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<h1><a href="../../index.html">MIT Kerberos Documentation</a></h1>
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<div class="section" id="kpropd">
<span id="kpropd-8"></span><h1>kpropd<a class="headerlink" href="#kpropd" title="Permalink to this headline">¶</a></h1>
<div class="section" id="synopsis">
<h2>SYNOPSIS<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
<p><strong>kpropd</strong>
[<strong>-r</strong> <em>realm</em>]
[<strong>-a</strong> <em>acl_file</em>]
[<strong>-f</strong> <em>slave_dumpfile</em>]
[<strong>-F</strong> <em>principal_database</em>]
[<strong>-p</strong> <em>kdb5_util_prog</em>]
[<strong>-P</strong> <em>port</em>]
[<strong>-d</strong>]</p>
</div>
<div class="section" id="description">
<h2>DESCRIPTION<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
<p>The <em>kpropd</em> command runs on the slave KDC server. It listens for
update requests made by the <a class="reference internal" href="kprop.html#kprop-8"><em>kprop</em></a> program. If incremental
propagation is enabled, it periodically requests incremental updates
from the master KDC.</p>
<p>When the slave receives a kprop request from the master, kpropd
accepts the dumped KDC database and places it in a file, and then runs
<a class="reference internal" href="kdb5_util.html#kdb5-util-8"><em>kdb5_util</em></a> to load the dumped database into the active
database which is used by <a class="reference internal" href="krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a>. This allows the master
Kerberos server to use <a class="reference internal" href="kprop.html#kprop-8"><em>kprop</em></a> to propagate its database to
the slave servers. Upon a successful download of the KDC database
file, the slave Kerberos server will have an up-to-date KDC database.</p>
<p>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 <tt class="docutils literal"><span class="pre">/etc/inetd.conf</span></tt> file which looks like this:</p>
<blockquote>
<div><div class="highlight-python"><pre>kprop stream tcp nowait root /usr/local/sbin/kpropd kpropd</pre>
</div>
</div></blockquote>
<p>kpropd can also run as a standalone daemon, backgrounding itself and
waiting for connections on port 754 (or the port specified with the
<strong>-P</strong> 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 <strong>-S</strong> option is required to run
kpropd in standalone mode; this option is now accepted for backward
compatibility but does nothing.</p>
<p>Incremental propagation may be enabled with the <strong>iprop_enable</strong>
variable in <a class="reference internal" href="../conf_files/kdc_conf.html#kdc-conf-5"><em>kdc.conf</em></a>. If incremental propagation is
enabled, the slave periodically polls the master KDC for updates, at
an interval determined by the <strong>iprop_slave_poll</strong> variable. If the
slave receives updates, kpropd updates its log file with any updates
from the master. <a class="reference internal" href="kproplog.html#kproplog-8"><em>kproplog</em></a> can be used to view a summary of
the update entry log on the slave KDC. If incremental propagation is
enabled, the principal <tt class="docutils literal"><span class="pre">kiprop/slavehostname@REALM</span></tt> (where
<em>slavehostname</em> is the name of the slave KDC host, and <em>REALM</em> is the
name of the Kerberos realm) must be present in the slave’s keytab
file.</p>
<p><a class="reference internal" href="kproplog.html#kproplog-8"><em>kproplog</em></a> can be used to force full replication when iprop is
enabled.</p>
</div>
<div class="section" id="options">
<h2>OPTIONS<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
<dl class="docutils">
<dt><strong>-r</strong> <em>realm</em></dt>
<dd>Specifies the realm of the master server.</dd>
<dt><strong>-f</strong> <em>file</em></dt>
<dd>Specifies the filename where the dumped principal database file is
to be stored; by default the dumped database file is <a class="reference internal" href="../../mitK5defaults.html#paths"><em>LOCALSTATEDIR</em></a><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt><tt class="docutils literal"><span class="pre">/from_master</span></tt>.</dd>
<dt><strong>-p</strong></dt>
<dd>Allows the user to specify the pathname to the <a class="reference internal" href="kdb5_util.html#kdb5-util-8"><em>kdb5_util</em></a>
program; by default the pathname used is <a class="reference internal" href="../../mitK5defaults.html#paths"><em>SBINDIR</em></a><tt class="docutils literal"><span class="pre">/kdb5_util</span></tt>.</dd>
<dt><strong>-d</strong></dt>
<dd>Turn on debug mode. In this mode, kpropd will not detach
itself from the current job and run in the background. Instead,
it will run in the foreground and print out debugging messages
during the database propagation.</dd>
<dt><strong>-P</strong></dt>
<dd>Allow for an alternate port number for kpropd to listen on. This
is only useful in combination with the <strong>-S</strong> option.</dd>
<dt><strong>-a</strong> <em>acl_file</em></dt>
<dd>Allows the user to specify the path to the kpropd.acl file; by
default the path used is <a class="reference internal" href="../../mitK5defaults.html#paths"><em>LOCALSTATEDIR</em></a><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt><tt class="docutils literal"><span class="pre">/kpropd.acl</span></tt>.</dd>
</dl>
</div>
<div class="section" id="environment">
<h2>ENVIRONMENT<a class="headerlink" href="#environment" title="Permalink to this headline">¶</a></h2>
<p>kpropd uses the following environment variables:</p>
<ul class="simple">
<li><strong>KRB5_CONFIG</strong></li>
<li><strong>KRB5_KDC_PROFILE</strong></li>
