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<H2><A NAME="SECTION00063000000000000000"></A><A NAME="On-access"></A>
<BR>
On-access Scanning
</H2>
There is a special thread in <code>clamd</code> that performs on-access
scanning under Linux and shares internal virus database
with the daemon. <SPAN CLASS="textbf">You must follow some important rules when
using it:</SPAN>
<UL>
<LI>Always stop the daemon cleanly - using the SHUTDOWN command or
the
<BR>
SIGTERM signal. In other case you can lose access
to protected files until the system is restarted.
</LI>
<LI>Never protect the directory your mail-scanner software
uses for attachment unpacking. Access to all infected
files will be automatically blocked and the scanner (including
<code>clamd</code>!) will not be able to detect any viruses. In the
result <SPAN CLASS="textbf">all infected mails may be delivered.</SPAN>
</LI>
</UL>
For example, to protect the whole system add the following lines to
<code>clamd.conf</code>:
<PRE>
ScanOnAccess yes
OnAccessIncludePath /
OnAccessExcludePath /proc
OnAccessExcludePath /temporary/dir/of/your/mail/scanning/software
</PRE>
For more configuration options, type 'man clamd.conf' or reference the
example clamd.conf.
<P>
<BR><HR>
<ADDRESS>
Cisco 2015-03-02
</ADDRESS>
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