxy | passthrough | drop_
310 1 Martin Willi
311 1 Martin Willi
p((. the type of the connection; currently the accepted values are *tunnel*, signifying a  host-to-host,
312 1 Martin Willi
     host-to-subnet, or subnet-to-subnet tunnel; *transport*, signifying host-to-host transport mode;
313 31 Martin Willi
     *transport_proxy*, signifying the special Mobile IPv6 transport proxy mode;
314 23 Tobias Brunner
     *passthrough*, signifying that no IPsec processing should be done at all; *drop*, signifying that packets
315 41 Tobias Brunner
     should be  discarded.
316 34 Tobias Brunner
317 57 Tobias Brunner
_xauth = *client* | server_
318 21 Andreas Steffen
319 1 Martin Willi
p((. specifies the role in the XAuth protocol if activated by _authby=xauthpsk_ or _authby=xauthrsasig_.
320 21 Andreas Steffen
321 23 Tobias Brunner
_xauth_identity = <id>_
322 20 Andreas Steffen
323 53 Tobias Brunner
p((. defines the identity/username the client uses to reply to an XAuth request. If not defined, the IKEv1 identity will be used as XAuth identity.
324 23 Tobias Brunner
325 20 Andreas Steffen
h2. left|right End Parameters
326 1 Martin Willi
327 1 Martin Willi
Connection descriptions are defined in terms of a left endpoint and a right endpoint. For example, the
328 1 Martin Willi
two parameters leftid and rightid specify the identity of the left and the right endpoint. For every
329 52 Tobias Brunner
connection description an attempt is made to figure out whether the local endpoint should act as the left or
330 52 Tobias Brunner
the right endpoint. This is done by matching the IP addresses defined for both endpoints with the
331 1 Martin Willi
IP addresses assigned to local network interfaces. If a match is found then the role (left or right) that
332 1 Martin Willi
matches is going to be considered "local". If no match is found during startup, "left" is considered "local".
333 1 Martin Willi
334 70 Tobias Brunner
_left|right = <ip address> | <fqdn> | *%any* | range | subnet_
335 52 Tobias Brunner
336 70 Tobias Brunner
p((. The IP address of the participant's public-network interface or one of several magic values.
337 57 Tobias Brunner
     The value _%any_ for the local endpoint signifies an address to be filled in
338 52 Tobias Brunner
     (by automatic keying) during negotiation. If the local peer initiates the connection setup the routing table
339 23 Tobias Brunner
     will be queried to determine the correct local IP address. In case the local peer is responding to a connection
340 1 Martin Willi
     setup then any IP address that is assigned to a local interface will be accepted.
341 1 Martin Willi
342 58 Tobias Brunner
p((. Prior to [[5.0.0]] specifying _%%any_ for the local endpoint was not supported for IKEv1 connections, instead
343 58 Tobias Brunner
     the keyword _%%defaultroute_ could be used, causing the value to be filled in automatically with the local
344 58 Tobias Brunner
     address of the default-route interface (as determined at IPsec startup time and during configuration
345 57 Tobias Brunner
     update). Either left or right may be _%defaultroute_, but not both.
346 57 Tobias Brunner
347 1 Martin Willi
p((. The prefix % in front of a fully-qualified domain name or an IP address will implicitly set _left|rightallowany=yes_.
348 1 Martin Willi
          
349 1 Martin Willi
p((. If _%any_ is used for the remote endpoint it literally means any IP address.
350 70 Tobias Brunner
351 70 Tobias Brunner
p((. Since [[5.1.1]] connections can be limited to a specific range of hosts. To do so a range (10.1.0.0-10.2.255.255)
352 70 Tobias Brunner
     or a subnet (10.1.0.0/16) can be specified, and multiple addresses, ranges and subnets can be separated by commas.
353 70 Tobias Brunner
     While one can freely combine these items, to initiate the connection at least one non-range/subnet is required.
