Re: Multiple Snort instances processing Pcap files

[Josh Bitto <jbitto () onlineschool ca>]

Just a thought and I could be totally wrong here. Would it be single threading on the cpu that could be the issue?



From: Shawn Lee [mailto:dashawn () gmail com]
Sent: Wednesday, May 29, 2013 1:40 PM
To: Parker, Jonathan E.
Cc: snort-users () lists sourceforge net
Subject: Re: [Snort-users] Multiple Snort instances processing Pcap files

What version of snort? Is there a number or processes in parallel that it starts failing at? What is your snort config?

On Wed, May 29, 2013 at 10:53 AM, Parker, Jonathan E. <jep () g-c-i net<mailto:jep () g-c-i net>> wrote:
I've developed a script (CentOS) to process .pcap files as they arrive in a directory.  It starts an instance of Snort 
to process the file (snort -y -r <pcap file> -c snort.conf -l <a unique directory for the given .pcap>).  I'm having 
occasional issues when multiple instances of Snort are running at the same time, the processing terminates for some 
files with the message "Error during Snort processing".  If I process the file w/o other instances of Snort running, it 
works fine.  It seems to get worse (more failures) the more instances of Snort I have running at once.

Any ideas on what might be causing this issue?

Thanks - Jon

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