Stopping portscanning

[Max Lopez <mlopez () itesm mx>]

Hi:

I am using Snort to detect Kazaa and Gnutella trafic, and to send a TCP Reset 
to both IPs when the Snort detects the traffic, we have been able to lower 
the traffic in our "Internet 2" serial (E3-34mbps) from 10-12mbps to 1-2 
mbps.

Now I am seeing a lot of portscans, so I am looking for some way to stop that 
portscanning, I am not sure if there is some way to send TCP_RESETs or 
HOST_UNREACHABLE icmp's.. do you have any way of stopping those scans??

Thanks a lot.

-- 

Max Lopez
Departamento de Redes Corporativo
ITESM Sistema
Tel. (81) 8358-2000  ext. 4136
Fax. (81) 8328-4208
Monterrey Mexico.


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