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

       1985-2024, MIT

1.21.3                                                                                                KRB5KDC(8)