[ computing-lab ~ ]$ nmap -sS -v -O [url]www.byzj.cn[/url]

Starting Nmap 4.20 ( [url]http://insecure.org[/url] ) at 2008-05-10 17:08 CST
Initiating Parallel DNS resolution of 1 host. at 17:08
Completed Parallel DNS resolution of 1 host. at 17:08, 1.03s elapsed
Initiating SYN Stealth Scan at 17:08
Scanning 60.28.223.7 [1697 ports]
Discovered open port 80/tcp on 60.28.223.7
Discovered open port 3389/tcp on 60.28.223.7
Discovered open port 21/tcp on 60.28.223.7
SYN Stealth Scan Timing: About 22.07% done; ETC: 17:11 (0:01:46 remaining)
Completed SYN Stealth Scan at 17:10, 100.77s elapsed (1697 total ports)
Warning:  OS detection for 60.28.223.7 will be MUCH less reliable because we did not find at least 1 open and 1 closed TCP port
Initiating OS detection (try #1) against 60.28.223.7
Retrying OS detection (try #2) against 60.28.223.7
Initiating gen1 OS Detection against 60.28.223.7 at 106.744s
Warning:  OS detection will be MUCH less reliable because we did not find at least 1 open and 1 closed TCP port
For OSScan assuming port 21 is open, 30158 is closed, and neither are firewalled
For OSScan assuming port 21 is open, 39134 is closed, and neither are firewalled
For OSScan assuming port 21 is open, 37936 is closed, and neither are firewalled
Host 60.28.223.7 appears to be up ... good.
Interesting ports on 60.28.223.7:
Not shown: 1694 filtered ports
PORT     STATE SERVICE
21/tcp   open  ftp
80/tcp   open  http
3389/tcp open  ms-term-serv
No OS matches for host
TCP Sequence Prediction: Difficulty=0 (Trivial joke)
IPID Sequence Generation: Busy server or unknown class

OS detection performed. Please report any incorrect results at [url]http://insecure.org/nmap/submit/[/url] .
Nmap finished: 1 IP address (1 host up) scanned in 116.580 seconds
               Raw packets sent: 6906 (310.168KB) | Rcvd: 181 (13.666KB)
[ computing-lab ~ ]$