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.TH KDC.CONF 5 "Kerberos Version 5.0" "MIT Project Athena"
.SH NAME
kdc.conf \- Kerberos V5 KDC configuration file
.SH DESCRIPTION
.I kdc.conf
specifies per-realm configuration data to be used by the Kerberos V5
Authentication Service and Key Distribution Center (AS/KDC).  This
includes database, key and per-realm defaults.
.PP
The 
.I kdc.conf
file uses the same format as the
.I krb5.conf
file.  For a basic description of the syntax, please refer to the
.I krb5.conf
description.
.PP
The following sections are currently used in the
.I kdc.conf
file:
.IP [kdcdefaults]
Contains parameters which control the overall behaviour of the KDC.
.IP [realms]
Contains subsections keyed by Kerberos realm names which describe per-realm
KDC parameters.
.SH KDCDEFAULTS SECTION
The following relations are defined in the
.I [kdcdefaults]
section:
.IP primary_ports
This relation lists the primary ports (e.g. ports to serve Kerberos version
5 requests) to listen on.  This list is a comma separated list of integers.
If supplied, this list serves as a base list of ports to listen on.  If any
other ports are named in the
.I [realms]
section explicitly; or are named by
.B kdc
relations specifying this host in the
.I krb5.conf
file specified in the
.B profile
entry for a particular realm, then these ports are also listened on.
.IP secondary_ports
This relation lists the secondary ports (e.g. ports to serve Kerberos version
4 requests) to listen on.  If supplied, this list serves as a base list of
ports to listen on.  If any other ports are named in the
.I [realms]
section explicitly; or are named by
.B v4kdc
relations specifying this host in the
.I krb5.conf
file specified in the
.B profile
entry for a particular realm, then these ports are also listened on.
Further, if this list is specified and the first element is
.I \-1
then no secondary ports are listened to, even if specified in the
.I [realms]
section.
.SH REALMS SECTION
Each tag in the
.I [realms]
section of the file names a Kerbveros realm.  The value of the tag is a
subsection where the relations in that subsection define KDC parameters for
that particular realm.
.PP
For each realm, the following tags may be specified in the
.I [realms]
subsection:
.IP database_name
This
.B string
specifies the location of the Kerberos database for this realm.

.IP master_key_name
This
.B string
specifies the name of the master key.

.IP master_key_type
This
.B key type string
represents the master key's key type.

.IP encryption_type
This
.B encryption type string
represents the encryption type used for this realm.

.IP key_stash_file
This
.B string
specifies the location where the master key has been stored with
.I kdb5_stash.

.IP port
This
.B integer
specifies the primary port that the KDC is to listen to for this
realm.

.IP secondary_port
This
.B integer
specifies the secondary port that the KDC is to listen to for this
realm.

.IP max_life
This
.B delta time string
specifes the maximum time period that a ticket may be valid for in
this realm.  

.IP max_renewable_life
This
.B delta time string
specifies the maximum time period that a ticket may be renewed for in
this realm. 

.IP default_principal_expiration
This
.B absolute time string
specifies the default expiration date of principals created in this realm.

.IP default_principal_flags
This
.B flag string
specifies the default attributes of principals created in this realm.

.IP supported_keytypes
This list of
.B key
:
.B salt
strings specifies the default key/salt combinations of principals for this
realm.

.SH FILES 
/usr/local/lib/krb5kdc/kdc.conf

.SH SEE ALSO
krb5.conf(5), krb5kdc(8)