DOS IP with local port
From James Dooley's Wiki
Overview
Gets current netstat connections and shows each IP address with local port connection.
This script will not show correct IP addresses if this server is behind Zeus or a Firewall.
In those cases try View Domlogs for top visitors
Script
netstat -ntu | awk '{print $5 $4}' | cut -d: -f1,3 | sort | uniq -c | grep -v o | sort -n