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<H2><A NAME="SECTION00054000000000000000">
Setting up auto-updating</A>
</H2>
<code>freshclam</code> is the automatic database update tool for Clam AntiVirus.
It can work in two modes:
<UL>
<LI>interactive - on demand from command line
</LI>
<LI>daemon - silently in the background
</LI>
</UL>
<code>freshclam</code> is advanced tool: it supports scripted updates (instead
of transferring the whole CVD file at each update it only transfers the
differences between the latest and the current database via a special
script), database version checks through DNS, proxy servers (with
authentication), digital signatures and various error scenarios.
<B>Quick test: run freshclam (as superuser) with no parameters
and check the output.</B> If everything is OK you may create the log file in
/var/log (owned by <I>clamav</I> or another user <code>freshclam</code> will be
running as):
<PRE>
# touch /var/log/freshclam.log
# chmod 600 /var/log/freshclam.log
# chown clamav /var/log/freshclam.log
</PRE>
Now you <I>should</I> edit the configuration file <code>freshclam.conf</code>
and point the <I>UpdateLogFile</I> directive to the log file. Finally, to
run <code>freshclam</code> in the daemon mode, execute:
<PRE>
# freshclam -d
</PRE>
The other way is to use the <I>cron</I> daemon. You have to add the
following line to the crontab of <B>root</B> or <B>clamav</B> user:
<FONT SIZE="-1"> </FONT><PRE>
N * * * * /usr/local/bin/freshclam --quiet
</PRE>
to check for a new database every hour. <B>N should be a
number between 3 and 57 of your choice. Please don't choose any multiple
of 10, because there are already too many clients using those time slots.</B>
Proxy settings are only configurable via the configuration file and
<code>freshclam</code> will require strict permission settings for the config
file when <code>HTTPProxyPassword</code> is turned on.
<PRE>
HTTPProxyServer myproxyserver.com
HTTPProxyPort 1234
HTTPProxyUsername myusername
HTTPProxyPassword mypass
</PRE>
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<ADDRESS>
Tomasz Kojm
2007-07-11
</ADDRESS>
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