.\" $OpenBSD: isakmpd.conf.5,v 1.118 2006/09/15 09:49:07 hshoexer Exp $ .\" $EOM: isakmpd.conf.5,v 1.57 2000/12/21 14:43:17 ho Exp $ .\" .\" Copyright (c) 1998, 1999, 2000 Niklas Hallqvist. All rights reserved. .\" Copyright (c) 2000, 2001, 2002 Håkan Olsson. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .\" This code was written under funding by Ericsson Radio Systems. .\" .\" Manual page, using -mandoc macros .\" .Dd August 07, 2002 .Dt ISAKMPD.CONF 5 .Os .Sh NAME .Nm isakmpd.conf .Nd configuration file for isakmpd .Sh DESCRIPTION .Nm is the configuration file for the .Xr isakmpd 8 daemon, managing security association and key management for the IPsec layer of the kernel's networking stack. .Pp The file is of a well known type of format called .INI style, named after the suffix used by an overrated windowing environment for its configuration files. This format consists of sections, each beginning with a line looking like: .Bd -unfilled .Bq Sy Section name .Ed Between the brackets is the name of the section following this section header. Inside a section many tag/value pairs can be stored, each one looking like: .Bd -unfilled .Ar Tag Ns = Ns Ar Value .Ed If the value needs more space than fits on a single line, it's possible to continue it on the next by ending the first with a backslash character immediately before the newline character. This method can extend a value for an arbitrary number of lines. .Pp Comments can be put anywhere in the file by using a hash mark .Pq Sq \&# . The comment extends to the end of the current line. .Pp Often the right-hand side values consist of other section names. This results in a tree structure. Some values are treated as a list of several scalar values. Such lists always use a comma character as the separator. Some values are formatted like this: X,Y:Z, which is an offer/accept syntax, where X is a value we offer and Y:Z is a range of accepted values, inclusive. .Pp To activate changes to .Nm without restarting .Xr isakmpd 8 , send a .Dv SIGHUP signal to the daemon process. .Sh AUTO-GENERATED PARTS OF THE CONFIGURATION Some predefined section names are recognized by the daemon, avoiding the need to fully specify the Main Mode transforms and Quick Mode suites, protocols, and transforms. .Pp For Main Mode: .\"{cipher}-{hash}[-{group}][-RSA_SIG] .Bl -inset -compact .It Xo .Sm off .No { .Ar cipher .No }-{ .Ar hash .No }[{- .Ar group .No }] .No [- .Ar RSA_SIG .No ] .Sm on .Xc .El .Pp where: .Bl -tag -width "{cipher}" -offset indent -compact .It Ns { Ns Ar cipher Ns } is either DES, BLF, 3DES, CAST, or AES .It Ns { Ns Ar hash Ns } is either MD5, SHA, or SHA2-{256,384,512} .It Ns { Ns Ar group Ns } is either GRP1, GRP2, GRP5, GRP14, or GRP15 .El .Pp For Quick Mode: .\" .Ar QM-{proto}[-TRP]-{cipher}[-{hash}][-PFS[-{group}]]-SUITE .Bl -inset -compact .It Xo .Sm off .Ar QM .No -{ .Ar proto .No }[- .Ar TRP .No ]-{ .Ar cipher .No }[-{ .Ar hash .No }] .No [- .Ar PFS .No [-{ .Ar group .No }]]- .Ar SUITE .Sm on .Xc .El .Pp where: .Bl -tag -width "{cipher}" -offset indent -compact .It Ns { Ns Ar proto Ns } is either ESP or AH .It Ns { Ns Ar cipher Ns } is either DES, 3DES, CAST, BLF, AES, or AESCTR .It Ns { Ns Ar hash Ns } is either MD5, SHA, RIPEMD, or SHA2-{256,384,512} .It Ns { Ns Ar group Ns } is either GRP1, GRP2, GRP5, GRP14, or GRP15 .El .Pp For example, AES-SHA2-256 means: AES encryption, SHA2-256 hash, and authorization by pre-shared keys. Adding "-RSA_SIG" will enable public key authentication, e.g. AES-SHA2-256-RSA_SIG. Similarly, QM-ESP-3DES-SHA-PFS-SUITE means: ESP protocol, 3DES encryption, SHA hash, and use Perfect Forward Secrecy. .Pp Unless explicitly stated with -GRP1, 2, 5, 14 or 15, transforms and PFS suites use DH group 2. There are currently no predefined ESP+AH Quick Mode suites. .Pp The predefinitions include some default values for the special sections "General", "Keynote", "X509-certificates", and "Default-phase-1-configuration". These default values are presented in the example below. .Pp All autogenerated values can be overridden by manual entries