Snort mailing list archives

Re: rules vs. suppress


From: Jeremy Hewlett <jh () sourcefire com>
Date: Wed, 23 Mar 2005 16:51:47 -0500

On Mon, Mar 21, Lee Clemens wrote:

But my question is this: Would it have been better to simply write SUPPRESS
rules and specify my network in track by_src and track by_dst, or to keep
these many rules that include every private network except my own.

By adding these 21 rules, you're increasing the inspection time. Each
packet that comes in will be evaluated sequentially against these
rules. Suppression is a better choice, it's a simpler execution path,
and you're not adding any additional rules.




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