$ sudo nmap 213.49.129.5 -P0
Starting Nmap 4.20 ( http://insecure.org ) at 2007-10-23 16:59 CEST
Interesting ports on ip-213-49-129-5.dsl-static.scarlet.be (213.49.129.5):
Not shown: 1684 filtered ports
PORT STATE SERVICE
23/tcp closed telnet
80/tcp open http
81/tcp open hosts2-ns
110/tcp open pop3
443/tcp open https
1080/tcp open socks
1723/tcp open pptp
2301/tcp open compaqdiag
3128/tcp open squid-http
3389/tcp open ms-term-serv
6588/tcp open analogx
8000/tcp open http-alt
8081/tcp open blackice-icecap