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KRB5KDC(8)                       MIT Kerberos                       KRB5KDC(8)

NAME
       krb5kdc - Kerberos V5 KDC

SYNOPSIS
       krb5kdc [-x db_args] [-d dbname] [-k keytype] [-M mkeyname] [-p
       portnum] [-m] [-r realm] [-n] [-w numworkers] [-P pid_file] [-T
       time_offset]

DESCRIPTION
       krb5kdc is the Kerberos version 5 Authentication Service and Key
       Distribution Center (AS/KDC).

OPTIONS
       The -r realm option specifies the realm for which the server should
       provide service.  This option may be specified multiple times to serve
       multiple realms.  If no -r option is given, the default realm (as
       specified in krb5.conf(5)) will be served.

       The -d dbname option specifies the name under which the principal
       database can be found.  This option does not apply to the LDAP
       database.

       The -k keytype option specifies the key type of the master key to be
       entered manually as a password when -m is given; the default is
       aes256-cts-hmac-sha1-96.

       The -M mkeyname option specifies the principal name for the master key
       in the database (usually K/M in the KDC's realm).

       The -m option specifies that the master database password should be
       fetched from the keyboard rather than from a stash file.

       The -n option specifies that the KDC does not put itself in the
       background and does not disassociate itself from the terminal.

       The -P pid_file option tells the KDC to write its PID into pid_file
       after it starts up.  This can be used to identify whether the KDC is
       still running and to allow init scripts to stop the correct process.

       The -p portnum option specifies the default UDP and TCP port numbers
       which the KDC should listen on for Kerberos version 5 requests, as a
       comma-separated list.  This value overrides the port numbers specified
       in the kdcdefaults section of kdc.conf(5), but may be overridden by
       realm-specific values.  If no value is given from any source, the
       default port is 88.

       The -w numworkers option tells the KDC to fork numworkers processes to
       listen to the KDC ports and process requests in parallel.  The top
       level KDC process (whose pid is recorded in the pid file if the -P
       option is also given) acts as a supervisor.  The supervisor will relay
       SIGHUP signals to the worker subprocesses, and will terminate the
       worker subprocess if the it is itself terminated or if any other worker
       process exits.

       The -x db_args option specifies database-specific arguments.  See
       Database Options in kadmin(1) for supported arguments.

       The -T offset option specifies a time offset, in seconds, which the KDC
       will operate under.  It is intended only for testing purposes.

EXAMPLE
       The KDC may service requests for multiple realms (maximum 32 realms).
       The realms are listed on the command line.  Per-realm options that can
       be specified on the command line pertain for each realm that follows it
       and are superseded by subsequent definitions of the same option.

       For example:

          krb5kdc -p 2001 -r REALM1 -p 2002 -r REALM2 -r REALM3

       specifies that the KDC listen on port 2001 for REALM1 and on port 2002
       for REALM2 and REALM3.  Additionally, per-realm parameters may be
       specified in the kdc.conf(5) file.  The location of this file may be
       specified by the KRB5_KDC_PROFILE environment variable.  Per-realm
       parameters specified in this file take precedence over options
       specified on the command line.  See the kdc.conf(5) description for
       further details.

ENVIRONMENT
       See kerberos(7) for a description of Kerberos environment variables.

SEE ALSO
       kdb5_util(8), kdc.conf(5), krb5.conf(5), kdb5_ldap_util(8), kerberos(7)

AUTHOR
       MIT

COPYRIGHT
       1985-2023, MIT

1.21.2                                                              KRB5KDC(8)