.\" $KAME: racoon.conf.5,v 1.102 2003/04/07 00:46:19 itojun Exp $
.\"
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.\" SUCH DAMAGE.
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.Dd November 20, 2000
.Dt RACOON.CONF 5
.Os KAME
.\"
.Sh NAME
.Nm racoon.conf
.Nd configuration file for racoon
.\"
.\" .Sh SYNOPSIS
.\"
.Sh DESCRIPTION
.Nm
is the configuration file for the
.Xr racoon 8
ISAKMP daemon.
.Xr racoon 8
negotiates security associations for itself (ISAKMP SA, or phase 1 SA)
and for kernel IPsec (IPsec SA, or phase 2 SA).
The file consists of a sequence of directives and statements.
Each directive is composed by a tag, and statements are enclosed by
.Ql {
and
.Ql } .
Lines beginning with
.Ql #
are comments.
.\"
.Ss Meta Syntax
Keywords and special characters that the parser expects exactly are
displayed using
.Ic this
font.
Parameters are specified with
.Ar this
font.
Square brackets
.Po
.Ql \*(lB
and
.Ql \*(rB
.Pc
are used to show optional keywords and parameters.
Note that
you have to pay attention when this manual is describing
.Ar port
numbers.
The
.Ar port
number is always enclosed by
.Ql \*(lB
and
.Ql \*(rB .
In this case, the port number is not an optional keyword.
If it is possible to omit
.Ar port
number,
the expression becomes
.Bq Ic Bq Ar port .
The vertical bar
.Pq Ql \*(Ba
is used to indicate
a choice between optional parameters.
Parentheses
.Po
.Ql \*(lP
and
.Ql \*(rP
.Pc
are used to group keywords and parameters when necessary.
Major parameters are listed below.
.Pp
.Bl -tag -width addressx -compact
.It Ar number
means a hexadecimal or a decimal number.
The former must be prefixed with
.Ql Li 0x .
.It Ar string
.It Ar path
.It Ar file
means any string enclosed in
.Ql \&"
.Pq double quote .
.It Ar address
means IPv6 and/or IPv4 address.
.It Ar port
means a TCP/UDP port number.
The port number is always enclosed by
.Ql \*(lB
and
.Ql \*(rB .
.It Ar timeunit
is one of following:
.Ic sec , secs , second , seconds ,
.Ic min , mins , minute , minutes ,
.Ic hour , hours .
.El
.\"
.Ss Path Specification
.Bl -tag -width Ds -compact
.It Ic path include Ar path ;
specifies a path to include a file.
See
.Sx File Inclusion .
.It Ic path pre_shared_key Ar file ;
specifies a file containing pre-shared key(s) for various ID(s).
See
.Sx Pre-shared key File .
.It Ic path certificate Ar path ;
.Xr racoon 8
will search this directory if a certificate or certificate request is received.
.It Ic path backupsa Ar file ;
specifies a file to be stored a SA information which is negotiated by racoon.
.Xr racoon 8
will install SA(s) from the file with a boot option
.Fl B .
The file is increasing because
.Xr racoon 8
simply add a SA to the file at the moment.
You should maintain the file manually.
.El
.\"
.Ss File Inclusion
.Bl -tag -width Ds -compact
.It Ic include Ar file
other configuration files can be included.
.El
.\"
.Ss Identifier Specification
is obsolete.
It must be defined at each
.Ic remote
directive.
.\"
.Ss Timer Specification
.Bl -tag -width Ds -compact
.It Ic timer { Ar statements Ic }
specifies various timer values.
.Pp
.Bl -tag -width Ds -compact
.It Ic counter Ar number ;
the maximum number of retries to send.
The default is 5.
.It Ic interval Ar number Ar timeunit ;
the interval to resend, in seconds.
The default time is 10 seconds.
.It Ic persend Ar number ;
the number of packets per send.
The default is 1.
.It Ic phase1 Ar number Ar timeunit ;
the maximum time it should take to complete phase 1.
The default time is 15 seconds.
.It Ic phase2 Ar number Ar timeunit ;
the maximum time it should take to complete phase 2.
The default time is 10 seconds.
.El
.El
.\"
.Ss Listening Port Specification
.Bl -tag -width Ds -compact
.It Ic listen { Ar statements Ic }
If no
.Ar listen
directive is specified,
.Xr racoon 8
will listen on all of the available interface addresses.
