NAME

       kpropd - Kerberos V5 replica KDC update server

SYNOPSIS

       kpropd  [-r  realm]  [-A  admin_server]  [-a  acl_file] [-f replica_dumpfile] [-F principal_database] [-p
       kdb5_util_prog] [-P port] [--pid-file=pid_file] [-D] [-d] [-s keytab_file]

DESCRIPTION

       The kpropd command runs on the replica KDC server.  It listens for update requests made by  the  kprop(8)
       program.   If  incremental  propagation is enabled, it periodically requests incremental updates from the
       primary KDC.

       When the replica receives a kprop request from the primary, kpropd accepts the dumped  KDC  database  and
       places  it  in  a  file,  and then runs kdb5_util(8) to load the dumped database into the active database
       which is used by krb5kdc(8).  This allows the primary Kerberos server to use kprop(8)  to  propagate  its
       database  to  the  replica  servers.   Upon  a  successful download of the KDC database file, the replica
       Kerberos server will have an up-to-date KDC database.

       Where incremental propagation is not used, kpropd is  commonly  invoked  out  of  inetd(8)  as  a  nowait
       service.  This is done by adding a line to the /etc/inetd.conf file which looks like this:

          kprop  stream  tcp  nowait  root  /usr/local/sbin/kpropd  kpropd

       kpropd  can also run as a standalone daemon, backgrounding itself and waiting for connections on port 754
       (or the port specified with the -P option  if  given).   Standalone  mode  is  required  for  incremental
       propagation.   Starting  in  release 1.11, kpropd automatically detects whether it was run from inetd and
       runs in standalone mode if it is not.  Prior to release 1.11, the -S option is required to run kpropd  in
       standalone mode; this option is now accepted for backward compatibility but does nothing.

       Incremental  propagation  may  be  enabled with the iprop_enable variable in kdc.conf(5).  If incremental
       propagation is enabled, the replica periodically polls the  primary  KDC  for  updates,  at  an  interval
       determined  by  the iprop_replica_poll variable.  If the replica receives updates, kpropd updates its log
       file with any updates from the primary.  kproplog(8) can be used to view a summary of  the  update  entry
       log    on    the    replica    KDC.     If    incremental   propagation   is   enabled,   the   principal
       kiprop/replicahostname@REALM (where replicahostname is the name of the replica KDC host, and REALM is the
       name of the Kerberos realm) must be present in the replica's keytab file.

       kproplog(8) can be used to force full replication when iprop is enabled.

OPTIONS

       -r realm
              Specifies the realm of the primary server.

       -A admin_server
              Specifies the server to be contacted for incremental updates; by default, the primary admin server
              is contacted.

       -f file
              Specifies the filename where the dumped principal database file is to be stored;  by  default  the
              dumped database file is /etc/krb5kdc/from_master.

       -F kerberos_db
              Path to the Kerberos database file, if not the default.

       -p     Allows  the user to specify the pathname to the kdb5_util(8) program; by default the pathname used
              is /usr/sbin/kdb5_util.

       -D     In this mode, kpropd will not detach itself from the  current  job  and  run  in  the  background.
              Instead, it will run in the foreground.

       -d     Turn  on debug mode.  kpropd will print out debugging messages during the database propogation and
              will run in the foreground (implies -D).

       -P     Allow for an alternate port number for kpropd to listen on.  This is only  useful  in  combination
              with the -S option.

       -a acl_file
              Allows  the  user  to  specify  the  path  to  the  kpropd.acl  file;  by default the path used is
              /etc/krb5kdc/kpropd.acl.

       --pid-file=pid_file
              In standalone mode, write the process ID of the daemon into pid_file.

       -s keytab_file
              Path to a keytab to use for acquiring acceptor credentials.

       -x db_args
              Database-specific arguments.  See Database Options in kadmin(1) for supported arguments.

FILES

       kpropd.acl
              Access file for kpropd; the default location is /usr/local/var/krb5kdc/kpropd.acl.  Each entry  is
              a  line  containing  the  principal  of  a  host  from which the local machine will allow Kerberos
              database propagation via kprop(8).

ENVIRONMENT

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

SEE ALSO

       kprop(8), kdb5_util(8), krb5kdc(8), kerberos(7), inetd(8)

AUTHOR

       MIT

COPYRIGHT

       1985-2022, MIT

1.20.1                                                                                                 KPROPD(8)