Warning:  OS detection will be MUCH less reliable because we did not find at least 1 open and 1 closed TCP port
All 1542 scanned ports on  (210.51.22.4) are: filtered
Too many fingerprints match this host for me to give an accurate OS guess

# Nmap run completed at Sat Aug  4 10:55:44 2001 -- 1 IP address (1 host up) scanned in 337 seconds