Snort mailing list archives

Re: New Suppress


From: Jason Brvenik <jasonb () sourcefire com>
Date: Thu, 24 Sep 2009 23:43:07 -0400

On Thu, Sep 24, 2009 at 10:07 AM, Jack Pepper
<pepperjack () afferentsecurity com> wrote:
Quoting Jason Wallace <jason.r.wallace () gmail com>:

I would like to suppress all alerts from our external vulnerability
scanning service. Their scans can come from numerous IP ranges.


I use PASS rules for that.  The problem with suppress is that the test
packets pass through the rule base and get inspected, then get
ignored.  The PASS rule fires first and ends the analysis.

It doesn't work like that any more. All rule content is pre screened
against packets and then if it qualified gets to the pass / alert /
etc evaluation. In essence a PASS rule causes the system to do twice
the amount of work and should only really be used when you want to
PASS specific traffic and not just suppress the event from some place.


jp

--

Framework?  I don't need no stinking framework!

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