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Network Security Focus-IDS
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Re: HTTP traffic

from [abhicc285] Network Security [Permanent Link]
Subject: Re: HTTP traffic
Date: 18 Jul 2007 03:42:49 -0000 


When we write any rules for HTTP traffic will >there be any issue of false 
positive ?



Hi,

 HTTP rules are prone to false positive as well. For example, there is a 
vulnerability called as MS dos Device name vulnerability.  To prevent this 
vulnerability, MS Dos Device name like aux, com, lpt needs to be blocked. If 
your rule is blocking only com, the rule will end up blocking all the .com as 
well, triggering lot of false positives.

Hope it helps
Abhi

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