Re: Snort in a cluster

[Michael Stone <mstone+snort () mathom us>]

On Mon, Jul 12, 2004 at 09:52:14AM +0100, Alex Butcher, ISC/ISYS wrote:
> > Or you can adjust the pcap filter so snort sees less traffic.
>
> Out of interest, how do you divide up the traffic? TCP vs. UDP? ports 
> 0-32767 vs 32768-65535? Or some other way?

Anyway that makes sense for your environment. Some I divide by port,
some by ip range. It's enough on some systems just to do 80 and !80.

> > I've had good success running multiple snorts on one system where each
> > sees part of the traffic and together they can keep up with a faster link 
> > than a single process trying to watch everything.
>
> I won't deny your experience, but that doesn't make much sense! *shrug*

It doesn't make sense that dividing a traffic stream in half and giving
each half its own processor allows more traffic to be monitored than
trying to watch the same traffic with a single processor?

Mike Stone


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