Snort mailing list archives

Re: Second Snort instance killing performance


From: Murali Raju <protocoljunkie () gmail com>
Date: Mon, 12 Sep 2005 13:20:33 -0400

Metasploit is good for testing sigs--> http://www.metasploit.com

_Raju

On 9/12/05, snort sara <snortster () gmail com> wrote:

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 () gmail com> 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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-- 
May the packets be with you.

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