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
       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.  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

       1985-2015, MIT