Re: Event Suppression between specific Source and Destination

[Guido Hungerbuehler <guh () open ch>]

Hi Joel

Thanks for your feedback. But unfortunately this doesn't work in my 
opinion.

Assume I have Host A and Host B and I want to suppress a signature if 
and only if traffic goes from Host A to Host B.

If I create two suppress rules e.g.
Suppress if originating from A
and
Suppress if destination is B

Then the signature is also suppressed for any other destination than B 
for a packet originating in A. And it is also suppressed for any other 
source than A for a packet with destination B.



On 12/14/2012 04:20 PM, Joel Esler wrote:
> On Fri, Dec 14, 2012 at 11:04:23AM +0100, Guido Hungerbuehler wrote:
> > Hi
> >
> > I am running snort with alert-before-log configuration (it is
> > necessary). How can I suppress a signature between two specific hosts?
> >
> > With the 'Event Suppression' configuration it is only possible to select
> > either track by_src or track by_dst.
> >
> > The next question is: Why is this even like this for 'Event Suppression'?
> >
> > I already searched the mailing-list archive because I think this issue
> > has to be discussed earlier but I didn't find any information.
> >
> >
> > Thanks for your help.
>
>
> If you suppress it in one direction, then you won't see the alert.  If you bi directional traffic that you want to 
> suppress, you need to create two suppressions
>
> --
> Joel Esler
> Senior Research Engineer, VRT
> OpenSource Community Manager
> Sourcefire

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