root@twozero:~# netstat -napt | grep 1812
root@twozero:~# nmap -p1812,1813 localhost

Starting Nmap 4.03 ( http://www.insecure.org/nmap/ ) at 2006-07-16 12:56 CEST
Interesting ports on localhost (127.0.0.1):
PORT     STATE  SERVICE
1812/tcp closed unknown
1813/tcp closed unknown

Nmap finished: 1 IP address (1 host up) scanned in 0.029 seconds
root@twozero:~#