Re: port scans

[Michael Boman <michael.boman () gmail com>]

On Mon, 27 Dec 2004 06:38:33 -0800 (PST), Sidharth Deshpande
<sade_in () yahoo com> wrote:
> Hello team, 
>   
> I am running snort on a test network. I was interested to know if snort can
> detect port scans that are extremely slow. Port scans that span over a few
> days for example. 
>   
> Is there a way for snort to identify this kind of scan? 
>   
> I hope you could help me out with this information. 
>   
> Thanks 
>   
> Sidharth Deshpande

For extremly slow portscans an IDS like SHADOW is more suited.
However, you can do something like Frank Knobbe described at
http://msgs.securepoint.com/cgi-bin/get/snort-0404/325/1.html, ie:
alerting on non-existing hosts/ports.

Best regards
 Michael Boman


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