354 1 Martin Willi
     
355 31 Martin Willi
p((. Please note that with the usage of wildcards multiple connection descriptions might match a given incoming
356 33 Tobias Brunner
     connection attempt. The most specific description is used in that case.
357 33 Tobias Brunner
358 33 Tobias Brunner
_left|rightallowany = yes | *no*_
359 1 Martin Willi
360 29 Daniel Mentz
p((. a modifier for _left|right_, making it behave as _%any_ although a concrete IP address has been
361 1 Martin Willi
     assigned. Recommended for dynamic IP addresses that can be resolved by DynDNS at IPsec startup or update time.
362 1 Martin Willi
363 1 Martin Willi
_left|rightauth = <auth method>_
364 1 Martin Willi
365 1 Martin Willi
p((. Authentication method to use locally (left) or require from the remote (right) side. Acceptable values are *pubkey*
366 1 Martin Willi
     for public key encryption (RSA/ECDSA), *psk* for pre-shared key authentication, *eap* to [require the] use of the Extensible Authentication Protocol, and *xauth* for IKEv1 eXtended Authentication.
367 1 Martin Willi
368 1 Martin Willi
p((. To require a trustchain public key strength for the remote side, specify the key type followed
369 1 Martin Willi
     by the minimum strength in bits (for example *ecdsa-384* or *rsa-2048-ecdsa-256*).
370 75 Tobias Brunner
     To limit the acceptable set of hashing algorithms for trustchain validation, append hash algorithms
371 75 Tobias Brunner
     to *pubkey* or a key strength definition (for example *pubkey-sha1-sha256* or *rsa-2048-ecdsa-256-sha256-sha384-sha512*).
372 82 Tobias Brunner
     Since version:5.3.0 and unless disabled in [[strongswan.conf]], or explicit IKEv2 signature constraints are
373 82 Tobias Brunner
     configured (see below), such key types and hash algorithms are also applied as constraints against IKEv2 signature
374 82 Tobias Brunner
     authentication schemes used by the remote side.
375 1 Martin Willi
376 1 Martin Willi
p((. Since version:5.3.0 and if both peers support "RFC 7427":http://tools.ietf.org/html/rfc7427 ("Signature  Authentication in IKEv2") specific hash
377 82 Tobias Brunner
     algorithms to be used during IKEv2 authentication may be configured. The syntax is the same as above,
378 82 Tobias Brunner
     but with _ike:_ prefix (before version:5.4.0 without that prefix).
379 82 Tobias Brunner
     For  example, with _ike:pubkey-sha384-sha256_ a public key signature scheme with either SHA-384 or SHA-256
380 75 Tobias Brunner
     would get used for authentication, in that order and depending on the hash algorithms supported by the peer.
381 75 Tobias Brunner
     If no specific hash algorithms are  configured, the default is to prefer an algorithm that matches or exceeds
382 75 Tobias Brunner
     the strength of the signature key.
383 82 Tobias Brunner
     If no constraints with _ike:_ prefix are configured any signature scheme constraint (without _ike:_ prefix) will
384 82 Tobias Brunner
     also apply to IKEv2 authentication, unless this is disabled in [[strongswan.conf]] (this is also the behavior before
385 82 Tobias Brunner
     version:5.4.0, which introduced the _ike:_ prefix).
386 75 Tobias Brunner
387 75 Tobias Brunner
p((. In the case of *eap*, an optional EAP method can be appended. Currently defined methods are *eap-aka*,
388 1 Martin Willi
     *eap-gtc*, *eap-md5*, *eap-mschapv2*, *eap-peap*, *eap-sim*, *eap-tls*, *eap-ttls*, *eap-dynamic*, and *eap-radius*.
389 75 Tobias Brunner
     Alternatively, IANA assigned EAP method numbers are accepted. Vendor specific EAP methods are defined
390 75 Tobias Brunner
     in the form *eap-type-vendor* (e.g. *eap-7-12345*).
