Insufficient responses for TCP sequencing (2), OS detection may be less accurate
Interesting ports on  (203.21.47.50):
(The 1531 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp                     
22/tcp     open        ssh                     
23/tcp     open        telnet                  
25/tcp     open        smtp                    
70/tcp     open        gopher                  
80/tcp     open        http                    
98/tcp     open        linuxconf               
110/tcp    open        pop-3                   
111/tcp    open        sunrpc                  
143/tcp    open        imap2                   
514/tcp    open        shell                   

Remote operating system guess: Linux 2.1.122 - 2.2.16
Uptime 0.317 days (since Thu May 31 20:18:19 2001)

# Nmap run completed at Fri Jun  1 03:55:22 2001 -- 1 IP address (1 host up) scanned in 140 seconds