|Generic global configuration parameters|
|Optional default phase 1 ID name.|
|The default lifetime for autogenerated transforms (phase 1). If unspecified, the value 3600,60:86400 is used as the default.|
|The default lifetime for autogenerated suites (phase 2). If unspecified, the value 1200,60:86400 is used as the default.|
|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.|
|If this tag is defined, isakmpd will not set up flows automatically. This is useful when flows are configured with ipsecadm(4) or by other programs like bgpd(8). Thus isakmpd only takes care of the SA establishment.|
|The interval between watchdog checks of connections we want up at all times.|
|The interval between RFC 3706 (Dead Peer Detection) messages. The default value is 0 (zero), which means DPD is disabled.|
|How many seconds should an exchange maximally take to set up before we give up.|
|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 wont see if an address given here does not exist on this host, and thus no error is given for that case.|
|A list of the form class = level, where both class and level are numbers. This is similar to the -D command line switch of isakmpd. See isakmpd(8) for details.|
|If this tag is defined, whatever the value is, verbose logging is enabled. This is similar to the -v command line switch of isakmpd. See isakmpd(8) for details.|
|The number of seconds between NAT-T keepalive messages, sent by the peer behind NAT to keep the mapping active. Defaults to 20.|
|The name of the file that contains keynote(4) policies. The default is "/usr/local/etc/isakmpd/isakmpd.policy".|
|The directory in which isakmpd.conf looks for explicitly trusted public keys. The default is "/usr/local/etc/isakmpd/pubkeys". Read isakmpd(8) for the required naming convention of the files in here.|
|If this tag is defined, whatever the value is, isakmpd will renegotiate all current phase 2 SAs when the daemon receives a SIGHUP signal, or an 'R' is sent to the FIFO interface (see isakmpd(8)).|
|How many times should a message be retransmitted before giving up.|
|If this tag is defined, whatever the value is, some semantics of isakmpd.conf 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.|
|This tag controls the use of keynote(4) policy checking. The default value is "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 ipsecadm(8) or bgpd(8).|
|ISAKMP SA negotiation parameter root|
|A name of the ISAKMP peer at the given IP-address.|
|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 <ISAKMP-peer> below.|
|IPsec SA negotiation parameter root|
|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 <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: "Active-only" that disables this behaviour. This too is mentioned in the <IPsec-connection> section, in the "Flags" tag.|
|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 <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.|
A directory containing directories named after IDs (IP
or hostnames) that contain files named
The credentials file contains 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 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 keynote(1) utility.
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.
|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.|
|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 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.|
|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, as provided by certpatch(8).|
|The private key matching the public key of our certificate (which should be in the "Cert-directory", and have an appropriate subjectAltName field).|
<ISAKMP-peer> Parameters for negotiation with an ISAKMP peer Phase The constant 1, as ISAKMP-peers and IPsec-connections really are handled by the same code inside isakmpd. Transport The name of the transport protocol, defaults to UDP. 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. Local-address The Local IP-address to use, if we are multi-homed, or have aliases. Address If existent, the IP-address of the peer. Configuration The name of the ISAKMP-configuration section to use. Look at <ISAKMP-configuration> below. If unspecified, defaults to "Default-phase-1-configuration". Authentication If existent, authentication data for this specific peer. In the case of preshared key, this is the key value itself. 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 <Phase1-ID> below. 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 <Phase1-ID> below. Flags A comma-separated list of flags controlling the further handling of the ISAKMP SA. Currently there are no specific ISAKMP SA flags defined.
<Phase1-ID> ID-type The ID type as given by the RFC specifications. For phase 1 this is currently IPV4_ADDR, IPV4_ADDR_SUBNET, IPV6_ADDR, IPV6_ADDR_SUBNET, FQDN, USER_FQDN or KEY_ID. Address If the ID-type is IPV4_ADDR or IPV6_ADDR, this tag should exist and be an IP-address. Network If the ID-type is IPV4_ADDR_SUBNET or IPV6_ADDR_SUBNET this tag should exist and be a network address. Netmask If the ID-type is IPV4_ADDR_SUBNET or IPV6_ADDR_SUBNET this tag should exist and be a network subnet mask. Name If the ID-type is FQDN, USER_FQDN or KEY_ID, this tag should exist and contain a domain name, user@domain, or other identifying string respectively.
