[Snort-users] Second Snort instance killing performance

snort sara snortster at ...11827...
Mon Sep 12 08:14:48 EDT 2005

Hi all,

I need t show a demonstratoin of snort by showing some kinds of intrusuins 
that snort alerts on, do any one has a good testing tools to test snort?

any reply will be appreciated.

On 9/7/05, Paul Melson <pmelson at ...11827...> wrote:
> I've just run into an interesting situation with one of my Snort sensors.
> I've added another interface attached to a new span port to my existing
> sensor box and I want to run a second Snort process for that interface.
> Same binary, same logs, but different config file and rule set for each
> process. If either the original process monitoring eth1 or the new process
> monitoring eth2 are running, the load average is about 0.3-0.4. If both
> processes run simultaneously, load jumps to 2.0+ and performance suffers,
> packets drop, etc.
> The server is a Proliant G4 running RHEL4 with dual Xeon 3GHz CPUs, 2GB 
> RAM,
> Ultra320 disks, etc. so it shouldn't be choking on this relatively small
> amount of traffic. Snort version is Version 2.3.2 (Build 12).
> Anybody run into anything like this before? The problem seems to be
> specific to running two Snort processes, but I'm not sure where to
> troubleshoot next.
> PaulM
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