391 75 Tobias Brunner
     Since version:5.3.0 signature and trust chain constraints for EAP-(T)TLS may be defined.  To do so, append a
392 75 Tobias Brunner
     colon to the EAP method, followed by the key type/size and hash algorithm as discussed above.
393 75 Tobias Brunner
     For *xauth*, an XAuth authentication backend can be specified, such as *xauth-generic* or *xauth-eap*.
394 75 Tobias Brunner
     If XAuth is used in _leftauth_, Hybrid authentication is used. For traditional XAuth authentication, define XAuth in _leftauth2_.
395 1 Martin Willi
396 57 Tobias Brunner
p((. Not supported for IKEv1 connections prior to [[5.0.0]].
397 27 Daniel Mentz
398 33 Tobias Brunner
399 58 Tobias Brunner
_left|rightauth2 = <auth method>_
400 58 Tobias Brunner
401 58 Tobias Brunner
p((. Same as _left|rightauth_, but defines an additional authentication exchange. In IKEv1, only XAuth can be used
402 57 Tobias Brunner
     in the second authentication round. IKEv2 supports multiple complete authentication rounds using
403 66 Andreas Steffen
     _Multiple Authentication Exchanges_ defined in "RFC 4739":http://tools.ietf.org/html/rfc4739. This allows e.g. a separate authentication of host and user.
404 7 Martin Willi
405 31 Martin Willi
p((. Not supported for IKEv1 connections prior to [[5.0.0]].
406 57 Tobias Brunner
    
407 23 Tobias Brunner
408 57 Tobias Brunner
_left|rightca = <issuer dn> | %same_
409 57 Tobias Brunner
410 58 Tobias Brunner
p((. the distinguished name of a certificate authority which is required to lie in the trust path going from the
411 56 Andreas Steffen
     _left|right_ participant's certificate up to the root certification authority.
412 1 Martin Willi
     *%same* means that the value configured for the other participant should be reused.
413 56 Andreas Steffen
414 23 Tobias Brunner
_left|rightca2 = <issuer dn> | %same_
415 21 Andreas Steffen
416 1 Martin Willi
p((. Same as _left|rightca_ but for the second authentication (IKev2 only).
417 1 Martin Willi
418 1 Martin Willi
_left|rightcert = <path>_
419 1 Martin Willi
420 23 Tobias Brunner
p((. the path to the left|right participant's X.509 certificate. The file can be coded either in PEM or DER format.
421 58 Tobias Brunner
     OpenPGP certificates are supported as well.  Both absolute paths or paths relative to
422 58 Tobias Brunner
     [[IpsecDirectoryCerts|/etc/ipsec.d/certs]] are accepted. By default _left|rightcert_ sets _left|rightid_
423 31 Martin Willi
     to the distinguished name of the certificate's subject. The _left|right_ participant's ID can be overridden
424 61 Tobias Brunner
     by specifying a _left|rightid_ value which must be certified by the certificate, though.
425 61 Tobias Brunner
426 61 Tobias Brunner
p((. Since [[5.0.2]] certificates can be configured in the form _%smartcard[<slot nr>[@<module>]]:<keyid>_, which
427 61 Tobias Brunner
     defines a specific certificate to load from a PKCS#11 backend for this connection (e.g. via the [[PKCS11Plugin|pkcs11 plugin]]).
428 61 Tobias Brunner
     See [[PinSecret|ipsec.secrets]] for details about smartcard definitions.
429 61 Tobias Brunner
     Defining a certificate on a smartcard with _left|rightcert_ is only required if the automatic selection via _left|rightid_
430 64 Tobias Brunner
     is not sufficient, for example, if multiple certificates use the same subject.
431 64 Tobias Brunner
432 64 Tobias Brunner
p((. Since [[5.0.3]] multiple certificate paths or PKCS#11 backends can be specified in a comma separated list.
433 64 Tobias Brunner
     The daemon chooses the certificate based on the received certificate requests, if possible, before enforcing
434 23 Tobias Brunner
     the first.
