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.

       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 des-cbc-crc.

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

       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-separated list.  This value overrides the UDP 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.

       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.  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

       krb5kdc uses the following environment variables:

       • KRB5_CONFIG

       • KRB5_KDC_PROFILE

SEE ALSO

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

AUTHOR

       MIT

COPYRIGHT

       1985-2017, MIT