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Network Security Snort-Users
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Re: [Snort-users] port scans

Subject: Re: [Snort-users] port scans
Date: Mon, 27 Dec 2004 23:23:48 +0800
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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