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  (200.217.231.28):
(The 1539 ports scanned but not shown below are in state: filtered)
Port       State       Service
21/tcp     open        ftp                     
53/tcp     open        domain                  
80/tcp     open        http                    

Remote OS guesses: NT Server 4.0 SP4-SP5 running Checkpoint Firewall-1, Windows NT4 / Win95 / Win98

# Nmap run completed at Sat Jun  2 08:54:14 2001 -- 1 IP address (1 host up) scanned in 616 seconds