Re: Portscan preprocessor and false positives

[Alberto Gonzalez <ag-snort () cerebro violating us>]

im assuming from your e-mail this is spp_portscan not spp_portscan2

try
preprocessor portscan-ignorehosts: x.x.x.x

also.. Snort has a _manual_ not just a FAQ... remember that.. avaialbe 
via html or pdf...

hope it helps
  
   - Albert

Ben Keepper wrote:

> I didn't see this covered in the FAQ.
>
> We are receiving a lot of spp:portscan alerts when internal users go to
> sites like msn.com (go figure).  
>
> All the separate banner ads are showing up as separate IP and the
> portscan preprocessor fires.  I have tried increasing the threshholds to
> no avail.
>
> I could add HOME_NET to the ignore hosts variable, but would prefer to
> just have the preprocessor for sensor ignore what it thinks are port
> scans on port 80.
>
> So can I get the portscan preprocessor to ignore to ignore port 80?
>
> Thanks to everybody for your help.
>
> Ben
>
>
>
>
>
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