[Snort-users] Snort CPU usage

Josh Bitto jbitto at ...16055...
Tue Feb 19 11:22:28 EST 2013

Ok let me throw a wrench at that....I'll be using proxmox to create virtual machines thus virtual nics.....Will that matter?

From: Mike Miller [mailto:mike at ...16027...]
Sent: Monday, February 18, 2013 5:01 PM
To: Josh Bitto
Cc: snort-users at lists.sourceforge.net
Subject: Re: [Snort-users] Snort CPU usage

I believe they solved the problem by dodging it. Rather than multi-threading snort, they use PF_RING to get access closer to the hardware, and does so in a way that multiple threads running the same config will get access to separate packets (I'm still coming up to speed on it).

There are also PF_RING aware NICS that greatly improve processing....and I believe Suricata is multi-threaded, but I haven't used it yet, myself.

On Feb 18, 2013, at 3:39 PM, Josh Bitto <jbitto at ...16055...<mailto:jbitto at ...843.....16055...>> wrote:

I'm bumping this back up.....I'm curious to hear. Is snort still only single threaded on a CPU or have newer versions allowed it to run on more than one core?

I'm wanting to make sure I have enough machine to run my WAN and about 4 VLANs

Each would have an interface to monitor, but where I'm stuck is the rule sets...

I read online where a great determining calculation is this...
1 CPU = (1000 signatures ) * (500 megabits network traffic)

So my question would be....if each interface has its own rule set aside from the main download of rules. Does that factor in?

From: Josh Bitto [mailto:jbitto at ...16055...<http://onlineschool.ca>]
Sent: Monday, February 18, 2013 8:29 AM
To: snort-users at lists.sourceforge.net<mailto:snort-users at ...3783...net>
Subject: [Snort-users] Snort CPU usage

Does anyone have a url or program where I can calculate hardware requirements for running snort on my network?

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