Re: BPF filter syntax

[Joel Esler <jesler () sourcefire com>]

I'd probably include the IP in question in the bpf for that particular port, that way you aren't ignoring ALL traffic 
on that port.  Just from your one host.

--
Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager
Sourcefire


On Thursday, February 28, 2013 at 7:48 PM, Eric G wrote:

> After lurking on this list for many moons and occasionally reply to some questions and threads I finally have my own 
> question to post.
> I have a particular sensor whose CPU keeps spiking out at 1am. I'm trying to write a BPF filter to filter out the 
> backup traffic, on tcp port 13724. Honestly it's not a big deal if the BPF filter matches on other traffic that 
> happens to use that port (as a source port for example), I'm really just trying to finally solve this problem first 
> and tune the filter later.
> Is !(port 13724) the correct syntax for the filter? Should I match on a NOT or match on the traffic I'm trying to 
> filter out?
> Thanks guys,
> Eric
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