Re: BPF problem

[James Lay <jlay () slave-tothe-box net>]

On 2014-07-11 11:55, Mike Patterson wrote:
> On Jul 11, 2014, at 1:49 PM, waldo kitty <wkitty42 () windstream net> 
> wrote:
>
> > On 7/11/2014 1:34 PM, Mike Patterson wrote:
> > > Following up to myself: I’ve tried various permutations of my BPF 
> > > filter to
> > > no avail. I tried Snort versions 2.9.5.3 (which is what’s on my old 
> > > sensor),
> > > 2.9.6.0, and 2.9.6.1. Always, Snort says it’s reading my BPF 
> > > filter, and
> > > always, it’s including alerts for IPs and networks that are in the 
> > > filter.
> > >
> > > My current filter is of the form:
> > >
> > > not (net 1.2.3.4/8 or not net 10.0.0.0/24 or not 172.16.12.1)
> >
> > this may not be related to your problem but i can't help seeing the 
> > double
> > negatives in the above... are you wanting to include or exclude 
> > traffic to/from
> > 10.0.0.0/24 and 172.16.12.1?
> >
> > if you want to exclude traffic from them, perhaps you mean to use
> >
> > not (net 1.2.3.4/8 or net 10.0.0.0/24 or 172.16.12.1)
>
> That’s actually what I’m using, I just can’t transcribe properly.
>
> Mike
>
>
>
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Give:

not (net 1.2.3.4/8 or net 10.0.0.0/16 or 172.16.12.1)

a go

James

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