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Re: [Snort-users] Snort 2.6.1.3 ignoring stream4

from [Adam Keeton] Network Security [Permanent Link]
Subject: Re: [Snort-users] Snort 2.6.1.3 ignoring stream4
Date: Thu, 05 Apr 2007 17:08:21 -0400 
Hi Paul,

stream4 uses 8192 as a minimum for the max sessions. There should be a
warning printed at startup.

Try switching your decoder to ac-bnfa to address the packet loss issue.

Adam

Paul Melson wrote:

After upgrading from 2.6.0 to 2.6.1.3 Snort is using a much greater
amount of CPU and memory.  After looking at perfmonitor output, it
seems to be maxing out at ~ 8K sessions pretty much 24/7 despite the
following in snort.conf:

preprocessor stream4: disable_evasion_alerts, server_inspect_limit
300, memcap 209715200, max_sessions 2048

It seems to be ignoring max_sessions and memcap both.  Any body else
run across this issue?  It's causing the sensor to peak at around 20%
packet loss during high traffic periods.

Thanks,
PaulM

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Adam Keeton      Software Engineer
Snort Team       Sourcefire,Inc   
www.snort.org    www.sourcefire.com


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