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+.\" $Id: iprop.8 21940 2007-09-28 22:28:09Z lha $
+.\" 
+.\" Copyright (c) 2005 Kungliga Tekniska Högskolan
+.\" (Royal Institute of Technology, Stockholm, Sweden).
+.\" All rights reserved. 
+.\"
+.\" Redistribution and use in source and binary forms, with or without 
+.\" modification, are permitted provided that the following conditions 
+.\" are met: 
+.\"
+.\" 1. Redistributions of source code must retain the above copyright 
+.\"    notice, this list of conditions and the following disclaimer. 
+.\"
+.\" 2. Redistributions in binary form must reproduce the above copyright 
+.\"    notice, this list of conditions and the following disclaimer in the 
+.\"    documentation and/or other materials provided with the distribution. 
+.\"
+.\" 3. Neither the name of the Institute nor the names of its contributors 
+.\"    may be used to endorse or promote products derived from this software 
+.\"    without specific prior written permission. 
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+.\" SUCH DAMAGE. 
+.\"
+.Dd May 24, 2005
+.Dt IPROP 8
+.Os Heimdal
+.Sh NAME
+.Nm iprop ,
+.Nm ipropd-master ,
+.Nm ipropd-slave
+.Nd
+propagate changes to a Heimdal Kerberos master KDC to slave KDCs
+.Sh SYNOPSIS
+.Nm ipropd-master
+.Oo Fl c Ar string \*(Ba Xo
+.Fl -config-file= Ns Ar string
+.Xc
+.Oc
+.Oo Fl r Ar string \*(Ba Xo
+.Fl -realm= Ns Ar string
+.Xc
+.Oc
+.Oo Fl k Ar kspec \*(Ba Xo
+.Fl -keytab= Ns Ar kspec
+.Xc
+.Oc
+.Oo Fl d Ar file \*(Ba Xo
+.Fl -database= Ns Ar file
+.Xc
+.Oc
+.Op Fl -slave-stats-file= Ns Ar file
+.Op Fl -time-missing= Ns Ar time
+.Op Fl -time-gone= Ns Ar time
+.Op Fl -detach
+.Op Fl -version
+.Op Fl -help
+.Nm ipropd-slave
+.Oo Fl c Ar string \*(Ba Xo
+.Fl -config-file= Ns Ar string
+.Xc
+.Oc
+.Oo Fl r Ar string \*(Ba Xo
+.Fl -realm= Ns Ar string
+.Xc
+.Oc
+.Oo Fl k Ar kspec \*(Ba Xo
+.Fl -keytab= Ns Ar kspec
+.Xc
+.Oc
+.Op Fl -time-lost= Ns Ar time
+.Op Fl -detach
+.Op Fl -version
+.Op Fl -help
+.Ar master
+.Pp
+.Sh DESCRIPTION
+.Nm 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
+.Nm ipropd-slave .
+.Pp
+The slaves are specified by the contents of the
+.Pa slaves
+file in the KDC's database directory, e.g.\&
+.Pa /var/heimdal/slaves .
+This has principals one per-line of the form
+.Dl iprop/ Ns Ar slave Ns @ Ns Ar REALM
+where 
+.Ar slave 
+is the hostname of the slave server in the given 
+.Ar REALM ,
+e.g.\&
+.Dl iprop/kerberos-1.example.com@EXAMPLE.COM
+On a slave, the argument
+.Fa master
+specifies the hostname of the master server from which to receive updates.
+.Pp
+In contrast to
+.Xr hprop 8 ,
+which sends the whole database to the slaves regularly,
+.Nm
+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.
+.Pp
+The changes are propagated over a secure channel (on port 2121 by
+default).  This should normally be defined as
+.Dq iprop/tcp
+in
+.Pa /etc/services
+or another source of the services database.  The master and slaves
+must each have access to a keytab with keys for the
+.Nm iprop
+service principal on the local host.
+.Pp
+There is a keep-alive feature logged in the master's
+.Pa slave-stats
+file (e.g.\&
+.Pa /var/heimdal/slave-stats ) .
+.Pp
+Supported options for
+.Nm ipropd-master :
+.Bl -tag -width Ds
+.It Xo
+.Fl c Ar string ,
+.Fl -config-file= Ns Ar string
+.Xc
+.It Xo
+.Fl r Ar string ,
+.Fl -realm= Ns Ar string
+.Xc
+.It Xo
+.Fl k Ar kspec ,
+.Fl -keytab= Ns Ar kspec
+.Xc
+keytab to get authentication from
+.It Xo
+.Fl d Ar file ,
+.Fl -database= Ns Ar file
+.Xc
+Database (default per KDC)
+.It Xo
+.Fl -slave-stats-file= Ns Ar file
+.Xc
+file for slave status information
+.It Xo
+.Fl -time-missing= Ns Ar time
+.Xc
+time before slave is polled for presence (default 2 min)
+.It Xo
+.Fl -time-gone= Ns Ar time
+.Xc
+time of inactivity after which a slave is considered gone (default 5 min)
+.It Xo
+.Fl -detach
+.Xc
+detach from console
+.It Xo
+.Fl -version
+.Xc
+.It Xo
+.Fl -help
+.Xc
+.El
+.Pp
+Supported options for
+.Nm ipropd-slave :
+.Bl -tag -width Ds
+.It Xo
+.Fl c Ar string ,
+.Fl -config-file= Ns Ar string
+.Xc
+.It Xo
+.Fl r Ar string ,
+.Fl -realm= Ns Ar string
+.Xc
+.It Xo
+.Fl k Ar kspec ,
+.Fl -keytab= Ns Ar kspec
+.Xc
+keytab to get authentication from
+.It Xo
+.Fl -time-lost= Ns Ar time
+.Xc
+time before server is considered lost (default 5 min)
+.It Xo
+.Fl -detach
+.Xc
+detach from console
+.It Xo
+.Fl -version
+.Xc
+.It Xo
+.Fl -help
+.Xc
+.El
+Time arguments for the relevant options above may be specified in forms
+like 5 min, 300 s, or simply a number of seconds.
+.Sh FILES
+.Pa slaves ,
+.Pa slave-stats
+in the database directory.
+.Sh SEE ALSO
+.Xr hpropd 8 ,
+.Xr hprop 8 ,
+.Xr krb5.conf 8 , 
+.Xr kdc 8 ,
+.Xr iprop-log 8 .