Snort mailing list archives

Re: Homebrew unified2 processing vs barnyard2


From: Jason Haar <Jason.Haar () trimble co nz>
Date: Tue, 20 Jul 2010 14:48:25 +1200

 On 07/20/2010 07:14 AM, K D wrote:
True, I suppose I'm wondering if barnyard2's performance leaves much
to be desired in the snort community.

Aren't you dwelling on the wrong thing here? snort has to look at
truckloads of network traffic, and records to file the events it thinks
are interesting. i.e. the file is empty most of the time (people
alerting >1 per sec are out of scope for this discussion ;-). Then
barnyard monitors that file and creates SQL,syslog,etc events based on
what it finds.

Almost all the overhead/bottlenecks in a snort NIDS are on the
collection and presentation (eg base) ends. Barnyard overhead is a mere
blip in comparison.

What we are all seeing is that *SQL is a slow backend to use as a
frontend. Solving that is hard(ware) - or just move to Sourcefire's
commercial solution - which doesn't use SQL ;-)

-- 
Cheers

Jason Haar
Information Security Manager, Trimble Navigation Ltd.
Phone: +64 3 9635 377 Fax: +64 3 9635 417
PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1


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