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<H2><A NAME="SECTION00043000000000000000"></A><A NAME="clamuko"></A>
<BR>
Clamuko
</H2>
Clamuko is a special thread in <SPAN CLASS="textit">clamd</SPAN> that performs on-access
scanning under Linux and FreeBSD. It is implemented as a thread in clamd
and cannot work as a clamd client because of the Dazuko implementation.
There are however some benefits of the current implementation - clamuko
is sharing the internal virus database with clamd and it's updated with
the RELOAD command. <SPAN CLASS="textbf">You must follow some important rules when
using clamuko:</SPAN>
<UL>
<LI>Always stop the daemon cleanly - using the QUIT command or
the SIGTERM signal. In other case you can lose your access
to protected files until the system is restarted.
</LI>
<LI>Never protect a directory your mail-scanner software
uses for attachment unpacking. Access to all infected
files will be automatically blocked and the scanner (even clamd)
won't be able to detect a virus. <SPAN CLASS="textbf">All infected mails will
be delivered.</SPAN>
</LI>
</UL>
You need to enable clamuko in <SPAN CLASS="textit">clamav.conf</SPAN>. To protect the /home
directory enable:
<PRE>
ClamukoIncludePath /home
</PRE>
To protect the whole system:
<PRE>
ClamukoIncludePath /
ClamukoExcludePath /proc
ClamukoExcludePath /temporary/dir/of/your/mail/scanning/software
</PRE>
You can use clamuko to protect files on Samba/Netatalk (but far
more better and safe idea is to use the <SPAN CLASS="textbf">samba-vscan</SPAN> module
<A HREF="node45.html#samba-vscan">5.17</A>. NFS is not supported (Dazuko doesn't intercept NFS
access calls). Yet another idea - you may build a database that contains
signatures for popular exploits and setup clamd to protect your server
from script-kiddies.
<P>
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<ADDRESS>
Tomasz Kojm
2004-07-22
</ADDRESS>
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