435 23 Tobias Brunner
436 57 Tobias Brunner
_left|rightcert2 = <path>_
437 21 Andreas Steffen
438 1 Martin Willi
p((. Same as _left|rightcert_ but for the second authentication round (IKEv2 only).
439 33 Tobias Brunner
440 7 Martin Willi
_left|rightcertpolicy = <OIDs>_
441 66 Andreas Steffen
442 1 Martin Willi
p((. Comma separated list of certificate policy OIDs the peer's certificate must have.
443 58 Tobias Brunner
     OIDs are specified using the numerical dotted representation. Not supported for IKEv1 connections prior to [[5.0.0]].
444 58 Tobias Brunner
445 58 Tobias Brunner
_left|rightdns = <servers>_
446 58 Tobias Brunner
447 58 Tobias Brunner
p((. Comma separated list of DNS server addresses to exchange as configuration attributes. On the initiator,
448 58 Tobias Brunner
     a server is a fixed IPv4/IPv6 address, or _%config4/%config6_ to request attributes without an address.
449 58 Tobias Brunner
     On the responder, only fixed IPv4/IPv6 addresses are allowed and define DNS servers assigned to the client.
450 1 Martin Willi
     Available since [[5.0.1]].
451 23 Tobias Brunner
452 1 Martin Willi
_left|rightfirewall = yes | *no*_
453 1 Martin Willi
454 1 Martin Willi
p((. whether the _left|right_ participant is doing forwarding-firewalling (including  masquerading)
455 1 Martin Willi
     using iptables for traffic from _left|rightsubnet_, which should be turned off for traffic to the
456 1 Martin Willi
     other subnet) once the connection is established. May not be used in the same connection description with
457 1 Martin Willi
     _left|rightupdown_. Implemented as a parameter to the default _ipsec _updown_ script. Relevant only
458 1 Martin Willi
     locally, other end need not agree on it.
459 23 Tobias Brunner
460 20 Andreas Steffen
p((. If one or  both security gateways are doing forwarding firewalling (possibly including masquerading),
461 23 Tobias Brunner
     and this is specified using the firewall parameters, tunnels  established with  IPsec  are exempted from
462 57 Tobias Brunner
     it so that packets can flow unchanged through the tunnels. (This means that all subnets connected in this
463 1 Martin Willi
     manner must have distinct, non-overlapping subnet address blocks.)  This is done by the default 
464 1 Martin Willi
     _ipsec _updown_ script.
465 1 Martin Willi
466 1 Martin Willi
p((. In situations calling for more control, it may be preferable for the user to supply his own _updown_ script,
467 1 Martin Willi
     which makes the appropriate adjustments for his system.
468 1 Martin Willi
469 31 Martin Willi
_left|rightgroups = <group list>_
470 58 Tobias Brunner
471 58 Tobias Brunner
p((. a comma-separated list of group names. If the _left|rightgroups_ parameter is present then the peer must
472 57 Tobias Brunner
     be a member of at least one of the groups defined by the parameter. Groups may be used together with the
473 58 Tobias Brunner
     [[EapRadius#Group-selection|eap-radius]] plugin.
474 1 Martin Willi
475 58 Tobias Brunner
_left|rightgroups2 = <group list>_
476 58 Tobias Brunner
477 58 Tobias Brunner
p((. Same as _left|rightgroups_ but for the second authentication round defined with _left|rightauth2_.
478 1 Martin Willi
     Available since [[5.0.1]].
479 1 Martin Willi
480 1 Martin Willi
_left|righthostaccess = yes | *no*_
481 1 Martin Willi
482 1 Martin Willi
p((. inserts a pair of INPUT and OUTPUT iptables rules using the default _ipsec _updown_ script,
483 33 Tobias Brunner
     thus allowing access to the host itself in the case where the host's internal interface is part
484 23 Tobias Brunner
     of the negotiated client subnet. 
