NMAP

[Barry Brimer]

>                   can we stop scanning  from nmap command?
>
>                   anybody i can`t see our open ports or can`t scan from
> nmap command?
>
>                   can we stop nmap command from iptables?

You need something that will be reactive to a scan.  I haven't used it in 
ages, but you might try portsentry 
<http://sourceforge.net/projects/sentrytools>.  Besides that .. you need 
to have something reacts to receiving certain amounts of network traffic, 
and makes a blocking decision based on that.

Barry