Provided by: krb5-kdc_1.8.1+dfsg-5_i386 bug

NAME

       kdc.conf - Kerberos V5 KDC configuration file

DESCRIPTION

       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.

       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:

       [kdcdefaults]
              Contains  parameters  which control the overall behaviour of the
              KDC.

       [realms]
              Contains  subsections  keyed  by  Kerberos  realm  names   which
              describe per-realm KDC parameters.

KDCDEFAULTS SECTION

       The following relations are defined in the [kdcdefaults] section:

       kdc_ports
              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.

       v4_mode
              This string specifies how the KDC should respond to Kerberos  IV
              packets.  Valid  values  for  this  relation are the same as the
              valid arguments to the -4 flag to krb5kdc.  If this relation  is
              not specified, the compiled-in default of none is used.

REALMS SECTION

       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 particular realm.

       For  each  realm,  the  following tags may be specified in the [realms]
       subsection:

       acl_file
              This string specifies the location of the  access  control  list
              (acl)  file  that  kadmin uses to determine which principals are
              allowed which permissions on the database. The default value  is
              /etc/krb5kdc/kadm5.acl.

       admin_keytab
              This  string  Specifies  the  location  of  the keytab file that
              kadmin uses to authenticate to the database.  The default  value
              is /etc/krb5kdc/kadm5.keytab.

       database_name
              This  string specifies the location of the Kerberos database for
              this realm.

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

       default_principal_flags
              This  flag string specifies the default attributes of principals
              created in this realm.  The format for the string  is  a  comma-
              separated list of flags, with ’+’ before each flag to be enabled
              and ’-’ before each flag to be disabled.   The  default  is  for
              postdateable, forwardable, tgt-based, renewable, proxiable, dup-
              skey, allow-tickets, and service to be enabled, and  all  others
              to be disabled.

              There are a number of possible flags:

              postdateable
                     Enabling   this  flag  allows  the  principal  to  obtain
                     postdateable tickets.

              forwardable
                     Enabling  this  flag  allows  the  principal  to   obtain
                     forwardable tickets.

              tgt-based
                     Enabling  this  flag allows a principal to obtain tickets
                     based on a ticket-granting-ticket, rather than  repeating
                     the  authentication  process  that was used to obtain the
                     TGT.

              renewable
                     Enabling  this  flag  allows  the  principal  to   obtain
                     renewable tickets.

              proxiable
                     Enabling  this  flag allows the principal to obtain proxy
                     tickets.

              dup-skey
                     Enabling this flag  allows  the  principal  to  obtain  a
                     session  key  for  another  user, permitting user-to-user
                     authentication for this principal.

              allow-tickets
                     Enabling this flag means that the KDC will issue  tickets
                     for  this  principal.   Disabling  this  flag essentially
                     deactivates the principal within this realm.

              preauth
                     If this flag is enabled on a client principal, then  that
                     principal  is  required  to  preauthenticate  to  the KDC
                     before receiving any tickets.  On  a  service  principal,
                     enabling  this  flag  means that service tickets for this
                     principal will only be issued to clients with a TGT  that
                     has the preauthenticated ticket set.

              hwauth If  this  flag is enabled, then the principal is required
                     to  preauthenticate  using  a  hardware   device   before
                     receiving any tickets.

              pwchange
                     Enabling  this  flag  forces  a  password change for this
                     principal.

              service
                     Enabling this flag allows the the KDC  to  issue  service
                     tickets for this principal.

              pwservice
                     If  this  flag  is  enabled, it marks this principal as a
                     password change service.  This should  only  be  used  in
                     special  cases,  for  example,  if  a user’s password has
                     expired, the user has to get tickets for  that  principal
                     to  be able to change it without going through the normal
                     password authentication.

       dict_file
              This string location of the dictionary file  containing  strings
              that are not allowed as passwords.  If this tag is not set or if
              there is no policy assigned to the principal, then no check will
              be done.

       kadmind_port
              This  port number specifies the port on which the kadmind daemon
              is to listen for this realm.

       kpasswd_port
              This port number specifies the port on which the kadmind  daemon
              is to listen for this realm.

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

       kdc_ports
              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] section is used.

       master_key_name
              This string specifies the name of the principal associated  with
              the master key.  The default value is K/M.

       master_key_type
              This key type string represents the master key’s key type.

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

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

       iprop_enable
              This  boolean  ("true" or "false") specifies whether incremental
              database propagation is enabled.  The default is "false".

       iprop_master_ulogsize
              This numeric value specifies the maximum number of  log  entries
              to  be  retained for incremental propagation.  The maximum value
              is 2500; default is 1000.

       iprop_slave_poll
              This delta time string specfies how often the  slave  KDC  polls
              for  new updates from the master.  Default is "2m" (that is, two
              minutes).

       supported_enctypes
              list of key:salt strings that  specifies  the  default  key/salt
              combinations of principals for this realm

       reject_bad_transit
              this  boolean  specifies  whether  or  not the list of transited
              realms for cross-realm tickets should  be  checked  against  the
              transit  path  computed  from  the realm names and the [capaths]
              section of its krb5.conf file

FILES

       /etc/krb5kdc/kdc.conf

SEE ALSO

       krb5.conf(5), krb5kdc(8)

                                                                   KDC.CONF(5)