485 57 Tobias Brunner
486 73 Tobias Brunner
_left|rightid = <id>_
487 73 Tobias Brunner
488 79 Tobias Brunner
p((. how the _left|right_ participant should be identified for authentication; defaults to _left|right_ or the subject of the
489 79 Tobias Brunner
     certificate configured with _left|rightcert_.  If _left|rightcert_ is configured the identity has to be confirmed by the
490 79 Tobias Brunner
     certificate, that is, it has to match the full subject DN or one of the subjectAltName extensions contained in the
491 79 Tobias Brunner
     certificate.
492 1 Martin Willi
493 79 Tobias Brunner
p((. Can be an IP address, a fully-qualified domain name, an email address or a Distinguished Name for which the
494 79 Tobias Brunner
     ID type is determined automatically and the string is converted to the appropriate encoding. The rules for this
495 79 Tobias Brunner
     conversion are described on [[IdentityParsing]].  In versions before [[5.0.0]] fully-qualified domain names can be
496 79 Tobias Brunner
     preceded by an @ to avoid them being resolved to an IP address.
497 73 Tobias Brunner
498 79 Tobias Brunner
p((. In certain special situations the identity parsing above might be inadequate or produce the wrong result.
499 79 Tobias Brunner
     Examples are the need to encode a FQDN as KEY_ID or the string parser being unable to produce the correct
500 79 Tobias Brunner
     binary ASN.1 encoding of a certificate's DN. For these situations it is possible since version:5.2.2 to enforce a specific
501 79 Tobias Brunner
     identity type and to provide the binary encoding of the identity.  To do this a prefix may be used, followed by a
502 79 Tobias Brunner
     colon (:). If the number sign (#) follows the colon, the remaining data is interpreted as hex encoding, otherwise
503 79 Tobias Brunner
     the string is used as is as the identification data. *Note:* The latter implies that no conversion is performed for
504 79 Tobias Brunner
     non-string identities. For example, _ipv4:10.0.0.1_ does not create a valid ID_IPV4_ADDR IKE identity, as it does not
505 79 Tobias Brunner
     get converted to binary 0x0a000001. Instead, one could use _ipv4:#0a000001_ to get a valid identity, but just using
506 79 Tobias Brunner
     the implicit type with [[IdentityParsing|automatic conversion]] is usually simpler. The same applies to the ASN.1 encoded types.
507 58 Tobias Brunner
     The following prefixes are known: _ipv4, ipv6, rfc822, email, userfqdn, fqdn, dns, asn1dn, asn1gn_ and _keyid_.
508 58 Tobias Brunner
     Custom type prefixes may be specified by surrounding the numerical type value with curly brackets.
509 58 Tobias Brunner
510 58 Tobias Brunner
p((. Since [[5.0.1]] _rightid_ for IKEv2 connections optionally takes a % as prefix in front of the identity.
511 58 Tobias Brunner
     If given it prevents the daemon from sending IDr in its IKE_AUTH request and will allow it to verify the 
512 58 Tobias Brunner
     configured identity against the subject and subjectAltNames contained in the responder's certificate (otherwise,
513 33 Tobias Brunner
     it is only compared with the IDr returned by the responder). The IDr sent by the initiator might otherwise 
514 7 Martin Willi
     prevent the responder from finding a config if it has configured a different value for _leftid_.
515 23 Tobias Brunner
516 23 Tobias Brunner
_left|rightid2 = <id>_
517 21 Andreas Steffen
518 1 Martin Willi
p((. Identity to use for the second authentication of the left participant (IKEv2 only).
519 1 Martin Willi
     Defaults to _left|rightid_.
520 1 Martin Willi
521 1 Martin Willi
_leftikeport = <port>_
522 58 Tobias Brunner
523 58 Tobias Brunner
p((. UDP port the left participant uses for IKE communication. If unspecified, port 500 is used with the port
524 63 Tobias Brunner
     floating to 4500 if a NAT is detected or MOBIKE is enabled.
