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     iprop, ipropd-master, ipropd-slave - propagate changes to a Heimdal
     Kerberos master KDC to slave KDCs


     ipropd-master [-c string | --config-file=string] [-r string |
                   --realm=string] [-k kspec | --keytab=kspec] [-d file |
                   --database=file] [--slave-stats-file=file]
                   [--time-missing=time] [--time-gone=time] [--detach]
                   [--version] [--help]
     ipropd-slave [-c string | --config-file=string] [-r string |
                   --realm=string] [-k kspec | --keytab=kspec]
                   [--time-lost=time] [--detach] [--version] [--help] master


     ipropd-master is used to propagate changes to a Heimdal Kerberos database
     from the master Kerberos server on which it runs to slave Kerberos
     servers running ipropd-slave.

     The slaves are specified by the contents of the slaves file in the KDC’s
     database directory, e.g. /var/heimdal/slaves.  This has principals one
     per-line of the form
     where slave is the hostname of the slave server in the given REALM, e.g.
     On a slave, the argument master specifies the hostname of the master
     server from which to receive updates.

     In contrast to hprop(8), which sends the whole database to the slaves
     regularly, iprop normally sends only the changes as they happen on the
     master.  The master keeps track of all the changes by assigning a version
     number to every change to the database.  The slaves know which was the
     latest version they saw, and in this way it can be determined if they are
     in sync or not.  A log of all the changes is kept on the master.  When a
     slave is at an older version than the oldest one in the log, the whole
     database has to be sent.

     The changes are propagated over a secure channel (on port 2121 by
     default).  This should normally be defined as “iprop/tcp” in
     /etc/services or another source of the services database.  The master and
     slaves must each have access to a keytab with keys for the iprop service
     principal on the local host.

     There is a keep-alive feature logged in the master’s slave-stats file
     (e.g. /var/heimdal/slave-stats).

     Supported options for ipropd-master:

     -c string, --config-file=string

     -r string, --realm=string

     -k kspec, --keytab=kspec
             keytab to get authentication from

     -d file, --database=file
             Database (default per KDC)

             file for slave status information

             time before slave is polled for presence (default 2 min)

             time of inactivity after which a slave is considered gone
             (default 5 min)

             detach from console



     Supported options for ipropd-slave:

     -c string, --config-file=string

     -r string, --realm=string

     -k kspec, --keytab=kspec
             keytab to get authentication from

             time before server is considered lost (default 5 min)

             detach from console


     Time arguments for the relevant options above may be specified in forms
     like 5 min, 300 s, or simply a number of seconds.


     slaves, slave-stats in the database directory.


     krb5.conf(5), hprop(8), hpropd(8), iprop-log(8), kdc(8).