The following is the list of valid statements:
.Pp
.Bl -tag -width Ds -compact
.\" How do I express bold brackets; `[' and `]' .
.\" Is the "Bq Ic [ Ar port ] ;" buggy ?
.It Ic isakmp Ar address Bq Bq Ar port ;
If this is specified,
.Xr racoon 8
will only listen on
.Ar address .
The default port is 500, which is specified by IANA.
You can provide more than one address definition.
.It Ic strict_address ;
require that all addresses for ISAKMP must be bound.
This statement will be ignored if you do not specify any addresses.
.El
.El
.\"
.Ss Remote Nodes Specifications
.Bl -tag -width Ds -compact
.It Xo
.Ic remote ( Ar address \*(Ba Ic anonymous )
.Bq Bq Ar port
.Ic { Ar statements Ic }
.Xc
specifies the parameters for IKE phase 1 for each remote node.
The default port is 500.
If
.Ic anonymous
is specified, the statements apply to all peers which do not match
any other
.Ic remote
directive.
.Pp
The following are valid statements.
.Pp
.Bl -tag -width Ds -compact
.\"
.It Ic exchange_mode ( main \*(Ba aggressive \*(Ba base ) ;
defines the exchange mode for phase 1 when racoon is the initiator.
Also it means the acceptable exchange mode when racoon is responder.
More than one mode can be specified by separating them with a comma.
All of the modes are acceptable.
The first exchange mode is what racoon uses when it is the initiator.
.\"
.It Ic doi Ic ipsec_doi ;
means to use IPsec-DOI as specified RFC 2407.
You can omit this statement.
.\"
.It Ic situation Ic identity_only ;
means to use SIT_IDENTITY_ONLY as specified RFC 2407.
You can omit this statement.
.\"
.It Ic identifier Ar idtype ;
is obsolete.
Instead, use
.Ic my_identifier .
.\"
.It Ic my_identifier Ar idtype ... ;
specifies the identifier sent to the remote host
and the type to use in the phase 1 negotiation.
.Ic address, fqdn , user_fqdn , keyid and asn1dn
can be used as an
.Ar idtype .
they are used like:
.Bl -tag -width Ds -compact
.It Ic my_identifier Ic address Bq Ar address ;
the type is the IP address.
This is the default type if you do not specify an identifier to use.
.It Ic my_identifier Ic user_fqdn Ar string ;
the type is a USER_FQDN (user fully-qualified domain name).
.It Ic my_identifier Ic fqdn Ar string ;
the type is a FQDN (fully-qualified domain name).
.It Ic my_identifier Ic keyid Ar file ;
the type is a KEY_ID.
.It Ic my_identifier Ic asn1dn Bq Ar string ;
the type is an ASN.1 distinguished name.
If
.Ar string
is omitted,
.Xr racoon 8
will get DN from Subject field in the certificate.
.El
.\"
.It Ic peers_identifier Ar idtype ... ;
specifies the peer's identifier to be received.
If it is not defined then
.Xr racoon 8
will not verify the peer's identifier in ID payload transmitted from the peer.
If it is defined, the behavior of the verification depends on the flag of
.Ic verify_identifier .
The usage of
.Ar idtype
is same to
.Ic my_identifier .
.\"
.It Ic verify_identifier (on \(ba off) ;
If you want to verify the peer's identifier,
set this to on.
In this case, if the value defined by
.Ic peers_identifier
is not same to the peer's identifier in the ID payload,
the negotiation will failed.
The default is off.
.\"
.It Ic certificate_type Ar certspec ;
specifies a certificate specification.
.Ar certspec
is one of followings:
.Bl -tag -width Ds -compact
.It Ic x509 Ar certfile Ar privkeyfile;
.Ar certfile
means a file name of certificate.
.Ar privkeyfile
means a file name of secret key.
.El
.\"
.It Ic peers_certfile ( dnssec \*(Ba Ar certfile ) ;
If
.Ic dnssec
is defined,
.Xr racoon 8
will ignore the CERT payload from the peer,
and try to get the peer's certificate from DNS instead.
If
.Ar certfile
is defined,
.Xr racoon 8
will ignore the CERT payload from the peer,
and will use this certificate as the peer's certificate.
