Insufficient responses for TCP sequencing (1), OS detection may be less accurate
Interesting ports on  (202.135.23.2):
(The 1540 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp                     
80/tcp     open        http                    

Remote OS guesses: AIX 4.1, AIX 4.2.X, AIX 4.3.2.0-4.3.3.0 on an IBM RS/*

# Nmap run completed at Fri Aug 17 14:42:36 2001 -- 1 IP address (1 host up) scanned in 61 seconds