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Network Security Snort-Signatures
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Re: [Snort-sigs] Possible improvements to pop3 rules.

from [pr00f] Network Security [Permanent Link]
Subject: Re: [Snort-sigs] Possible improvements to pop3 rules.
Date: Wed, 4 May 2005 16:01:20 -0500 (CDT) 
So this begs the question... What functionality does Snort provide for
timing individual rules or rule files to assist in locating slow rules?

On Wed, 4 May 2005, Frank Knobbe wrote:


On Wed, 2005-05-04 at 09:52 -0400, Jeff Kell wrote:

Heh... actually, I think I have to agree. The USER has to be at the
beginning on the line, but that doesn't have to be the beginning of the
_stream_.


OK, so then it's anchored by ^ or \r\n then, with a \s afterwards.


But that's in the pcre match. It still doesn't help speeding up the
content match to get an early-out.

Then again, there are probably worse rules that suck more processing
time than this one :)

Cheers,
Frank





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