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Date:      Thu, 3 May 2001 16:28:29 +0200
From:      Gabriel Ambuehl <gabriel_ambuehl@buz.ch>
To:        freebsd-questions@FreeBSD.ORG
Subject:   Strange Server crash
Message-ID:  <0606058255.20010503162829@buz.ch>

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Hello freebsd-questions,
I've there had a very strange server crash last night. The machine did
respond to pings (sometimes at least) as well as to port scans but
nmap showed ports 22 and 80 as being filtered which is close to
impossible as ipfw is configured with default pass (and securelevel 2
so a cracker normally shouldn't be able to change this), connecting to
any port didn't work, though.

When I then went onsite to the colo and wanted to login using console,
the system was printing some error messages from time to time to the
console but login was impossible since there simply didn't appear ANY
character on screen which brought me to the idea that probably
something was chewing up all CPU resources... Is there any current DoS
attack with such a signature?



Best regards,
 Gabriel

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