525 63 Tobias Brunner
     Specifying a local IKE port different from the default additionally requires a socket implementation that
526 63 Tobias Brunner
     listens to this port. Not supported for IKEv1 connections prior to [[5.0.0]].
527 70 Tobias Brunner
528 70 Tobias Brunner
_left|rightprotoport = <protocol>/<port>_
529 67 Tobias Brunner
530 1 Martin Willi
p((. restrict the traffic selector to a single protocol and/or port.  Since [[5.1.0]] this option is deprecated
531 1 Martin Willi
     as protocol/port information can be defined for each subnet directly in _left|rightsubnet_.
532 67 Tobias Brunner
533 67 Tobias Brunner
_left|rightrsasigkey = <raw rsa public key> | <path to public key>_
534 72 Tobias Brunner
535 1 Martin Willi
p((. Since [[5.1.0]] a synonym for _left|rightsigkey_. Before that it denoted the left|right participant's public key
536 67 Tobias Brunner
for RSA signature authentication, in RFC 2537 format using hex (0x prefix) or base64 (0s prefix) encoding.
537 67 Tobias Brunner
Also accepted was the path to a file containing the public key in PEM or DER encoding.
538 72 Tobias Brunner
539 1 Martin Willi
_left|rightsigkey = <raw public key> | <path to public key>_
540 72 Tobias Brunner
541 67 Tobias Brunner
p((. Added with [[5.1.0]]. The left|right participant's public key for public key signature authentication, in PKCS#1
542 72 Tobias Brunner
format using  using hex (0x prefix) or base64 (0s prefix) encoding. With the optional _dns:_ or _ssh:_ prefix in front
543 72 Tobias Brunner
of 0x or 0s, the public key is expected in either the RFC 3110 (not the full RR, only the RSA key part) or
544 1 Martin Willi
RFC 4253 public key format, respectively.
545 1 Martin Willi
Also accepted is the path to a file containing the public key in PEM, DER or SSH encoding. Both absolute paths or
546 1 Martin Willi
paths relative to [[ipsecdirectorycerts|/etc/ipsec.d/certs]] are accepted.
547 58 Tobias Brunner
548 1 Martin Willi
_left|rightsendcert = never | no | *ifasked* | always | yes_
549 58 Tobias Brunner
550 58 Tobias Brunner
p((. Accepted values are *never* or *no*, *always* or *yes*, and *ifasked*, the latter meaning that 
551 58 Tobias Brunner
     the peer must send a certificate request (CR) payload in order to get a certificate in return.
552 58 Tobias Brunner
553 58 Tobias Brunner
_leftsourceip = %config4 | %config6 | <ip address>_
554 31 Martin Willi
555 23 Tobias Brunner
p((. The internal source IP to use in a tunnel, also known as [[VirtualIp|virtual IP]].
556 1 Martin Willi
     If the value is one of the synonyms _%config_, _%cfg_, _%modeconfig_ or _%modecfg_, an address (from
557 57 Tobias Brunner
     the tunnel address family) is requested from the peer.
558 1 Martin Willi
     Since [[5.0.1]] a comma-separated list is accepted to request multiple addresses, and with _%config4_ and
559 1 Martin Willi
     _%config6_ an address of the given address family will be requested explicitly.
560 73 Tobias Brunner
     If an IP address is configured, it will be requested from the responder, which is free to respond with a
561 7 Martin Willi
     different address.
562 23 Tobias Brunner
563 31 Martin Willi
_rightsourceip = %config | <network>/<netmask> | <from>-<to> | %poolname_
564 73 Tobias Brunner
565 73 Tobias Brunner
p((. The internal source IP to use in a tunnel for the remote peer. If the value is %config on the responder
566 1 Martin Willi
     side, the initiator must propose an address which is then echoed back. Also supported are address pools
567 73 Tobias Brunner
     expressed as _<network>/<netmask>_ and _<from>-<to>_ (since version:5.2.2) or the use of an external IP address pool
568 57 Tobias Brunner
     using _%%poolname_ where _poolname_ is the name of the IP address pool used for the lookup (see [[VirtualIp|virtual IP]] for details).