by using the same section and tag names in the configuration file. In particular, the default phase 1 (Main or Aggressive Mode) and phase 2 (Quick Mode) lifetimes can be overridden by these tags under the "General" section: .Bd -literal -offset indent [General] Default-phase-1-lifetime= 3600,60:86400 Default-phase-2-lifetime= 1200,60:86400 .Ed .Pp The Main Mode lifetime currently defaults to one hour (minimum 60 seconds, maximum 1 day). The Quick Mode lifetime defaults to 20 minutes (minimum 60 seconds, maximum 1 day). .Pp Also, the default phase 1 ID can be set by creating a .Aq Sy Phase1-ID section, as shown below, and adding this tag under the "General" section: .Bd -literal -offset indent [General] Default-phase-1-ID= Phase1-ID-name [Phase1-ID-name] ID-type= USER_FQDN Name= foo@bar.com .Ed .Sh ROOTS .Bl -hang -width 8n .It Bq Sy General Generic global configuration parameters .Bl -tag -width Ds .It Em Acquire-Only If this tag is defined, .Xr isakmpd 8 will not set up flows automatically. This is useful when flows are configured with .Xr ipsecctl 8 or by other programs like .Xr bgpd 8 . Thus .Xr isakmpd 8 only takes care of the SA establishment. .It Em Check-interval The interval between watchdog checks of connections we want up at all times, in seconds. The default value is 60 seconds. .It Em Default-phase-1-ID Optional default phase 1 ID name. .It Em Default-phase-1-lifetime The default lifetime for autogenerated transforms (phase 1). If unspecified, the value 3600,60:86400 is used as the default. .It Em Default-phase-2-lifetime The default lifetime for autogenerated suites (phase 2). If unspecified, the value 1200,60:86400 is used as the default. .It Em Default-phase-2-suites A list of phase 2 suites that will be used when establishing dynamic SAs. If left unspecified, QM-ESP-3DES-SHA-PFS-SUITE is used as the default. .It Em DPD-check-interval The interval between RFC 3706 (Dead Peer Detection) messages, in seconds. The default value is 0 (zero), which means DPD is disabled. .It Em Exchange-max-time How many seconds should an exchange maximally take to set up before we give up. .It Em Listen-on A list of IP addresses or interface names OK to listen on. This list is used as a filter for the set of addresses the interfaces configured provides. This means that we won't see if an address given here does not exist on this host, and thus no error is given for that case. .It Em Loglevel A list of the form .Ar class Ns = Ns Ar level , where both .Ar class and .Ar level are numbers. This is similar to the .Fl D command line switch of .Xr isakmpd 8 . .It Em Logverbose If this tag is defined, whatever the value is, verbose logging is enabled. This is similar to the .Fl v command line switch of .Xr isakmpd 8 . .It Em NAT-T-Keepalive The number of seconds between NAT-T keepalive messages, sent by the peer behind NAT to keep the mapping active. Defaults to 20. .It Em Policy-file The name of the file that contains .Xr keynote 4 policies. The default is .Pa /etc/isakmpd/isakmpd.policy . .It Em Pubkey-directory The directory in which .Nm looks for explicitly trusted public keys. The default is .Pa /etc/isakmpd/pubkeys . Read .Xr isakmpd 8 for the required naming convention of the files in here. .It Em Renegotiate-on-HUP If this tag is defined, whatever the value is, .Xr isakmpd 8 will renegotiate all current phase 2 SAs when the daemon receives a .Dv SIGHUP signal, or an .Sq R is sent to the FIFO interface (see .Xr isakmpd 8 ) . .It Em Retransmits How many times should a message be retransmitted before giving up. .It Em Shared-SADB If this tag is defined, whatever the value is, some semantics of .Nm are changed so that multiple instances can run on top of one SADB and set up SAs with each other. Specifically this means replay protection will not be asked for, and errors that can occur when updating an SA with its parameters a 2nd time will be ignored. .It Em Use-Keynote This tag controls the use of .Xr keynote 4 policy checking. The default value is .Qq yes , which enables the policy checking. When set to any