.\"
.It Ic send_cert (on \(ba off) ;
If you do not want to send a certificate for some reason, set this to off.
The default is on.
.\"
.It Ic send_cr (on \(ba off) ;
If you do not want to send a certificate request for some reason, set this to off.
The default is on.
.\"
.It Ic verify_cert (on \(ba off) ;
If you do not want to verify the peer's certificate for some reason,
set this to off.
The default is on.
.\"
.It Ic lifetime time Ar number Ar timeunit ;
define a lifetime of a certain time
which will be proposed in the phase 1 negotiations.
Any proposal will be accepted, and the attribute(s) will be not proposed to
the peer if you do not specify it(them).
They can be individually specified in each proposal.
.\"
.It Ic initial_contact (on \(ba off) ;
enable this to send an INITIAL-CONTACT message.
The default value is
.Ic on .
This message is useful only when
the implementation of the responder choices an old SA when there are multiple
SAs which are different established time, and the initiator reboots.
If racoon did not use the message,
the responder would use an old SA even when an new SA was established.
The KAME stack has the switch in the system wide value,
net.key.preferred_oldsa.
when the value is zero, the stack always use an new SA.
.\"
.It Ic passive (on \(ba off) ;
If you do not want to initiate the negotiation, set this to on.
The default value is
.Ic off .
It is useful for a server.
.\"
.It Ic proposal_check Ar level ;
specifies the action of lifetime length and PFS of the phase 2
selection on the responder side.
The default level is
.Ic strict .
If the
.Ar level
is;
.Bl -tag -width Ds -compact
.It Ic obey
the responder will obey the initiator anytime.
.It Ic strict
If the responder's length is longer than the initiator's one, the
responder uses the initiator's one.
Otherwise it rejects the proposal.
If PFS is not required by the responder, the responder will obey the proposal.
If PFS is required by both sides and if the responder's group is not equal to
the initiator's one, then the responder will reject the proposal.
.It Ic claim
If the responder's length is longer than the initiator's one, the
responder will use the initiator's one.
If the responder's length is
shorter than the initiator's one, the responder uses its own length
AND sends a RESPONDER-LIFETIME notify message to an initiator in the
case of lifetime.
About PFS, this directive is same as
.Ic strict .
.It Ic exact
If the initiator's length is not equal to the responder's one, the
responder will reject the proposal.
If PFS is required by both sides and if the responder's group is not equal to
the initiator's one, then the responder will reject the proposal.
.El
.\"
.It Ic support_mip6 (on \(ba off) ;
If this value is set on then both values of ID payloads in phase 2 exchange
are always used as the addresses of end-point of IPsec-SAs.
The default is off.
.\"
.It Ic generate_policy (on \(ba off) ;
This directive is for the responder.
Therefore you should set
.Ic passive
on in order that
.Xr racoon 8
only becomes a responder.
If the responder does not have any policy in SPD during phase 2 negotiation,
and the directive is set on, then
.Xr racoon 8
will choice the first proposal in the
SA payload from the initiator, and generate policy entries from the proposal.
It is useful to negotiate with the client which is allocated IP address
dynamically.
Note that inappropriate policy might be installed into the responder's SPD
by the initiator.
So that other communication might fail if such policies installed
due to some policy mismatches between the initiator and the responder.
This directive is ignored in the initiator case.
The default value is
.Ic off .
.\"
.It Ic nonce_size Ar number ;
define the byte size of nonce value.
Racoon can send any value although
RFC2409 specifies that the value MUST be between 8 and 256 bytes.
The default size is 16 bytes.
.\"
.It Xo
.Ic proposal { Ar sub-substatements Ic }
.Xc
.Bl -tag -width Ds -compact
.\"
.It Ic encryption_algorithm Ar algorithm ;
specify the encryption algorithm used for the phase 1 negotiation.
This directive must be defined.
.Ar algorithm
is one of following:
.Ic des , 3des , blowfish , cast128
.\".Ic rc5 , idea
for oakley.
For other transforms, this statement should not be used.
.\"
.It Ic hash_algorithm Ar algorithm;
define the hash algorithm used for the phase 1 negotiation.
This directive must be defined.
.Ar algorithm
is one of following:
.Ic md5, sha1
for oakley.