In the case of KEY_ID, note that the IKE protocol allows any octet sequence to be sent or received under this payload, potentially including non-printable ones. isakmpd(8) can only transmit printable KEY_ID payloads, but can receive and process arbitrary KEY_ID payloads. This effectively means that non-printable KEY_ID remote identities cannot be verified through this means, although it is still possible to do so through isakmpd.policy(5).
<ISAKMP-configuration> DOI The domain of interpretation as given by the RFCs. Normally IPSEC. If unspecified, defaults to IPSEC. EXCHANGE_TYPE The exchange type as given by the RFCs. For main mode this is ID_PROT and for aggressive mode it is AGGRESSIVE. 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 <ISAKMP-transform> below.
<ISAKMP-transform> ENCRYPTION_ALGORITHM The encryption algorithm as the RFCs name it, or ANY to denote that any encryption algorithm proposed will be accepted. 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. HASH_ALGORITHM The hash algorithm as the RFCs name it, or ANY. AUTHENTICATION_METHOD The authentication method as the RFCs name it, or ANY. GROUP_DESCRIPTION The group used for Diffie-Hellman exponentiations, or ANY. The names are symbolic, like MODP_768, MODP_1024, EC_155 and EC_185. PRF The algorithm to use for the keyed pseudo-random function (used for key derivation and authentication in phase 1), or ANY. 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 <Lifetime> below. If it is set to ANY, then any type of proposed lifetime type and value will be accepted.
<Lifetime> LIFE_TYPE SECONDS or KILOBYTES depending on the type of the duration. Notice that this field may NOT be set to ANY. LIFE_DURATION An offer/accept kind of value, see above. Can also be set to ANY.
<IPsec-connection> Phase The constant 2, as ISAKMP-peers and IPsec-connections really are handled by the same code inside isakmpd. 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 <ISAKMP-peer> section. See above. Configuration The name of the IPsec-configuration section to use. Look at <IPsec-configuration> below. 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 <IPsec-connection> we are dealing with. Look at <IPsec-ID> below. 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 <IPsec-connection> we are dealing with. Look at <IPsec-ID> below. Flags A comma-separated list of flags controlling the further handling of the IPsec SA. Currently only one flag is defined: Active-only If this flag is given and this <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.
<IPsec-configuration> DOI The domain of interpretation as given by the RFCs. Normally IPSEC. If unspecified, defaults to IPSEC. EXCHANGE_TYPE The exchange type as given by the RFCs. For quick mode this is QUICK_MODE. 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 <IPsec-suite> section. See below.
<IPsec-suite> Protocols A list of the protocols included in this protection suite. Each of the list elements is a name of an <IPsec-protocol> section. See below.
<IPsec-protocol> PROTOCOL_ID The protocol as given by the RFCs. Acceptable values today are IPSEC_AH and IPSEC_ESP. Transforms A list of transforms usable for implementing the protocol. Each of the list elements is a name of an <IPsec-transform> section. See below. 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.
<IPsec-transform> TRANSFORM_ID The transform ID as given by the RFCs. ENCAPSULATION_MODE The encapsulation mode as given by the RFCs. This means TRANSPORT or TUNNEL. AUTHENTICATION_ALGORITHM The optional authentication algorithm in the case of this being an ESP transform. GROUP_DESCRIPTION An optional (provides PFS if present) Diffie-Hellman group description. The values are the same as GROUP_DESCRIPTIONs in <ISAKMP-transform> sections shown above. Life List of lifetimes, each element is a <Lifetime> section name.