other value, policies will not be checked. This is useful when policies for flows and SA establishment are arranged by other programs like .Xr ipsecctl 8 or .Xr bgpd 8 . .El .It Bq Sy Phase 1 ISAKMP SA negotiation parameter root .Bl -tag -width Ds .It Em Default A name of the default ISAKMP peer. Incoming phase 1 connections from other IP addresses will use this peer name. This name is used as the section name for further information to be found. Look at .Aq Sy ISAKMP-peer below. .It Aq Em IP-address A name of the ISAKMP peer at the given IP address. .El .It Bq Sy Phase 2 IPsec SA negotiation parameter root .Bl -tag -width Ds .It Em Connections A list of directed IPsec "connection" names that should be brought up automatically, either on first use if the system supports it, or at startup of the daemon. These names are section names where further information can be found. Look at .Aq Sy IPsec-connection below. Normally any connections mentioned here are treated as part of the "Passive-connection" list we present below; however there is a flag, .Em Active-only , that disables this behaviour. This too is mentioned in the .Aq Sy IPsec-connection section, in the "Flags" tag. .It Em Passive-connections A list of IPsec "connection" names we recognize and accept initiations for. These names are section names where further information can be found. Look at .Aq Sy IPsec-connection below. Currently only the Local-ID and Remote-ID tags are looked at in those sections, as they are matched against the IDs given by the initiator. .El .It Bq Sy KeyNote KeyNote configuration section .Bl -tag -width Ds .It Em Credential-directory A directory containing directories named after IDs (IP addresses, .Dq user@domain , or hostnames) that contain files named .Dq credentials and .Dq private_key . .Pp The credentials file contains .Xr keynote 4 credentials that are sent to a remote IKE daemon when we use the associated ID, or credentials that we may want to consider when doing an exchange with a remote IKE daemon that uses that ID. Note that, in the former case, the last credential in the file MUST contain our public key in its Licensees field. More than one credentials may exist in the file. They are separated by whitelines (the format is essentially the same as that of the policy file). The credentials are of the same format as the policies described in .Xr isakmpd.policy 5 . The only difference is that the Authorizer field contains a public key, and the assertion is signed. Signed assertions can be generated using the .Xr keynote 1 utility. .Pp The private_key file contains the private RSA key we use for authentication. If the directory (and the files) exist, they take precedence over X509-based authentication. .El .It Bq Sy X509-Certificates X509-certificate configuration section .Bl -tag -width Ds .It Em Accept-self-signed If this tag is defined, whatever the value is, certificates that do not originate from a trusted CA but are self-signed will be accepted. .It Em Ca-directory A directory containing PEM certificates of certification authorities that we trust to sign other certificates. Note that for a CA to be really trusted, it needs to be somehow referred to by policy, in .Xr isakmpd.policy 5 . The certificates in this directory are used for the actual X.509 authentication and for cross-referencing policies that refer to Distinguished Names (DNs). Keeping a separate directory (as opposed to integrating policies and X.509 CA certificates) allows for maintenance of a list of "well known" CAs without actually having to trust all (or any) of them. .It Em Cert-directory A directory containing PEM certificates that we trust to be valid. These certificates are used in preference to those passed in messages and are required to have a subjectAltName extension containing the certificate holder identity; usually IP address, FQDN, or User FQDN. .It Em Private-key The private key matching the public key of our certificate (which should be in the "Cert-directory", and have an appropriate subjectAltName field). .It Em Private-key-directory