.\" $OpenBSD: isakmpd.conf.5,v 1.33 2000/03/23 21:39:56 aaron Exp $ .\" $EOM: isakmpd.conf.5,v 1.38 2000/01/31 08:39:44 niklas Exp $ .\" .\" Copyright (c) 1998, 1999, 2000 Niklas Hallqvist. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by Ericsson Radio Systems. .\" 4. The name of the author may not be used to endorse or promote products .\" derived from this software without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .\" This code was written under funding by Ericsson Radio Systems. .\" .\" Manual page, using -mandoc macros .\" .Dd October 10, 1998 .Dt ISAKMPD.CONF 5 .Os .Sh NAME .Nm isakmpd.conf .Nd configuration file for isakmpd .Sh DESCRIPTION .Nm is the configuration file for the .Nm isakmpd daemon managing security association and key management for the IPSEC layer of the kernel's networking stack. .Pp The file is of a well known type of format called .INI style, named after the suffix used by an overrated windowing environment for its configuration files. This format consists of sections, each beginning with a line looking like: .Bd -literal [Section name] .Ed Between the brackets is the name of the section following this section header. Inside a section many tag/value pairs can be stored, each one looking like: .Bd -literal Tag=Value .Ed If the value needs more space than fits on a single line it's possible to continue it on the next by ending the first with a backspace character immediately before the newline character. This method can extend a value for an arbitrary amount of lines. .Pp Comments can be put anywhere in the file by using a hash mark .Pq Sq \&# . Then the comment goes on to the end of the line. .Pp Often the right-hand side values consist of other section names. This results in a tree structure. Some values are treated as a list of several scalar values, such lists always use comma as the separator. Some values are formatted like this: X,Y:Z, which is an offer/accept syntax, where X is a value we offer and Y:Z is a range of accepted values, inclusive. .Pp .Ss Roots .Bl -hang -width 12n .It Em General Generic global configuration parameters .Bl -tag -width 12n .It Em Policy-File The name of the file that contains .Xr KeyNote 4 policies. The default is "/etc/isakmpd/isakmpd.policy". .It Em Retransmits How many times should a message be retransmitted before giving up. .It Em Check-interval The interval between watchdog checks of connections we want up at all times. .It Em Exchange-max-time How many seconds should an exchange maximally take to setup before we give up. .It Em Listen-on A list of IP-addresses OK to listen on. This list is used as a filter for the set of addresses the interfaces configured provides. This means that we won't see if an address given here does not exist on this host, and thus no error is given for that case. .It Em Shared-SADB If this tag is defined, whatever the value is, some semantics of .Nm are changed so that multiple instances can run on top of one SADB and setup SAs with eachother. Specifically this means replay protection will not be asked for, and errors that can occur when updating an SA with its parameters a 2nd time will be ignored. .El .It Em Phase 1 ISAKMP SA negotiation parameter root .Bl -tag -width 12n .It Em A name of the ISAKMP peer at the given IP-address. This name is used as the section name for further information to be found. Look at below. .El .It Em Phase 2 IPsec SA negotiation parameter root .Bl -tag -width 12n .It Em Connections A list of directed IPSec "connection" names that should be brought up automatically, either on first use if the system supports it, or at startup of the daemon. These names are section names where further