569 67 Tobias Brunner
     Since [[5.0.1]] a comma-separated list of IP addresses / pools is accepted, for instance, to define pools of
570 1 Martin Willi
     different address families.
571 1 Martin Willi
572 1 Martin Willi
_left|rightsubnet = <ip subnet>![[<proto/port>]][,...]_
573 1 Martin Willi
574 57 Tobias Brunner
p((. private subnet behind the left participant, expressed as network/netmask; if omitted, essentially assumed
575 58 Tobias Brunner
     to be _left_/32|128, signifying that the _left|right_ end of the connection goes to the _left|right_ participant only.
576 58 Tobias Brunner
     The configured subnets of the peers may differ, the protocol narrows it to the greatest common subnet.
577 58 Tobias Brunner
     Since [[5.0.0]] this is also done for IKEv1, but as this may lead to problems with other implementations,
578 58 Tobias Brunner
     make sure to configure identical subnets in such configurations.
579 1 Martin Willi
     IKEv2 supports multiple subnets separated by commas, IKEv1 only interprets the first subnet of such a definition,
580 1 Martin Willi
     unless the Cisco Unity extension plugin is enabled (available since [[5.0.1]]). 
581 70 Tobias Brunner
582 70 Tobias Brunner
p((. Since [[5.1.0]] the optional part after each subnet enclosed in square brackets specifies a protocol/port to restrict
583 70 Tobias Brunner
     the selector for that subnet. *Examples:* leftsubnet=10.0.0.1[tcp/http],10.0.0.2[6/80] or leftsubnet=fec1::1[udp],10.0.0.0/16[/53].
584 70 Tobias Brunner
     Instead of omitting either value _%any_ can be used to the same effect, e.g. leftsubnet=fec1::1[udp/%any],10.0.0.0/16[%any/53].
585 70 Tobias Brunner
586 67 Tobias Brunner
p((. Since [[5.1.1]], if the protocol is _icmp_ or _ipv6-icmp_ the port is interpreted as ICMP message type if it is less than 256,
587 67 Tobias Brunner
     or as type and code if it greater or equal to 256, with the type in the most significant 8 bits and the code in the
588 67 Tobias Brunner
     least significant 8 bits.
589 67 Tobias Brunner
590 67 Tobias Brunner
p((. The port value can alternatively take the value _%opaque_ for RFC 4301 OPAQUE selectors, or a numerical range
591 67 Tobias Brunner
     in the form 1024-65535. None of the kernel backends currently supports opaque or port ranges and uses _%any_
592 67 Tobias Brunner
     for policy installation instead.
593 67 Tobias Brunner
594 23 Tobias Brunner
p((. Instead of specifying a subnet, _%dynamic_ can be used to replace it with the IKE address, having the same effect
595 21 Andreas Steffen
     as omitting _left|rightsubnet_ completely. Using _%dynamic_ can be used to define multiple dynamic selectors,
596 1 Martin Willi
     each having a potentially different protocol/port definition.
597 31 Martin Willi
598 1 Martin Willi
_left|rightupdown = <path>_
599 33 Tobias Brunner
600 33 Tobias Brunner
p((. what _updown_ script to run to adjust routing and/or firewalling when the status of the connection
601 33 Tobias Brunner
     changes (default _ipsec _updown_). Relevant only locally, other end need not agree on it.
602 33 Tobias Brunner
     Charon uses the _updown_ script to insert firewall rules only, since routing has been implemented directly
603 33 Tobias Brunner
     into the daemon.
604 33 Tobias Brunner
605 33 Tobias Brunner
h2. IKEv2 Mediation Extension Parameters
606 23 Tobias Brunner
607 23 Tobias Brunner
The following parameters are relevant to IKEv2 Mediation Extension operation only.