A directory containing private keys named after an ID (IP addresses, .Dq user@domain , or hostnames). .El .El .Sh REFERRED-TO SECTIONS .Bl -hang -width Ds .It Aq Sy ISAKMP-peer Parameters for negotiation with an ISAKMP peer .Bl -tag -width Ds .It Em Address If existent, the IP address of the peer. .It Em Authentication If existent, authentication data for this specific peer. In the case of a pre-shared key, this is the key value itself. .It Em Configuration The name of the ISAKMP-configuration section to use. Look at .Aq Sy ISAKMP-configuration below. If unspecified, defaults to "Default-phase-1-configuration". .It Em Flags A comma-separated list of flags controlling the further handling of the ISAKMP SA. Currently there are no specific ISAKMP SA flags defined. .It Em ID If existent, the name of the section that describes the local client ID that we should present to our peer. If not present, it defaults to the address of the local interface we are sending packets over to the remote daemon. Look at .Aq Sy Phase1-ID below. .It Em Local-address The Local IP address to use, if we are multi-homed, or have aliases. .It Em Phase The constant .Sq 1 , as ISAKMP-peers and IPsec-connections really are handled by the same code inside .Xr isakmpd 8 . .It Em Port For UDP, the UDP port number to send to. This is optional; the default value is 500 which is the IANA-registered number for ISAKMP. .It Em Remote-ID If existent, the name of the section that describes the remote client ID we expect the remote daemon to send us. If not present, it defaults to the address of the remote daemon. Look at .Aq Sy Phase1-ID below. .It Em Transport The name of the transport protocol; defaults to UDP. .El .It Aq Sy Phase1-ID Parameters for Phase 1 negotiation .Bl -tag -width Ds .It Em Address If the ID-type is .Li IPV4_ADDR or .Li IPV6_ADDR , this tag should exist and be an IP address. .It Em ID-type The ID type as given by the RFC specifications. For phase 1 this is currently .Li IPV4_ADDR , .Li IPV4_ADDR_SUBNET , .Li IPV6_ADDR , .Li IPV6_ADDR_SUBNET , .Li FQDN , .Li USER_FQDN , or .Li KEY_ID . .It Em Name If the ID-type is .Li FQDN , .Li USER_FQDN , or .Li KEY_ID , this tag should exist and contain a domain name, user@domain, or other identifying string respectively. .Pp In the case of .Li KEY_ID , note that the IKE protocol allows any octet sequence to be sent or received under this payload, potentially including non-printable ones. .Xr isakmpd 8 can only transmit printable .Li KEY_ID payloads, but can receive and process arbitrary .Li KEY_ID payloads. This effectively means that non-printable .Li KEY_ID remote identities cannot be verified through this means, although it is still possible to do so through .Xr isakmpd.policy 5 . .It Em Netmask If the ID-type is .Li IPV4_ADDR_SUBNET or .Li IPV6_ADDR_SUBNET , this tag should exist and be a network subnet mask. .It Em Network If the ID-type is .Li IPV4_ADDR_SUBNET or .Li IPV6_ADDR_SUBNET , this tag should exist and be a network address. .El .It Aq Sy ISAKMP-configuration Parameters for ISAKMP configuration .Bl -tag -width Ds .It Em DOI The domain of interpretation as given by the RFCs. Normally .Li IPSEC . If unspecified, defaults to .Li IPSEC . .It Em EXCHANGE_TYPE The exchange type as given by the RFCs. For main mode this is .Li ID_PROT and for aggressive mode it is .Li AGGRESSIVE . .It Em Transforms A list of proposed transforms to use for protecting the ISAKMP traffic. These are actually names for sections further describing the transforms. Look at .Aq Sy ISAKMP-transform below. .El .It Aq Sy ISAKMP-transform Parameters for ISAKMP authentication .Bl -tag -width Ds .It Em AUTHENTICATION_METHOD The authentication method as the RFCs name it, or ANY. .It Em ENCRYPTION_ALGORITHM The encryption algorithm as the RFCs name it, or ANY to denote that any encryption algorithm proposed will be accepted. .It Em GROUP_DESCRIPTION The group used for Diffie-Hellman exponentiations, or ANY. The names are symbolic, like .Li MODP_768 , MODP_1024 , EC_155 , and .Li EC_185 . .It Em HASH_ALGORITHM