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KRB5KDC(8)			 MIT Kerberos			    KRB5KDC(8)

       krb5kdc - Kerberos V5 KDC

       krb5kdc	[-x  db_args] [-d dbname] [-k keytype] [-M mkeyname] [-p port-
       num] [-m] [-r realm] [-n] [-w numworkers] [-P pid_file]	[-T  time_off-

       krb5kdc	is  the	Kerberos version 5 Authentication Service and Key Dis-
       tribution Center	(AS/KDC).

       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 spec-
       ified in	krb5.conf(5)) will be served.

       The -d dbname option specifies the name under which the principal data-
       base 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

       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	 back-
       ground and does not disassociate	itself from the	terminal.

       The -P pid_file option tells the	KDC to write its PID into pid_file af-
       ter 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 de-
       fault 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  op-
       tion  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 Data-
       base 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.

       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 spec-
       ified in	the kdc.conf(5)	file.  The location of this file may be	speci-
       fied by the KRB5_KDC_PROFILE environment	variable.   Per-realm  parame-
       ters  specified	in this	file take precedence over options specified on
       the command line.  See the kdc.conf(5) description for further details.

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

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


       1985-2020, MIT

1.20								    KRB5KDC(8)


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