Insufficient responses for TCP sequencing (3), OS detection may be less accurate
Interesting ports on icnet.PKU.EDU.CN (162.105.204.246):
(The 1533 ports scanned but not shown below are in state: closed)
Port       State       Service
25/tcp     open        smtp                    
80/tcp     open        http                    
111/tcp    filtered    sunrpc                  
135/tcp    open        loc-srv                 
139/tcp    open        netbios-ssn             
445/tcp    open        microsoft-ds            
515/tcp    open        printer                 
1025/tcp   open        listen                  
1026/tcp   open        nterm                   

Remote OS guesses: Windows NT 5 Beta2 or Beta3, Windows Me or Windows 2000 RC1 through final release, MS Windows2000 Professional RC1/W2K Advance Server Beta3, Windows Millenium Edition v4.90.3000

# Nmap run completed at Sat Jun  2 08:51:25 2001 -- 1 IP address (1 host up) scanned in 21 seconds