<li>Sesstion start - The command(s) specified in the <a href="config.html#session-start">session-start</a> configuration file are executed on the Freeside machine. The contents of the file are treated as a double-quoted perl string, with the following variables available: <code>$ip</code>, <code>$nasip</code> and <code>$nasfqdn</code>, which are the IP address of the starting session, and the IP address and fully-qualified domain name of the NAS this session is on.
<li>Session end - The command(s) specified in the <a href="config.html#session-stop">session-stop</a> configuration file are executed on the Freeside machine. The contents of the file are treated as a double-quoted perl string, with the following variables available: <code>$ip</code>, <code>$nasip</code> and <code>$nasfqdn</code>, which are the IP address of the starting session, and the IP address and fully-qualified domain name of the NAS this session is on.
</ul>
+<h2>Dropping expired users</h2>
+Run <pre>bin/freeside-session-kill username</pre> periodically from cron.
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