</ul>
</div>
<div class="section" id="files">
<h2>FILES<a class="headerlink" href="#files" title="Permalink to this headline">¶</a></h2>
<dl class="docutils">
<dt>kpropd.acl</dt>
<dd>Access file for kpropd; the default location is
<tt class="docutils literal"><span class="pre">/usr/local/var/krb5kdc/kpropd.acl</span></tt>. Each entry is a line
containing the principal of a host from which the local machine
will allow Kerberos database propagation via <a class="reference internal" href="kprop.html#kprop-8"><em>kprop</em></a>.</dd>
</dl>
</div>
<div class="section" id="see-also">
<h2>SEE ALSO<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2>
<p><a class="reference internal" href="kprop.html#kprop-8"><em>kprop</em></a>, <a class="reference internal" href="kdb5_util.html#kdb5-util-8"><em>kdb5_util</em></a>, <a class="reference internal" href="krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a>, inetd(8)</p>
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<h2>On this page</h2>
<ul>
<li><a class="reference internal" href="#">kpropd</a><ul>
<li><a class="reference internal" href="#synopsis">SYNOPSIS</a></li>
<li><a class="reference internal" href="#description">DESCRIPTION</a></li>
<li><a class="reference internal" href="#options">OPTIONS</a></li>
<li><a class="reference internal" href="#environment">ENVIRONMENT</a></li>
<li><a class="reference internal" href="#files">FILES</a></li>
<li><a class="reference internal" href="#see-also">SEE ALSO</a></li>
</ul>
</li>
</ul>
<br/>
<h2>Table of contents</h2>
<ul class="current">
<li class="toctree-l1"><a class="reference internal" href="../../user/index.html">For users</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="../index.html">For administrators</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="../install.html">Installation guide</a></li>
<li class="toctree-l2"><a class="reference internal" href="../conf_files/index.html">Configuration Files</a></li>
<li class="toctree-l2"><a class="reference internal" href="../realm_config.html">Realm configuration decisions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../database.html">Database administration</a></li>
<li class="toctree-l2"><a class="reference internal" href="../lockout.html">Account lockout</a></li>
<li class="toctree-l2"><a class="reference internal" href="../conf_ldap.html">Configuring Kerberos with OpenLDAP back-end</a></li>
<li class="toctree-l2"><a class="reference internal" href="../appl_servers.html">Application servers</a></li>
<li class="toctree-l2"><a class="reference internal" href="../host_config.html">Host configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="../backup_host.html">Backups of secure hosts</a></li>
<li class="toctree-l2"><a class="reference internal" href="../pkinit.html">PKINIT configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="../otp.html">OTP Preauthentication</a></li>
<li class="toctree-l2"><a class="reference internal" href="../princ_dns.html">Principal names and DNS</a></li>
<li class="toctree-l2"><a class="reference internal" href="../enctypes.html">Encryption types</a></li>
<li class="toctree-l2 current"><a class="reference internal" href="index.html">Administration programs</a><ul class="current">
<li class="toctree-l3"><a class="reference internal" href="kadmin_local.html">kadmin</a></li>
<li class="toctree-l3"><a class="reference internal" href="kadmind.html">kadmind</a></li>
<li class="toctree-l3"><a class="reference internal" href="kdb5_util.html">kdb5_util</a></li>
<li class="toctree-l3"><a class="reference internal" href="kdb5_ldap_util.html">kdb5_ldap_util</a></li>
<li class="toctree-l3"><a class="reference internal" href="krb5kdc.html">krb5kdc</a></li>
<li class="toctree-l3"><a class="reference internal" href="kprop.html">kprop</a></li>
<li class="toctree-l3 current"><a class="current reference internal" href="">kpropd</a></li>
<li class="toctree-l3"><a class="reference internal" href="kproplog.html">kproplog</a></li>
<li class="toctree-l3"><a class="reference internal" href="ktutil.html">ktutil</a></li>
<li class="toctree-l3"><a class="reference internal" href="k5srvutil.html">k5srvutil</a></li>
<li class="toctree-l3"><a class="reference internal" href="sserver.html">sserver</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../../mitK5defaults.html">MIT Kerberos defaults</a></li>
<li class="toctree-l2"><a class="reference internal" href="../env_variables.html">Environment variables</a></li>
<li class="toctree-l2"><a class="reference internal" href="../troubleshoot.html">Troubleshooting</a></li>
<li class="toctree-l2"><a class="reference internal" href="../advanced/index.html">Advanced topics</a></li>
<li class="toctree-l2"><a class="reference internal" href="../various_envs.html">Various links</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../appdev/index.html">For application developers</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../plugindev/index.html">For plugin module developers</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../build/index.html">Building Kerberos V5</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../basic/index.html">Kerberos V5 concepts</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../mitK5features.html">MIT Kerberos features</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../build_this.html">How to build this documentation from the source</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../about.html">Contributing to the MIT Kerberos Documentation</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../resources.html">Resources</a></li>
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