information can be found. Look at below. Normally any connection mentioned here are treated as part of the "Passive-connection" list we present below, however there is a flag: "Active-only" that disables this behaviour. This too is mentioned in the section, in the "Flags" tag. .It Em Passive-connections A list of IPSec "connection" names we recognize and accept initiations for. These names are section names where further information can be found. Look at below. Currently only the Local-ID and Remote-ID tags are looked at in those sections, as they are matched against the IDs given by the initiator. .El .It Em X509-Certificates .Bl -tag -width 12n .It Em Ca-directory A directory containing PEM certificates of certification authorities that we trust to sign other certificates. Note that for a CA to be really trusted, it needs to be somehow referred to by policy, in .Xr isakmpd.policy 5 . The certificates in this directory are used for the actual X.509 authentication and for cross-referencing policies that refer to Distinguished Names (DNs). Keeping a separate directory (as opposed to integrating policies and X.509 CA certificates) allows for maintenance of a list of "well known" CAs without actually having to trust all (or any) of them. .It Em Cert-directory A directory containing PEM certificates that we trust to be valid. These certificates are used in preference to those passed in messages and are required to have a SubjectAltName extension. .It Em Accept-self-signed If this tag is defined, whatever the value is, certificates that do not originate from a trusted CA but are self-signed will be accepted. .It Em Private-key The private key matching the public key of our certificate (which should be in the "Cert-directory", and have a subjectAltName matching our ID, so far that is our IP-address). .El .El .Ss Referred-to sections .Bl -hang -width 12n .It Em Parameters for negotiation with an ISAKMP peer .Bl -tag -width 12n .It Em Phase The constant .Li 1 , as ISAKMP-peers and IPSec-connections really are handled by the same code inside isakmpd. .It Em Transport The name of the transport protocol, normally .Li udp . .It Em Listen-address The Local IP-address to use, if we are multi-homed, or have aliases. .It Em Address The IP-address of the peer. .It Em Port In case of UDP, the UDP port number to send to. This is optional, the default value is 500 which is the IANA-registered number for ISAKMP. .It Em Configuration The name of the ISAKMP-configuration section to use. Look at below. .It Em Authentication Authentication data for this specific peer. In the case of preshared key, this is the key value itself. .It Em ID If existent, the name of the section that describes the local client ID that we should present to our peer. If not present, it defaults to the address of the local interface we are sending packets over to the remote daemon. Look at below. .It Em Flags A comma-separated list of flags controlling the further handling of the ISAKMP SA. Currently there are no specific ISAKMP SA flags defined. .It Em Next-hop A Linux FreeS/WAN specific value which should be the IP address of the next hop along the path to reach the peer, usually a router. .El .It Em .Bl -tag -width 12n .It Em ID-type The ID type as given by the RFCs. For Phase 1 this is currently .Li IPV4_ADDR , .Li IPV4_ADDR_SUBNET , .Li FQDN , or .Li USER_FQDN . .It Em Address If the ID-type is .Li IPV4_ADDR , this tag should exist and be an IP-address. .It Em Network If the ID-type is .Li IPV4_ADDR_SUBNET this tag should exist and be a network address. .It Em Netmask If the ID-type is .Li IPV4_ADDR_SUBNET this tag should exist and be a network subnet mask. .It