<IPsec-ID> ID-type The ID type as given by the RFCs. For IPsec this is currently IPV4_ADDR, IPV6_ADDR, IPV4_ADDR_SUBNET or IPV6_ADDR_SUBNET. Address If the ID-type is IPV4_ADDR or IPV6_ADDR this tag should exist and be an IP-address. Network If the ID-type is IPV4_ADDR_SUBNET or IPV6_ADDR_SUBNET this tag should exist and be a network address. Netmask If the ID-type is IPV4_ADDR_SUBNET or IPV6_ADDR_SUBNET this tag should exist and be a network subnet mask. Protocol If the ID-type is IPV4_ADDR, IPV4_ADDR_SUBNET, IPV6_ADDR or 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. Port If the ID-type is IPV4_ADDR, IPV4_ADDR_SUBNET, IPV6_ADDR or 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 Protocol tag must be specified in conjunction with this tag.
<IKECFG-ID> Parameters to use with IKE mode-config. One ID per peer.
An IKECFG-ID is written as [<ID-type>/<name>]. The following ID types are supported:
IPv4 [ipv4/A.B.C.D] IPv6 [ipv6/abcd:abcd::ab:cd] FQDN [fqdn/foo.bar.org] UFQDN [firstname.lastname@example.org] ASN1_DN [asn1_dn//C=aa/O=cc/...] (Note the double slashes as the DN itself starts with a '/.')
Each section specifies what configuration values to return to the peer requesting IKE mode-config. Currently supported values are:
Address The peers network address. Netmask The peers netmask. Nameserver The IP address of a DNS nameserver. WINS-server The IP address of a WINS server.
During phase 1 negotiation isakmpd looks for a pre-shared key in the <ISAKMP-peer> section. If no Authentication data is specified in that section, and isakmpd is not the initiator, it looks for Authentication data in a section named after the initiators phase 1 ID. This allows mobile users with dynamic IP addresses to have different shared secrets.
This only works for aggressive mode because in main mode the remote initiator ID would not yet be known.
The name of the <Initiator-ID> section depends on the ID type sent by the initiator. Currently this can be:
IPv4 [A.B.C.D] IPv6 [abcd:abcd::ab:cd] FQDN [foo.bar.org] UFQDN [email@example.com]
/usr/local/etc/isakmpd/isakmpd.conf The default isakmpd configuration file. /usr/share/ipsec/isakmpd/ A directory containing some sample isakmpd configuration files.
An example of a configuration file:# 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 initiators 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= /usr/local/etc/isakmpd/isakmpd.policy Retransmits= 3 Exchange-max-time= 120
# KeyNote credential storage [KeyNote] Credential-directory= /usr/local/etc/isakmpd/keynote/
# Certificates stored in PEM format [X509-certificates] CA-directory= /usr/local/etc/isakmpd/ca/ Cert-directory= /usr/local/etc/isakmpd/certs/ CRL-directory= /usr/local/etc/isakmpd/crls/ Private-key= /usr/local/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-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-SHA] ENCRYPTION_ALGORITHM= 3DES_CBC HASH_ALGORITHM= SHA AUTHENTICATION_METHOD= PRE_SHARED GROUP_DESCRIPTION= MODP_1024 Life= Default-phase-1-lifetime
[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 ##############################
[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
[QM-ESP-3DES-SHA-SUITE] Protocols= QM-ESP-3DES-SHA
[QM-ESP-3DES-SHA-PFS-SUITE] Protocols= QM-ESP-3DES-SHA-PFS
[QM-ESP-AES-SHA-SUITE] Protocols= QM-ESP-AES-SHA
[QM-ESP-AES-SHA-PFS-SUITE] Protocols= QM-ESP-AES-SHA-PFS
[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
[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
[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
[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
[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
[QM-ESP-AES-SHA-XF] TRANSFORM_ID= AES ENCAPSULATION_MODE= TUNNEL AUTHENTICATION_ALGORITHM= HMAC_SHA 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 Life= Default-phase-2-lifetime
[QM-ESP-AES-SHA-TRP-XF] TRANSFORM_ID= AES ENCAPSULATION_MODE= TRANSPORT AUTHENTICATION_ALGORITHM= HMAC_SHA Life= Default-phase-2-lifetime
[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
keynote(1), ipsec(4), keynote(4), isakmpd.policy(5), isakmpd(8)
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.