The hash algorithm as the RFCs name it, or ANY. .It Em KEY_LENGTH For encryption algorithms with variable key length, this is where the offered/accepted keylengths are described. The value is of the offer-accept kind described above. .It Em Life A list of lifetime descriptions, or ANY. In the former case, each element is in itself a name of the section that defines the lifetime. Look at .Aq Sy Lifetime below. If it is set to ANY, then any type of proposed lifetime type and value will be accepted. .It Em PRF The algorithm to use for the keyed pseudo-random function (used for key derivation and authentication in phase 1), or ANY. .El .It Aq Sy Lifetime Parameters for connection duration .Bl -tag -width Ds .It Em LIFE_DURATION An offer/accept kind of value; see above. Can also be set to ANY. .It Em LIFE_TYPE .Li SECONDS or .Li KILOBYTES depending on the type of the duration. Notice that this field may NOT be set to ANY. .El .It Aq Sy IPsec-connection Parameters for IPsec connection configuration .Bl -tag -width Ds .It Em Configuration The name of the IPsec-configuration section to use. Look at .Aq Sy IPsec-configuration below. .It Em Flags A comma-separated list of flags controlling the further handling of the IPsec SA. Currently only one flag is defined: .Bl -tag -width 12n .It Em Active-only If this flag is given and this .Aq Sy IPsec-connection is part of the phase 2 connections we automatically keep up, it will not automatically be used for accepting connections from the peer. .El .It Em ISAKMP-peer The name of the ISAKMP-peer to talk to in order to set up this connection. The value is the name of an .Aq Sy ISAKMP-peer section. See above. .It Em Local-ID If existent, the name of the section that describes the optional local client ID that we should present to our peer. It is also used when we act as responders to find out what .Aq Sy IPsec-connection we are dealing with. Look at .Aq Sy IPsec-ID below. .It Em Phase The constant .Sq 2 , as ISAKMP-peers and IPsec-connections really are handled by the same code inside .Xr isakmpd 8 . .It Em Remote-ID If existent, the name of the section that describes the optional remote client ID that we should present to our peer. It is also used when we act as responders to find out what .Aq Sy IPsec-connection we are dealing with. Look at .Aq Sy IPsec-ID below. .El .It Aq Sy IPsec-configuration Parameters for IPsec configuration .Bl -tag -width Ds .It Em DOI The domain of interpretation as given by the RFCs. Normally .Li IPSEC . If unspecified, defaults to .Li IPSEC . .It Em EXCHANGE_TYPE The exchange type as given by the RFCs. For quick mode this is .Li QUICK_MODE . .It Em Suites A list of protection suites (bundles of protocols) usable for protecting the IP traffic. Each of the list elements is a name of an .Aq Sy IPsec-suite section. See below. .El .It Aq Sy IPsec-suite Parameters for IPsec protection suite configuration .Bl -tag -width Ds .It Em Protocols A list of the protocols included in this protection suite. Each of the list elements is a name of an .Aq Sy IPsec-protocol section. See below. .El .It Aq Sy IPsec-protocol Parameters for IPsec protocol configuration .Bl -tag -width Ds .It Em PROTOCOL_ID The protocol as given by the RFCs. Acceptable values are currently .Li IPSEC_AH and .Li IPSEC_ESP . .It Em ReplayWindow The size of the window used for replay protection. This is normally left alone. Look at the ESP and AH RFCs for a better description. .It Em Transforms A list of transforms usable for implementing the protocol. Each of the list elements is a name of an .Aq Sy IPsec-transform section. See below. .El .It Aq Sy IPsec-transform Parameters for IPsec transform configuration .Bl -tag -width Ds .It Em AUTHENTICATION_ALGORITHM The optional authentication algorithm in the case of this being an ESP transform. .It Em ENCAPSULATION_MODE The encapsulation mode as given by the RFCs. This means TRANSPORT or TUNNEL. .It Em GROUP_DESCRIPTION An optional (provides PFS if present) Diffie-Hellman group description. The values are the same as those for GROUP_DESCRIPTION