Em Name If the ID-type is .Li FQDN or .Li USER_FQDN , this tag should exist and contain a domain name or a user@domain string respectively. .El .It Em .Bl -tag -width 12n .It Em DOI The domain of interpretation as given by the RFCs. Normally .Li IPSEC . .It Em EXCHANGE_TYPE The exchange type as given by the RFCs. For main mode this is .Li ID_PROT and for aggressive mode it is .Li AGGRESSIVE . .It Em Transforms A list of proposed transforms to use for protecting the ISAKMP traffic. These are actually names for sections further describing the transforms. Look at below. .El .It Em .Bl -tag -width 12n .It Em ENCRYPTION_ALGORITHM The encryption algorithm as the RFCs name it, or ANY to denote that any encryption algorithm proposed will be accepted. .It Em KEY_LENGTH For encryption algorithms with variable key length, this is where the offered/accepted keylengths are described. The value is of the offer-accept kind described above. .It Em HASH_ALGORITHM The hash algorithm as the RFCs name it, or ANY. .It Em AUTHENTICATION_METHOD The authentication method as the RFCs name it, or ANY. .It Em GROUP_DESCRIPTION The group used for Diffie-Hellman exponentiations, or ANY. The name are symbolic, like .Li MODP_768 , MODP_1024 , EC_155 and .Li EC_185 . .It Em PRF The algorithm to use for the keyed pseudo-random function (used for key derivation and authentication in Phase 1), or ANY. .It Em Life A list of lifetime descriptions, or ANY. In the former case, each element is in itself a name of the section that defines the lifetime. Look at below. If it is set to ANY, then any type of proposed lifetime type and value will be accepted. .El .It Em .Bl -tag -width 12n .It Em LIFE_TYPE .Li SECONDS or .Li BYTES depending on the type of the duration. Notice that this field may NOT be set to ANY. .It Em LIFE_DURATION An offer/accept kind of value, see above. Can also be set to ANY. .El .It Em .Bl -tag -width 12n .It Em Phase The constant .Li 2 , as ISAKMP-peers and IPSec-connections really are handled by the same code inside isakmpd. .It Em ISAKMP-peer The name of the ISAKMP-peer which to talk to in order to set up this connection. The value is the name of an section. See above. .It Em Configuration The name of the IPSec-configuration section to use. Look at below. .It Em Local-ID If existent, the name of the section that describes the optional local client ID that we should present to our peer. It is also used when we act as responders to find out what we are dealing with. Look at below. .It Em Remote-ID If existent, the name of the section that describes the optional remote client ID that we should present to our peer. It is also used when we act as responders to find out what we are dealing with. Look at below. .It Em Flags A comma-separated list of flags controlling the further handling of the IPSec SA. Currently only one flag is defined: .Bl -tag -width 12n .It Em Active-only If this flag is given and this is part of the phase 2 connections we automatically keep up, it will not automatically be used for accepting connections from the peer. .El .El .It Em .Bl -tag -width 12n .It Em DOI The domain of interpretation as given by the RFCs. Normally .Li IPSEC . .It Em EXCHANGE_TYPE The exchange type as given by the RFCs. For quick mode this is .Li QUICK_MODE . .It Em Suites A list of protection suites (bundles of protocols) usable for protecting the IP traffic. Each of the list elements is a name of an section. See below. .El .It Em .Bl -tag -width 12n .It Em Protocols A list of the protocols included in this protection suite. Each of the list elements is a name of an section. See below. .El .It Em .Bl -tag -width 12n .It Em PROTOCOL_ID The