Blocking WMF Files via Squid

["Gaddis, Jeremy L." <jeremy () linuxwiz net>]

In response to the new 0-day WMF exploit, the educational institution 
for which I work recently took two steps to mitigate a possible infection.

The first step was filtering files with the ".wmf" extension at the 
e-mail gateway via McAfee's Groupshield.  The other step was to block 
URLs ending in ".wmf" through Squid, the caching proxy server (through 
which all of our HTTP traffic is transparently proxied).

I have detailed the few steps that were needed to do this at 
http://www.jeremygaddis.com/2005/12/29/blocking-wmf-at-the-perimeter/
in the event that it might be useful for others looking to do the same.

Please feel free to comment or provide feedback that may be of benefit.

Thanks,
-j

--
Jeremy L. Gaddis, GCWN, Linux+, Network+
http://www.jeremygaddis.com/

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