snort-users May 2009 archive
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snort-users: Re: [Snort-users] Certin ET rulesets and 100 percen

Re: [Snort-users] Certin ET rulesets and 100 percent usage.

From: Matt Jonkman <jonkman_at_nospam>
Date: Thu May 07 2009 - 16:15:50 GMT
To: jlay@slave-tothe-box.net


Straight IP matching is something Snort doesn't do well. Unfortunately. So this isn't that unexpected.

I'd only run those rulesets where you can afford the cycles. or run a second snort for these alone and turn off everything in it's config to streamline some.

Matt

jlay@slave-tothe-box.net wrote:
> So here's something interesting. Enabling ANY of the below rulesets
> results in snort using 100% CPU:
>
> emerging-botcc.rules
> emerging-compromised.rules
> emerging-drop.rules
> emerging-dshield.rules
> emerging-rbn.rules
> emerging-tor.rules
>
> Without snort uses around 49%. Using 2.8.4.1 with about 700K average
> traffic. Any thoughts? Thanks.
>
> James
>
>
>
>
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