Snort mailing list archives

Re: Help with content rules looking for the absence of a hex pattern (large ICMP modification)


From: Matt Kettler <mkettler () evi-inc com>
Date: Thu, 20 Feb 2003 14:33:51 -0500

No, not yet... running vanilla 1.9.0 right now.

At 10:51 AM 2/20/2003 -0800, Erick Mechler wrote:
:: Is there a typo or logic bug in my rule that isn't obvious?
::
:: icmp.rules:alert icmp $EXTERNAL_NET any -> $HOME_NET any (msg:"ICMP Large
:: ICMP Packet"; dsize: >800; content:!"|000000000000000000000000|"; depth:40;
:: reference:arachnids,246; classtype:bad-unknown; sid:1000499; rev:3;)

No, there doesn't appear to be anything wrong with your signature.  Just
wondering, did you try using a version of snort out of CVS to see if it
fixes your problem?

Cheers - Erick



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