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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.
    <SPAN  CLASS="textbf">Quick test: run freshclam (as superuser) with no parameters
    and check the output.</SPAN> If everything is OK you may create the log file in
    /var/log (owned by <SPAN  CLASS="textit">clamav</SPAN> 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 <SPAN  CLASS="textit">should</SPAN> edit the configuration file <code>freshclam.conf</code>
    and point the <SPAN  CLASS="textit">UpdateLogFile</SPAN> 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 <SPAN  CLASS="textit">cron</SPAN> daemon. You have to add the
    following line to the crontab of <SPAN  CLASS="textbf">root</SPAN> or <SPAN  CLASS="textbf">clamav</SPAN> user:
    <SMALL CLASS="SMALL">    </SMALL><PRE>
N * * * *	/usr/local/bin/freshclam --quiet
</PRE>
    to check for a new database every hour. <SPAN  CLASS="textbf">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.</SPAN>
    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
2010-08-12
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