144 lines
4.3 KiB
Groff
144 lines
4.3 KiB
Groff
.\" $Id: kdc.8,v 1.13 2001/06/08 21:35:32 joda Exp $
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.\"
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.Dd July 27, 1997
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.Dt KDC 8
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.Os HEIMDAL
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.Sh NAME
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.Nm kdc
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.Nd Kerberos 5 server
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.Sh SYNOPSIS
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.Nm
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.Oo Fl c Ar file \*(Ba Xo
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.Fl -config-file= Ns Ar file
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.Xc
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.Oc
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.Op Fl p | Fl -no-require-preauth
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.Op Fl -max-request= Ns Ar size
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.Op Fl H | Fl -enable-http
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.Oo Fl r Ar string \*(Ba Xo
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.Fl -v4-realm= Ns Ar string
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.Xc
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.Oc
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.Op Fl K | Fl -no-kaserver
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.Op Fl r Ar realm
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.Op Fl -v4-realm= Ns Ar realm
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.Oo Fl P Ar string \*(Ba Xo
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.Fl -ports= Ns Ar string
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.Xc
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.Oc
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.Op Fl -addresses= Ns Ar list of addresses
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.Sh DESCRIPTION
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.Nm
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serves requests for tickets. When it starts, it first checks the flags
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passed, any options that are not specified with a command line flag is
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taken from a config file, or from a default compiled-in value.
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.Pp
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Options supported:
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.Bl -tag -width Ds
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.It Fl c Ar file
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.It Fl -config-file= Ns Ar file
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Specifies the location of the config file, the default is
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.Pa /var/heimdal/kdc.conf .
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This is the only value that can't be specified in the config file.
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.It Fl p
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.It Fl -no-require-preauth
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Turn off the requirement for pre-autentication in the initial AS-REQ
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for all principals. The use of pre-authentication makes it more
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difficult to do offline password attacks. You might want to turn it
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off if you have clients that doesn't do pre-authentication. Since the
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version 4 protocol doesn't support any pre-authentication, so serving
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version 4 clients is just about the same as not requiring
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pre-athentication. The default is to require
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pre-authentication. Adding the require-preauth per principal is a more
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flexible way of handling this.
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.It Xo
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.Fl -max-request= Ns Ar size
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.Xc
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Gives an upper limit on the size of the requests that the kdc is
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willing to handle.
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.It Xo
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.Fl H Ns ,
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.Fl -enable-http
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.Xc
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Makes the kdc listen on port 80 and handle requests encapsulated in HTTP.
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.It Xo
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.Fl K Ns ,
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.Fl -no-kaserver
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.Xc
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Disables kaserver emulation (in case it's compiled in).
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.It Fl r Ar realm
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.It Fl -v4-realm= Ns Ar realm
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What realm this server should act as when dealing with version 4
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requests. The database can contain any number of realms, but since the
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version 4 protocol doesn't contain a realm for the server, it must be
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explicitly specified. The default is whatever is returned by
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.Fn krb_get_lrealm .
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This option is only availabe if the KDC has been compiled with version
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4 support.
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.It Xo
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.Fl P Ar string Ns ,
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.Fl -ports= Ns Ar string
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.Xc
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Specifies the set of ports the KDC should listen on. It is given as a
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white-space separated list of services or port numbers.
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.It Xo
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.Fl -addresses= Ns Ar list of addresses
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.Xc
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The list of addresses to listen for requests on. By default, the kdc
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will listen on all the locally configured addresses. If only a subset
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is desired, or the automatic detection fails, this option might be used.
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.El
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.Pp
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All activities , are logged to one or more destinations, see
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.Xr krb5.conf 5 ,
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and
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.Xr krb5_openlog 3 .
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The entity used for logging is
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.Nm kdc .
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.Sh CONFIGURATION FILE
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The configuration file has the same syntax as the
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.Pa krb5.conf
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file (you can actually put the configuration in
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.Pa /etc/krb5.conf ,
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and then start the KDC with
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.Fl -config-file= Ns Ar /etc/krb5.conf ) .
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All options should be in a section called
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.Dq kdc .
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All the command-line options can preferably be added in the
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configuration file. The only difference is the pre-authentication flag,
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that has to be specified as:
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.Pp
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.Dl require-preauth = no
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.Pp
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(in fact you can specify the option as
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.Fl -require-preauth=no ) .
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.Pp
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And there are some configuration options which do not have
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command-line equivalents:
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.Bl -tag -width "xxx" -offset indent
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.It Li check-ticket-addresses = Va boolean
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Check the addresses in the ticket when processing TGS requests. The
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default is FALSE.
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.It Li allow-null-ticket-addresses = Va boolean
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Permit tickets with no addresses. This option is only relevant when
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check-ticket-addresses is TRUE.
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.It Li allow-anonymous = Va boolean
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Permit anonymous tickets with no addresses.
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.It encode_as_rep_as_tgs_rep = Va boolean
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Encode AS-Rep as TGS-Rep to be bug-compatible with old DCE code. The
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Heimdal clients allow both.
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.It kdc_warn_pwexpire = Va time
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How long before password/principal expiration the KDC should start
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sending out warning messages.
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.El
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.Pp
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An example of a config file:
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.Bd -literal -offset indent
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[kdc]
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require-preauth = no
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v4-realm = FOO.SE
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key-file = /key-file
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.Ed
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.Sh SEE ALSO
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.Xr kinit 1
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