how to further diagnose 'ICMP Destination Unreachable' problem?

["Chris W. Parker" <cparker () swatgear com>]

Hello,

I have a lot of 'ICMP Destination Unreachable Port Unreachable' alerts
(36%) and I'm wondering what I should do to diagnose and correct the
problem.

I don't know much about networking so I wasn't able to glean much
insight from the Snort website
(http://www.snort.org/pub-bin/sigs.cgi?sid=402).

Any suggestions?


Thanks,
Chris.


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