NAME

       iprop,  ipropd-master,  ipropd-slave — propagate transactions from a Heimdal Kerberos master KDC to slave
       KDCs

SYNOPSIS

       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

DESCRIPTION

       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
             iprop/slave@REALM
       where slave is the hostname of the slave server in the given REALM, e.g.
             iprop/kerberos-1.example.com@EXAMPLE.COM
       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 transaction 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 transactions 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  log  of  transactions  is also used to implement a two-phase commit (with roll-forward for recovery)
       method of updating the HDB.  Transactions are first recorded in the log, then in the HDB, then the log is
       updated to mark the transaction as committed.

       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)

       --slave-stats-file=file
               file for slave status information

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

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

       --detach
               detach from console

       --version

       --help

       Supported options for ipropd-slave:

       -c string, --config-file=string

       -r string, --realm=string

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

       --time-lost=time
               time before server is considered lost (default 5 min)

       --detach
               detach from console

       --version

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

FILES

       slaves,  slave-stats  in  the  database  directory.   ipropd-master.pid, ipropd-slave.pid in the database
       directory, or in the directory named by the HEIM_PIDFILE_DIR environment variable.

SEE ALSO

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

Debian                                            May 24, 2005                                          IPROP(8)