.\"
.It Ic authentication_method Ar type ;
defines the authentication method used for the phase 1 negotiation.
This directive must be defined.
.Ar type
is one of:
.Ic pre_shared_key, rsasig , gssapi_krb .
.\"
.It Ic dh_group Ar group ;
define the group used for the Diffie-Hellman exponentiations.
This directive must be defined.
.Ar group
is one of following:
.Ic modp768 , modp1024 , modp1536 .
Or you can define 1, 2, or 5 as the DH group number.
When you want to use aggressive mode,
you must define same DH group in each proposal.
.It Ic lifetime time Ar number Ar timeunit ;
define lifetime of the phase 1 SA proposal.
Refer to the description of
.Ic lifetime
directive immediately defined in
.Ic remote
directive.
.It Ic gssapi_id Ar string ;
define the GSS-API endpoint name, to be included as an attribute in the SA,
if the
.Ic gssapi_krb
authentication method is used. If this is not defined, the default value of
.Ql ike/hostname
is used, where hostname is the FQDN of the interface being used.
.El
.El
.El
.\"
.Ss Policy Specifications
The policy directive is obsolete, policies are now in the SPD.
.Xr racoon 8
will obey the policy configured into the kernel by
.Xr setkey 8 ,
and will construct phase 2 proposals by combining
.Ic sainfo
specifications in
.Nm Ns ,
and policies in the kernel.
.\"
.Ss Sainfo Specifications
.Bl -tag -width Ds -compact
.It Xo
.Ic sainfo ( Ar source_id destination_id \*(Ba Ic anonymous )
.Ic { Ar statements Ic }
.Xc
defines the parameters of the IKE phase 2 (IPsec-SA establishment).
.Ar source_id
and
.Ar destination_id
are constructed like:
.Pp
.Ic address Ar address
.Bq Ic / Ar prefix
.Bq Ic [ Ar port ]
.Ar ul_proto
.Pp
or
.Pp
.Ar idtype Ar string
.Pp
It means exactly the content of ID payload.
This is not like a filter rule.
For example, if you define 3ffe:501:4819::/48 as
.Ar source_id .
3ffe:501:4819:1000:/64 will not match.
.Pp
.Bl -tag -width Ds -compact
.\"
.It Ic pfs_group Ar group ;
define the group of Diffie-Hellman exponentiations.
If you do not require PFS then you can omit this directive.
Any proposal will be accepted if you do not specify one.
.Ar group
is one of following:
.Ic modp768 , modp1024 , modp1536 .
Or you can define 1, 2, or 5 as the DH group number.
.\"
.It Ic lifetime time Ar number Ar timeunit ;
define the lifetime of amount of time
which are to be used IPsec-SA.
Any proposal will be accepted, and no attribute(s) will be proposed to
the peer if you do not specify it(them).
See the
.Ic proposal_check
directive.
.\"
.It Ic my_identifier Ar idtype ... ;
is obsolete.
It does not make sense to specify a identifier in the phase 2.
.El
.\"
.Pp
.Xr racoon 8
does not have the list of security protocols to be negotiated.
The list of security protocols are passed by SPD in the kernel.
Therefore you have to define all of the potential algorithms
in the phase 2 proposals even if there is a algorithm which will not be used.
These algorithms are define by using the following three directives,
and they are lined with single comma as the separator.
For algorithms that can take variable-length keys, algorithm names
can be followed by a key length, like
.Dq Li blowfish 448 .
.Xr racoon 8
will compute the actual phase 2 proposals by computing
the permutation of the specified algorithms,
and then combining them with the security protocol specified by the SPD.
For example, if
.Ic des, 3des, hmac_md5,
and
.Ic hmac_sha1
are specified as algorithms, we have four combinations for use with ESP,
and two for AH.
Then, based on the SPD settings,
.Xr racoon 8
will construct the actual proposals.
If the SPD entry asks for ESP only, there will be 4 proposals.
If it asks for both AH and ESP, there will be 8 proposals.
Note that the kernel may not support the algorithm you have specified.