in .Aq Sy ISAKMP-transform sections shown above. .It Em KEY_LENGTH For encryption algorithms with variable key length, this is where the offered keylength is described. .It Em Life List of lifetimes, each element is a .Aq Sy Lifetime section name. .It Em TRANSFORM_ID The transform ID as given by the RFCs. .El .It Aq Sy IPsec-ID Parameters for IPsec ID configuration .Bl -tag -width Ds .It Em Address If the ID-type is .Li IPV4_ADDR or .Li IPV6_ADDR , this tag should exist and be an IP address, an interface name, or the .Em default keyword. If an interface is used, the first address of the appropriate family will be used. The .Em default keyword uses the interface associated with the default route. In the case of IPv6, link-local addresses will be skipped if addresses which are not link-local exist. If the address on the interface changes .Xr isakmpd 8 will not track the change. The configuration must be reloaded to learn the new address. .It Em ID-type The ID type as given by the RFCs. For IPsec this is currently .Li IPV4_ADDR , .Li IPV6_ADDR , .Li IPV4_ADDR_SUBNET , or .Li IPV6_ADDR_SUBNET . .It Em Netmask If the ID-type is .Li IPV4_ADDR_SUBNET or .Li IPV6_ADDR_SUBNET , this tag should exist and be a network subnet mask or an interface. When an interface is specified, the netmask is the mask associated with the .Em Network . The .Em default keyword uses the interface associated with the default route. .It Em Network If the ID-type is .Li IPV4_ADDR_SUBNET or .Li IPV6_ADDR_SUBNET , this tag should exist and be a network address, an interface, or the .Em default keyword. When an interface is specified, the network is selected as with the .Em Address tag. .It Em Port If the ID-type is .Li IPV4_ADDR , .Li IPV4_ADDR_SUBNET , .Li IPV6_ADDR , or .Li IPV6_ADDR_SUBNET , this tag indicates what source or destination port is allowed to be transported over the SA (depending on whether this is a local or remote ID). If left unspecified, all ports of the given transport protocol will be transmitted (or permitted) over the SA. The .Em Protocol tag must be specified in conjunction with this tag. .It Em Protocol If the ID-type is .Li IPV4_ADDR , .Li IPV4_ADDR_SUBNET , .Li IPV6_ADDR , or .Li IPV6_ADDR_SUBNET , this tag indicates what transport protocol should be transmitted over the SA. If left unspecified, all transport protocols between the two address (ranges) will be sent (or permitted) over that SA. .El .El .Sh OTHER SECTIONS .Bl -hang -width 8n .It Aq Sy IKECFG-ID Parameters to use with IKE mode-config. One ID per peer. .Pp An IKECFG-ID is written as [/]. The following ID types are supported: .Pp .Bl -tag -width "ASN1_DNXX" -offset indent -compact .It IPv4 [ipv4/A.B.C.D] .It IPv6 [ipv6/abcd:abcd::ab:cd] .It FQDN [fqdn/foo.bar.org] .It UFQDN [ufqdn/user@foo.bar.org] .It ASN1_DN [asn1_dn//C=aa/O=cc/...] (Note the double slashes as the DN itself starts with a .Sq / . ) .El .Pp Each section specifies what configuration values to return to the peer requesting IKE mode-config. Currently supported values are: .Pp .Bl -tag -width "WINS-serverXX" -offset indent -compact .It Em Address The peer's network address. .It Em Netmask The peer's netmask. .It Em Nameserver The IP address of a DNS nameserver. .It Em WINS-server The IP address of a WINS server. .El .It Aq Sy Initiator-ID Parameters for peer initiator configuration .Pp During phase 1 negotiation .Xr isakmpd 8 looks for a pre-shared key in the .Aq Sy ISAKMP-peer section. If no Authentication data is specified in that section, and .Xr isakmpd 8 is not the initiator, it looks for Authentication data in a section named after the initiator's phase 1 ID. This allows mobile users with dynamic IP addresses to have different shared secrets. .Pp This only works for aggressive mode because in main mode the remote initiator ID would not yet be known. Note, however, that use of aggressive mode is discouraged. See .Sx CAVEATS , below. .Pp The name of the .Aq Sy Initiator-ID section depends on the ID type sent by the initiator. Currently this can be: .Pp .Bl -tag -width "UFQDNXX" -offset