krb5kdc man page on Archlinux

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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.

       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.  In normal
       operation, you should always allow the KDC to place itself in the back‐

       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 port numbers which the
       KDC should listen on for Kerberos version 5 requests, as a  comma-sepa‐
       rated list.  This value overrides the UDP port numbers specified in the
       kdcdefaults section of kdc.conf(5), but may be overridden by realm-spe‐
       cific  values.  If no value is given from any source, the default ports
       are 88 and 750.

       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.

       Note   On operating systems which do not have  pktinfo  support,	 using
	      worker  processes	 will  prevent	the KDC from listening for UDP
	      packets on network interfaces created after the KDC starts.

The -x db_args option specifies	 database-specific  arguments.	 Options  sup‐
ported for the LDAP database module are:

   -x nconns=<number_of_connections>
	  Specifies  the  number  of  connections  to  be  maintained per LDAP

   -x host=<ldapuri>
	  Specifies the LDAP server to connect to by URI.

   -x binddn=<binddn>
	  Specifies the DN of the object used by the KDC server to bind to the
	  LDAP	server.	  This object should have read and write privileges to
	  the realm container, the principal container, and the	 subtree  that
	  is referenced by the realm.

   -x bindpwd=<bind_password>
	  Specifies  the  password for the above mentioned binddn.  Using this
	  option may expose the password to other users on the system via  the
	  process  list;  to  avoid this, instead stash the password using the
	  stashsrvpw command of kdb5_ldap_util(8).

   -x debug=level
	  sets the OpenLDAP client library debug level.	 level is  an  integer
	  to be interpreted by the library.  Debugging messages are printed to
	  standard error, so this option must be used with the -n option to be
	  useful.  New in release 1.12.

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.

       krb5kdc uses the following environment variables:

       · KRB5_CONFIG


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


       1985-2013, MIT

1.12.1								    KRB5KDC(8)

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