608 31 Martin Willi
609 57 Tobias Brunner
_mediation = yes | *no*_
610 57 Tobias Brunner
611 57 Tobias Brunner
p((. whether this connection is a mediation connection,  ie.  whether this connection is used to mediate other
612 57 Tobias Brunner
     connections.  Mediation connections create no child SA. Acceptable values  are  no (the default) and yes.
613 57 Tobias Brunner
614 21 Andreas Steffen
_mediated_by = <name>_
615 1 Martin Willi
616 31 Martin Willi
p((. the  name  of the connection to mediate this connection through. If given, the connection will  be  mediated
617 1 Martin Willi
     through  the  named mediation  connection.  The mediation connection must set *mediation=yes*.
618 57 Tobias Brunner
619 1 Martin Willi
_me_peerid = <id>_
620 1 Martin Willi
621 58 Tobias Brunner
p((. ID as which the peer is known to the mediation server, ie. which the  other end of this connection uses as
622 58 Tobias Brunner
     its leftid on its connection to the mediation server.  This is the ID we request  the mediation server to
623 58 Tobias Brunner
     mediate us with.  If me_peerid is not given, the rightid of this connection will be used as peer ID.
624 58 Tobias Brunner
625 58 Tobias Brunner
h2. Removed parameters (since 5.0.0)
626 58 Tobias Brunner
627 58 Tobias Brunner
_auth = *esp* | ah_
628 58 Tobias Brunner
629 69 Tobias Brunner
p((. whether authentication should be done as part of ESP encryption, or separately using the AH protocol.
630 69 Tobias Brunner
	Only supported by the IKEv1 daemon pluto.
631 58 Tobias Brunner
632 58 Tobias Brunner
p((. Since [[5.1.1]] the *ah* keyword can be used to configure AH with the charon IKE daemon.
633 58 Tobias Brunner
634 58 Tobias Brunner
_pfs = *yes* | no_
635 58 Tobias Brunner
636 58 Tobias Brunner
p((. whether _Perfect Forward Secrecy_ of keys is desired on the connection's keying channel (with PFS,
637 58 Tobias Brunner
     penetration of the key-exchange protocol does not compromise keys negotiated earlier). IKEv2 always uses
638 58 Tobias Brunner
     PFS for IKE_SA rekeying whereas for CHILD_SA rekeying PFS is enforced by defining a Diffie-Hellman dhgroup
639 58 Tobias Brunner
     in the _esp_ parameter.  Since [[5.0.0]] the latter also applies to IKEv1 and this parameter has no effect anymore.
640 58 Tobias Brunner
641 58 Tobias Brunner
_pfsgroup = <modp group>_
642 58 Tobias Brunner
643 58 Tobias Brunner
p((. defines a Diffie-Hellman group for _perfect forward secrecy_ in IKEv1 Quick Mode differing from the DH group
644 58 Tobias Brunner
     used for IKEv1 Main Mode (IKEv1 pluto daemon only).
645 58 Tobias Brunner
646 58 Tobias Brunner
_left|rightnexthop = %direct | %defaultroute | <ip address> | <fqdn>_
647 58 Tobias Brunner
648 58 Tobias Brunner
p((. This parameter is usually not needed any more because the NETKEY IPsec stack does not require
649 58 Tobias Brunner
     explicit routing entries for the traffic to be tunneled. If _left|sourceip_ is used with IKEv1
650 58 Tobias Brunner
     then _left|rightnexthop_ must still be set in order for the source routes to work properly.
651 58 Tobias Brunner
652 58 Tobias Brunner
_left|rightsubnetwithin = <ip subnet>_
653 1 Martin Willi
654 1 Martin Willi
p((. the  peer can propose any subnet or single IP address that fits within the range defined by
655 1 Martin Willi
     _left|rightsubnetwithin_.  Is a synonym for _left|rightsubnet_ since [[5.0.0]], as subnets are narrowed.