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<H2><A NAME="SECTION00054000000000000000">
Setting up auto-updating</A>
</H2>
    <code>freshclam</code> is the default database updater for Clam AntiVirus.
    It can work in two modes:
    
<UL>
<LI>interactive - from command line, verbosely
</LI>
<LI>daemon - alone, silently
    
</LI>
</UL>
    When started by a superuser it drops privileges and switches
    to the <I>clamav</I> user. <code>freshclam</code> uses the
    <TT><A NAME="tex2html30"
  HREF="database.clamav.net">database.clamav.net</A></TT> round-robin DNS which automatically selects
    a database mirror<A HREF="node105.html#mirrors">9.1</A>. <code>freshclam</code> is an advanced tool:
    it supports database version verification 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 (<code>--user</code>):
    <PRE>
	# touch /var/log/clam-update.log
	# chmod 600 /var/log/clam-update.log
	# chown clamav /var/log/clam-update.log
</PRE>
    Now you <I>should</I> edit the configuration file (<code>freshclam.conf</code> or
    <code>clamd.conf</code> if they're merged) and configure the
    <I>UpdateLogFile</I> directive to point to the created log file.
    Finally, to run <code>freshclam</code> in the daemon mode, execute:
    <PRE>
	# freshclam -d
</PRE>
    The other method is to use the <I>cron</I> daemon. You have to add the
    following line to the crontab of the <B>root</B> or <B>clamav</B> users:
    <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 permissions on the config file when
    <code>HTTPProxyPassword</code> is enabled.
    <PRE>
	HTTPProxyServer myproxyserver.com
	HTTPProxyPort 1234
	HTTPProxyUsername myusername
	HTTPProxyPassword mypass
</PRE>

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<ADDRESS>
Tomasz Kojm
2004-10-17
</ADDRESS>
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