protocol as given by the RFCs. Acceptable values today are .Li IPSEC_AH and .Li IPSEC_ESP . .It Em Transforms A list of transforms usable for implementing the protocol. Each of the list elements is a name of an section. See below. .It Em ReplayWindow The size of the window used for replay protection. This is normally left alone. Look at the .Nm ESP and .Nm AH RFCs for a better description. .El .It Em .Bl -tag -width 12n .It Em TRANSFORM_ID The transform ID as given by the RFCs. .It Em ENCAPSULATION_MODE The encapsulation mode as given by the RFCs. This means TRANSPORT or TUNNEL. .It Em AUTHENTICATION_ALGORITHM The optional authentication algorithm in the case of this being an ESP transform. .It Em GROUP_DESCRIPTION An optional (provides PFS if present) Diffie-Hellman group description. The values are the same as GROUP_DESCRIPTION's in sections shown above. .It Em Life List of lifetimes, each element is a section name. .El .It Em .Bl -tag -width 12n .It Em ID-type The ID type as given by the RFCs. For IPSec this is currently .Li IPV4_ADDR or .Li IPV4_ADDR_SUBNET . .It Em Address If the ID-type is .Li IPV4_ADDR , this tag should exist and be an IP-address. .It Em Network If the ID-type is .Li IPV4_ADDR_SUBNET this tag should exist and be a network address. .It Em Netmask If the ID-type is .Li IPV4_ADDR_SUBNET this tag should exist and be a network subnet mask. .El .El .Sh EXAMPLE An example of a configuration file: .Pp .Bd -literal # A configuration sample for the isakmpd ISAKMP/Oakley (aka IKE) daemon. [General] Policy-File= /etc/isakmpd/isakmpd.policy Retransmits= 5 Exchange-max-time= 120 Listen-on= 10.1.0.2 # Incoming phase 1 negotiations are multiplexed on the source IP address [Phase 1] 10.1.0.1= ISAKMP-peer-west # These connections are walked over after config file parsing and told # to the application layer so that it will inform us when traffic wants to # pass over them. This means we can do on-demand keying. [Phase 2] Connections= IPsec-east-west [ISAKMP-peer-west] Phase= 1 Transport= udp Local-address= 10.1.0.2 Address= 10.1.0.1 # Default values for "Port" commented out #Port= isakmp #Port= 500 Configuration= Default-main-mode Authentication= mekmitasdigoat Flags= Stayalive [IPsec-east-west] Phase= 2 ISAKMP-peer= ISAKMP-peer-west Configuration= Default-quick-mode Local-ID= Net-east Remote-ID= Net-west Flags= Stayalive [Net-west] ID-type= IPV4_ADDR_SUBNET Network= 192.168.1.0 Netmask= 255.255.255.0 [Net-east] ID-type= IPV4_ADDR_SUBNET Network= 192.168.2.0 Netmask= 255.255.255.0 # Main mode descriptions [Default-main-mode] DOI= IPSEC EXCHANGE_TYPE= ID_PROT Transforms= 3DES-SHA # Certificates stored in PEM format [X509-certificates] CA-directory= /etc/isakmpd/ca/ Cert-directory= /etc/isakmpd/certs/ Private-key= /etc/isakmpd/private/local.key # Main mode transforms ###################### # DES [DES-MD5] ENCRYPTION_ALGORITHM= DES_CBC HASH_ALGORITHM= MD5 AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_768 Life= LIFE_600_SECS,LIFE_1000_KB [DES-MD5-NO-VOL-LIFE] ENCRYPTION_ALGORITHM= DES_CBC HASH_ALGORITHM= MD5 AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_768 Life= LIFE_600_SECS [DES-SHA] ENCRYPTION_ALGORITHM= DES_CBC HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_768 Life= LIFE_600_SECS,LIFE_1000_KB # 3DES [3DES-SHA] ENCRYPTION_ALGORITHM= 3DES_CBC HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_1024 Life= LIFE_3600_SECS # Blowfish [BLF-SHA-M1024] ENCRYPTION_ALGORITHM= BLOWFISH_CBC KEY_LENGTH= 128,96:192 HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_1024 Life= LIFE_600_SECS,LIFE_1000_KB [BLF-SHA-EC155] ENCRYPTION_ALGORITHM= BLOWFISH_CBC KEY_LENGTH= 128,96:192 HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= EC2N_155 Life= LIFE_600_SECS,LIFE_1000_KB [BLF-MD5-EC155] ENCRYPTION_ALGORITHM= BLOWFISH_CBC KEY_LENGTH= 128,96:192 HASH_ALGORITHM= MD5 AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= EC2N_155 Life= LIFE_600_SECS,LIFE_1000_KB [BLF-SHA-EC185] ENCRYPTION_ALGORITHM= BLOWFISH_CBC KEY_LENGTH= 128,96:192 HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= EC2N_185 Life= LIFE_600_SECS,LIFE_1000_KB # Quick mode description ######################## [Default-quick-mode] DOI= IPSEC EXCHANGE_TYPE= QUICK_MODE Suites= QM-ESP-3DES-SHA-PFS-SUITE,QM-ESP-DES-MD5-SUITE # Quick mode protection suites ############################## # DES [QM-ESP-DES-SUITE] Protocols= QM-ESP-DES [QM-ESP-DES-PFS-SUITE] Protocols= QM-ESP-DES-PFS [QM-ESP-DES-MD5-SUITE] Protocols= QM-ESP-DES-MD5 [QM-ESP-DES-MD5-PFS-SUITE] Protocols= QM-ESP-DES-MD5-PFS [QM-ESP-DES-SHA-SUITE] Protocols= QM-ESP-DES-SHA [QM-ESP-DES-SHA-PFS-SUITE] Protocols= QM-ESP-DES-SHA-PFS # 3DES [QM-ESP-3DES-SHA-SUITE] Protocols= QM-ESP-3DES-SHA [QM-ESP-3DES-SHA-PFS-SUITE] Protocols= QM-ESP-3DES-SHA-PFS # AH [QM-AH-MD5-SUITE] Protocols= QM-AH-MD5 [QM-AH-MD5-PFS-SUITE] Protocols= QM-AH-MD5-PFS # AH + ESP [QM-AH-MD5-ESP-DES-SUITE] Protocols= QM-AH-MD5,QM-ESP-DES [QM-AH-MD5-ESP-DES-MD5-SUITE] Protocols= QM-AH-MD5,QM-ESP-DES-MD5 [QM-ESP-DES-MD5-AH-MD5-SUITE] Protocols= QM-ESP-DES-MD5,QM-AH-MD5 # Quick mode protocols # DES [QM-ESP-DES] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-DES-XF [QM-ESP-DES-MD5] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-DES-MD5-XF [QM-ESP-DES-MD5-PFS] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-DES-MD5-PFS-XF [QM-ESP-DES-SHA] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-DES-SHA-XF # 3DES [QM-ESP-3DES-SHA] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-3DES-SHA-XF [QM-ESP-3DES-SHA-PFS] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-3DES-SHA-PFS-XF [QM-ESP-3DES-SHA-TRP] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-3DES-SHA-TRP-XF # AH MD5 [QM-AH-MD5] PROTOCOL_ID= IPSEC_AH Transforms= QM-AH-MD5-XF [QM-AH-MD5-PFS] PROTOCOL_ID= IPSEC_AH Transforms= QM-AH-MD5-PFS-XF # Quick mode transforms # ESP DES+MD5 [QM-ESP-DES-XF] TRANSFORM_ID= DES ENCAPSULATION_MODE= TUNNEL Life= LIFE_600_SECS [QM-ESP-DES-MD5-XF] TRANSFORM_ID= DES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_MD5 Life= LIFE_600_SECS [QM-ESP-DES-MD5-PFS-XF] TRANSFORM_ID= DES ENCAPSULATION_MODE= TUNNEL GROUP_DESCRIPTION= MODP_768 AUTHENTICATION_ALGORITHM= HMAC_MD5 Life= LIFE_600_SECS [QM-ESP-DES-SHA-XF] TRANSFORM_ID= DES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA Life= LIFE_600_SECS # 3DES [QM-ESP-3DES-SHA-XF] TRANSFORM_ID= 3DES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA Life= LIFE_600_SECS [QM-ESP-3DES-SHA-PFS-XF] TRANSFORM_ID= 3DES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA GROUP_DESCRIPTION= MODP_1024 Life= LIFE_600_SECS [QM-ESP-3DES-SHA-TRP-XF] TRANSFORM_ID= 3DES ENCAPSULATION_MODE= TRANSPORT AUTHENTICATION_ALGORITHM= HMAC_SHA Life= LIFE_600_SECS # AH [QM-AH-MD5-XF] TRANSFORM_ID= MD5 ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_MD5 Life= LIFE_600_SECS [QM-AH-MD5-PFS-XF] TRANSFORM_ID= MD5 ENCAPSULATION_MODE= TUNNEL GROUP_DESCRIPTION= MODP_768 Life= LIFE_600_SECS [LIFE_600_SECS] LIFE_TYPE= SECONDS LIFE_DURATION= 600,450:720 [LIFE_3600_SECS] LIFE_TYPE= SECONDS LIFE_DURATION= 3600,1800:7200 [LIFE_1000_KB] LIFE_TYPE= KILOBYTES LIFE_DURATION= 1000,768:1536 [LIFE_32_MB] LIFE_TYPE= KILOBYTES LIFE_DURATION= 32768,16384:65536 [LIFE_4.5_GB] LIFE_TYPE= KILOBYTES LIFE_DURATION= 4608000,4096000:8192000 .Ed .Sh SEE ALSO .Xr ipsec 4 , .Xr keynote 4 , .Xr isakmpd.policy 5 , .Xr isakmpd 8