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HREF="node26.html">Clamdscan</A>
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<H2><A NAME="SECTION00063000000000000000"></A><A NAME="clamuko"></A>
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<H2><A NAME="SECTION00061000000000000000"></A><A NAME="clamd"></A>
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Clamuko is a special thread in <code>clamd</code> that performs on-access
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scanning under Linux and FreeBSD and shares internal virus database
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with the daemon. <SPAN CLASS="textbf">You must follow some important rules when
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<LI>Always stop the daemon cleanly - using the SHUTDOWN command or
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SIGTERM signal. In other case you can lose access
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to protected files until the system is restarted.
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<LI>Never protect the directory your mail-scanner software
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uses for attachment unpacking. Access to all infected
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files will be automatically blocked and the scanner (including
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<code>clamd</code>!) will not be able to detect any viruses. In the
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result <SPAN CLASS="textbf">all infected mails may be delivered.</SPAN>
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For example, to protect the whole system add the following lines to
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<code>clamd.conf</code>:
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ClamukoExcludePath /proc
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ClamukoExcludePath /temporary/dir/of/your/mail/scanning/software
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You can also use clamuko to protect files on Samba/Netatalk but a far
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more better and safe idea is to use the <SPAN CLASS="textbf">samba-vscan</SPAN> module.
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NFS is not supported because Dazuko doesn't intercept NFS access calls.
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<code>clamd</code> is a multi-threaded daemon that uses <SPAN CLASS="textit">libclamav</SPAN>
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to scan files for viruses. It may work in one or both modes listening on:
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<LI>Unix (local) socket
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The daemon is fully configurable via the <code>clamd.conf</code> file
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HREF="footnode.html#foot233"><SUP><SPAN CLASS="arabic">6</SPAN></SUP></A>. <code>clamd</code> recognizes the following commands:
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<LI><SPAN CLASS="textbf">PING</SPAN>
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Check the daemon's state (should reply with "PONG").
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<LI><SPAN CLASS="textbf">VERSION</SPAN>
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Print program and database versions.
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<LI><SPAN CLASS="textbf">RELOAD</SPAN>
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<LI><SPAN CLASS="textbf">SHUTDOWN</SPAN>
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<LI><SPAN CLASS="textbf">SCAN file/directory</SPAN>
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Scan file or directory (recursively) with archive support
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enabled (a full path is required).
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<LI><SPAN CLASS="textbf">RAWSCAN file/directory</SPAN>
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Scan file or directory (recursively) with archive and special file
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support disabled (a full path is required).
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<LI><SPAN CLASS="textbf">CONTSCAN file/directory</SPAN>
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Scan file or directory (recursively) with archive support
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enabled and don't stop the scanning when a virus is found.
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<LI><SPAN CLASS="textbf">MULTISCAN file/directory</SPAN>
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Scan file in a standard way or scan directory (recursively) using
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multiple threads (to make the scanning faster on SMP machines).
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<LI><SPAN CLASS="textbf">STREAM</SPAN>
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Scan stream: <code>clamd</code> will return a new port number you should
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connect to and send data to scan.
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<LI><SPAN CLASS="textbf">SESSION, END</SPAN>
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Start/end a <code>clamd</code> session - you can do multiple commands
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per TCP session (WARNING: due to the <code>clamd</code> implementation the
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<SPAN CLASS="textbf">RELOAD</SPAN> command will break the session).
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and reacts on the special signals:
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<LI><SPAN CLASS="textbf">SIGTERM</SPAN> - perform a clean exit
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<LI><SPAN CLASS="textbf">SIGHUP</SPAN> - reopen the log file
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<LI><SPAN CLASS="textbf">SIGUSR2</SPAN> - reload the database
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