[Bro] Bro performance issues

William Jones jones at tacc.utexas.edu
Wed Nov 2 16:21:09 PDT 2011

Something changed in the way packet filters work on 2.0 Bata bro. It does not seem to have the old behavior.

What I wont is the ability to set a filter per work.   That way I could write I could spread the tcp load for ip and iptv6 acros n works and run a n+1 work that take care of the no ip traffic. 

Bill Jones

-----Original Message-----
From: bro-bounces at bro-ids.org [mailto:bro-bounces at bro-ids.org] On Behalf Of William Jones
Sent: Wednesday, November 02, 2011 4:32 PM
To: 'Seth Hall'
Cc: bro at bro-ids.org
Subject: Re: [Bro] Bro performance issues


-----Original Message-----
From: Seth Hall [mailto:seth at icir.org] 
Sent: Wednesday, November 02, 2011 2:58 PM
To: William Jones
Cc: 'Tomer Teller'; bro at bro-ids.org
Subject: Re: [Bro] Bro performance issues

On Nov 2, 2011, at 3:41 PM, William Jones wrote:

> Try the following pcap filtering trick:
> [worker-1]
> type=worker
> host=localhost
> interface=em0
> aux_scripts=q1of2

Nice one!  

In the 2.0-beta you don't even need to define that aux_scripts field either.  You should be able to just make files named worker-1.local.bro and worker-2.local.bro in your <prefix>/share/bro/site/ directory and they will automatically get loaded by the correct nodes.


Seth Hall
International Computer Science Institute
(Bro) because everyone has a network

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