[root@tauceti:~]# nmap -T4 -P0 -O wanted.homeunix.org

Starting Nmap 4.01 ( http://www.insecure.org/nmap/ ) at 2006-02-22 13:17 CST
Warning:  OS detection will be MUCH less reliable because we did not find at least 1 open and 1 closed TCP port
Interesting ports on 12-202-155-120.client.insightBB.com (12.202.155.120):
(The 1668 ports scanned but not shown below are in state: filtered)
PORT     STATE  SERVICE
20/tcp   closed ftp-data
21/tcp   closed ftp
80/tcp   closed http
1024/tcp closed kdm
Device type: general purpose
Running: Linux 2.4.X|2.5.X|2.6.X
OS details: Linux 2.4.0 - 2.5.20, Linux 2.6.0 - 2.6.11

Nmap finished: 1 IP address (1 host up) scanned in 29.589 seconds