indent -compact .It IPv4 [A.B.C.D] .It IPv6 [abcd:abcd::ab:cd] .It FQDN [foo.bar.org] .It UFQDN [user@foo.bar.org] .El .El .Sh FILES .Bl -tag -width /etc/isakmpd/isakmpd.conf .It Pa /etc/isakmpd/isakmpd.conf The default .Xr isakmpd 8 configuration file. .It Pa /usr/share/ipsec/isakmpd/ A directory containing some sample .Xr isakmpd 8 configuration files. .El .Sh EXAMPLES An example of a configuration file: .Bd -literal # A configuration sample for the isakmpd ISAKMP/Oakley (aka IKE) daemon. [General] Listen-on= 10.1.0.2 # Incoming phase 1 negotiations are multiplexed on the source IP address [Phase 1] 10.1.0.1= ISAKMP-peer-west # These connections are walked over after config file parsing and told # to the application layer so that it will inform us when traffic wants to # pass over them. This means we can do on-demand keying. [Phase 2] Connections= IPsec-east-west # Default values are commented out. [ISAKMP-peer-west] Phase= 1 #Transport= udp Local-address= 10.1.0.2 Address= 10.1.0.1 #Port= isakmp #Port= 500 #Configuration= Default-phase-1-configuration Authentication= mekmitasdigoat #Flags= [IPsec-east-west] Phase= 2 ISAKMP-peer= ISAKMP-peer-west Configuration= Default-quick-mode Local-ID= Net-east Remote-ID= Net-west #Flags= [Net-west] ID-type= IPV4_ADDR_SUBNET Network= 192.168.1.0 Netmask= 255.255.255.0 [Net-east] ID-type= IPV4_ADDR_SUBNET Network= 192.168.2.0 Netmask= 255.255.255.0 # Quick mode descriptions [Default-quick-mode] EXCHANGE_TYPE= QUICK_MODE Suites= QM-ESP-3DES-SHA-PFS-SUITE,QM-ESP-AES-SHA-PFS-SUITE # Data for an IKE mode-config peer [asn1_dn//C=SE/L=SomeCity/O=SomeCompany/CN=SomePeer.company.com] Address= 192.168.1.123 Netmask= 255.255.255.0 Nameserver= 192.168.1.10 WINS-server= 192.168.1.11 # pre-shared key based on initiator's phase 1 ID [foo.bar.org] Authentication= mekmitasdigoat # # ##################################################################### # All configuration data below this point is not required as the example # uses the predefined Main Mode transform and Quick Mode suite names. # It is included here for completeness. Note the default values for the # [General] and [X509-certificates] sections just below. # ##################################################################### # [General] Policy-file= /etc/isakmpd/isakmpd.policy Retransmits= 3 Exchange-max-time= 120 # KeyNote credential storage [KeyNote] Credential-directory= /etc/isakmpd/keynote/ # Certificates stored in PEM format [X509-certificates] CA-directory= /etc/isakmpd/ca/ Cert-directory= /etc/isakmpd/certs/ CRL-directory= /etc/isakmpd/crls/ Private-key= /etc/isakmpd/private/local.key # Default phase 1 description (Main Mode) [Default-phase-1-configuration] EXCHANGE_TYPE= ID_PROT Transforms= 3DES-SHA # Main mode transforms ###################### # DES [DES-MD5] ENCRYPTION_ALGORITHM= DES_CBC HASH_ALGORITHM= MD5 AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_1024 Life= Default-phase-1-lifetime [DES-SHA] ENCRYPTION_ALGORITHM= DES_CBC HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_1024 Life= Default-phase-1-lifetime # 3DES [3DES-SHA] ENCRYPTION_ALGORITHM= 3DES_CBC HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_1024 Life= Default-phase-1-lifetime # AES [AES-SHA] ENCRYPTION_ALGORITHM= AES_CBC KEY_LENGTH= 128,128:256 HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_1024 Life= Default-phase-1-lifetime # Blowfish [BLF-SHA] ENCRYPTION_ALGORITHM= BLOWFISH_CBC KEY_LENGTH= 128,96:192 HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_1024 Life= Default-phase-1-lifetime # Blowfish, using DH group 4 (non-default) [BLF-SHA-EC185] ENCRYPTION_ALGORITHM= BLOWFISH_CBC KEY_LENGTH= 128,96:192 HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= EC2N_185 Life= Default-phase-1-lifetime # Quick mode protection suites ############################## # DES [QM-ESP-DES-SUITE] Protocols= QM-ESP-DES [QM-ESP-DES-PFS-SUITE] Protocols= QM-ESP-DES-PFS [QM-ESP-DES-MD5-SUITE] Protocols= QM-ESP-DES-MD5 [QM-ESP-DES-MD5-PFS-SUITE] Protocols= QM-ESP-DES-MD5-PFS [QM-ESP-DES-SHA-SUITE] Protocols= QM-ESP-DES-SHA [QM-ESP-DES-SHA-PFS-SUITE] Protocols= QM-ESP-DES-SHA-PFS # 3DES [QM-ESP-3DES-SHA-SUITE] Protocols= QM-ESP-3DES-SHA [QM-ESP-3DES-SHA-PFS-SUITE] Protocols= QM-ESP-3DES-SHA-PFS # AES [QM-ESP-AES-SHA-SUITE] Protocols= QM-ESP-AES-SHA [QM-ESP-AES-SHA-PFS-SUITE] Protocols= QM-ESP-AES-SHA-PFS # AH [QM-AH-MD5-SUITE] Protocols= QM-AH-MD5 [QM-AH-MD5-PFS-SUITE] Protocols= QM-AH-MD5-PFS # AH + ESP (non-default) [QM-AH-MD5-ESP-DES-SUITE] Protocols= QM-AH-MD5,QM-ESP-DES [QM-AH-MD5-ESP-DES-MD5-SUITE] Protocols= QM-AH-MD5,QM-ESP-DES-MD5 [QM-ESP-DES-MD5-AH-MD5-SUITE] Protocols= QM-ESP-DES-MD5,QM-AH-MD5 # Quick mode protocols # DES [QM-ESP-DES] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-DES-XF [QM-ESP-DES-MD5] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-DES-MD5-XF [QM-ESP-DES-MD5-PFS] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-DES-MD5-PFS-XF [QM-ESP-DES-SHA] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-DES-SHA-XF # 3DES [QM-ESP-3DES-SHA] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-3DES-SHA-XF [QM-ESP-3DES-SHA-PFS] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-3DES-SHA-PFS-XF [QM-ESP-3DES-SHA-TRP] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-3DES-SHA-TRP-XF # AES [QM-ESP-AES-SHA] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-AES-SHA-XF [QM-ESP-AES-SHA-PFS] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-AES-SHA-PFS-XF [QM-ESP-AES-SHA-TRP] PROTOCOL_ID= IPSEC_ESP Transforms= QM-ESP-AES-SHA-TRP-XF # AH MD5 [QM-AH-MD5] PROTOCOL_ID= IPSEC_AH Transforms= QM-AH-MD5-XF [QM-AH-MD5-PFS] PROTOCOL_ID= IPSEC_AH Transforms= QM-AH-MD5-PFS-XF # Quick mode transforms # ESP DES+MD5 [QM-ESP-DES-XF] TRANSFORM_ID= DES ENCAPSULATION_MODE= TUNNEL Life= Default-phase-2-lifetime [QM-ESP-DES-MD5-XF] TRANSFORM_ID= DES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_MD5 Life= Default-phase-2-lifetime [QM-ESP-DES-MD5-PFS-XF] TRANSFORM_ID= DES ENCAPSULATION_MODE= TUNNEL GROUP_DESCRIPTION= MODP_1024 AUTHENTICATION_ALGORITHM= HMAC_MD5 Life= Default-phase-2-lifetime [QM-ESP-DES-SHA-XF] TRANSFORM_ID= DES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA Life= Default-phase-2-lifetime # 3DES [QM-ESP-3DES-SHA-XF] TRANSFORM_ID= 3DES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA Life= Default-phase-2-lifetime [QM-ESP-3DES-SHA-PFS-XF] TRANSFORM_ID= 3DES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA GROUP_DESCRIPTION= MODP_1024 Life= Default-phase-2-lifetime [QM-ESP-3DES-SHA-TRP-XF] TRANSFORM_ID= 3DES ENCAPSULATION_MODE= TRANSPORT AUTHENTICATION_ALGORITHM= HMAC_SHA Life= Default-phase-2-lifetime # AES [QM-ESP-AES-SHA-XF] TRANSFORM_ID= AES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA KEY_LENGTH= 128 Life= Default-phase-2-lifetime [QM-ESP-AES-SHA-PFS-XF] TRANSFORM_ID= AES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA GROUP_DESCRIPTION= MODP_1024 KEY_LENGTH= 128 Life= Default-phase-2-lifetime [QM-ESP-AES-SHA-TRP-XF] TRANSFORM_ID= AES ENCAPSULATION_MODE= TRANSPORT AUTHENTICATION_ALGORITHM= HMAC_SHA KEY_LENGTH= 128 Life= Default-phase-2-lifetime # AH [QM-AH-MD5-XF] TRANSFORM_ID= MD5 ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_MD5 Life= Default-phase-2-lifetime [QM-AH-MD5-PFS-XF] TRANSFORM_ID= MD5 ENCAPSULATION_MODE= TUNNEL GROUP_DESCRIPTION= MODP_1024 Life= Default-phase-2-lifetime [Sample-Life-Time] LIFE_TYPE= SECONDS LIFE_DURATION= 3600,1800:7200 [Sample-Life-Volume] LIFE_TYPE= KILOBYTES LIFE_DURATION= 1000,768:1536 .Ed .Sh SEE ALSO .Xr keynote 1 , .Xr openssl 1 , .Xr ipsec 4 , .Xr keynote 4 , .Xr isakmpd.policy 5 , .Xr isakmpd 8 .Sh CAVEATS Using aggressive mode is discouraged due to various design problems. If your peer only supports aggressive mode, please consider replacing that peer with a sane ISAKMP/IKE implementation. For details see .Pa http://www.usenix.org/publications/login/1999-12/features/harmful.html . .Sh BUGS The RFCs do not permit differing DH groups in the same proposal for aggressive and quick mode exchanges. Mixing both PFS and non-PFS suites in a quick mode proposal is not possible, as PFS implies using a DH group.