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kdc.conf - Kerberos V5 KDC configuration file
kdc.conf specifies per-realm configuration data to be used by the Kerberos V5 Authentica-
tion Service and Key Distribution Center (AS/KDC). This includes database, key and per-
The kdc.conf file uses the same format as the krb5.conf file. For a basic description of
the syntax, please refer to the krb5.conf description.
The following sections are currently used in the kdc.conf file:
Contains parameters which control the overall behaviour of the KDC.
Contains subsections keyed by Kerberos realm names which describe per-realm KDC
The following relations are defined in the [kdcdefaults] section:
This relation lists the ports which the Kerberos server should listen on, by
default. This list is a comma separated list of integers. If this relation is not
specified, the compiled-in default is usually port 88 and port 750.
This string specifies how the KDC should respond to Kerberos IV packets. If this
relation is not specified, the compiled-in default of nopreauth is used.
Each tag in the [realms] section of the file names a Kerberos realm. The value of the tag
is a subsection where the relations in that subsection define KDC parameters for that par-
For each realm, the following tags may be specified in the [realms] subsection:
This string specifies the location of the Kerberos database for this realm.
This string specifies the name of the master key.
This key type string represents the master key's key type.
This encryption type string represents the encryption type used for this realm.
This string specifies the location where the master key has been stored with
This string specifies the list of ports that the KDC is to listen to for this
realm. By default, the value of kdc_ports as specified in the [kdcdefaults] sec-
tion is used.
This delta time string specifes the maximum time period that a ticket may be valid
for in this realm.
This delta time string specifies the maximum time period that a ticket may be
renewed for in this realm.
This absolute time string specifies the default expiration date of principals cre-
ated in this realm.
This flag string specifies the default attributes of principals created in this
This list of key : salt strings specifies the default key/salt combinations of
principals for this realm.
This boolean string specifies whether or not the KDC should reject cross-realm TGS
requests if the request's list of transited realms names realms which would not be
included in the transit path if the path were to be computed using the KDC's
krb5.conf file, or if the client requests that the KDC not perform such a check.
The default is for this option to be enabled.
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