.\"
.Bl -tag -width Ds -compact
.It Ic encryption_algorithm Ar algorithms ;
.Ic des , 3des , des_iv64 , des_iv32 ,
.Ic rc5 , rc4 , idea , 3idea ,
.Ic cast128 , blowfish , null_enc ,
.Ic twofish , rijndael
.Pq used with ESP
.\"
.It Ic authentication_algorithm Ar algorithms ;
.Ic des , 3des , des_iv64 , des_iv32 ,
.Ic hmac_md5 , hmac_sha1 , non_auth
.Pq used with ESP authentication and AH
.\"
.It Ic compression_algorithm Ar algorithms ;
.Ic deflate
.Pq used with IPComp
.El
.El
.\"
.Ss Logging level
.Bl -tag -width Ds -compact
.It Ic log Ar level ;
define logging level.
.Ar level
is one of following:
.Ic notify , debug
and
.Ic debug2 .
The default is
.Ic notify .
If you put too high logging level on slower machines,
IKE negotiation can fail due to timing constraint changes.
.El
.\"
.Ss Specifying the way to pad
.Bl -tag -width Ds -compact
.It Ic padding { Ar statements Ic }
specified padding format.
The following are valid statements:
.Bl -tag -width Ds -compact
.It Ic randomize (on \(ba off) ;
enable using a randomized value for padding.
The default is on.
.It Ic randomize_length (on \(ba off) ;
the pad length is random.
The default is off.
.It Ic maximum_length Ar number ;
define a maximum padding length.
If
.Ic randomize_length is off, this is ignored.
The default is 20 bytes.
.It Ic exclusive_tail (on \(ba off) ;
means to put the number of pad bytes minus one into last part of the padding.
The default is on.
.It Ic strict_check (on \(ba off) ;
means to be constrained the peer to set the number of pad bytes.
The default is off.
.El
.El
.Ss Special directives
.Bl -tag -width Ds -compact
.It Ic complex_bundle (on \(ba off) ;
defines the interpretation of proposal in the case of SA bundle.
Normally
.Dq IP AH ESP IP payload
is proposed as
.Dq AH tunnel and ESP tunnel .
The interpretation is more common to other IKE implementations, however,
it allows very limited set of combinations for proposals.
With the option enabled, it will be proposed as
.Dq AH transport and ESP tunnel .
The default value is
.Ic off .
.El
.\"
.Ss Pre-shared key File
Pre-shared key file defines a pair of the identifier and the shared secret key
which are used at Pre-shared key authentication method in phase 1.
The pair in each lines are separated by some number of blanks and/or tab
characters like
.Xr hosts 5 .
Key can be included any blanks because all of the words after 2nd column
are interpreted as a secret key.
Lines start with
.Ql #
are ignored.
Keys which start with
.Ql 0x
are hexa-decimal strings.
Note that the file must be owned by the user ID running
.Xr racoon 8
.Pq usually the privileged user ,
and must not be accessible by others.
.\"
.Sh EXAMPLES
The following shows how the remote directive should be configured.
.Bd -literal -offset
path pre_shared_key "/usr/local/v6/etc/psk.txt" ;
remote anonymous
{
exchange_mode aggressive,main,base;
lifetime time 24 hour;
proposal {
encryption_algorithm 3des;
hash_algorithm sha1;
authentication_method pre_shared_key;
dh_group 2;
}
}
sainfo anonymous
{
pfs_group 2;
lifetime time 12 hour ;
encryption_algorithm 3des, blowfish 448, twofish, rijndael ;
authentication_algorithm hmac_sha1, hmac_md5 ;
compression_algorithm deflate ;
}
.Ed
.Pp
The following is a sample of the file defined pre-shared key.
.Bd -literal -offset
10.160.94.3 mekmitasdigoat
172.16.1.133 0x12345678
194.100.55.1 whatcertificatereally
3ffe:501:410:ffff:200:86ff:fe05:80fa mekmitasdigoat
3ffe:501:410:ffff:210:4bff:fea2:8baa mekmitasdigoat
foo@kame.net mekmitasdigoat
foo.kame.net hoge
.Ed
.\"
.Sh SEE ALSO
.\".Xr racoonctl 8 ,
.Xr racoon 8 ,
.Xr setkey 8
.\"
.Sh HISTORY
The
.Nm
configuration file first appeared in
.Dq YIPS
Yokogawa IPsec implementation.
.\"
.Sh BUGS
Some statements may not be handled by
.Xr racoon 8
yet.