Hi qiulang Only thing I somewhere read about netcat is:
If you want transfer file between machines you type
reciever# nc -l p 8000 > /home/user/destination
sender# nc reciever 8000 < /home/user/source
But if somebody else start to send packets to reciever:8000 they will be ignored (cause it is TCP comunucation and session has been established previous)
Maybe it will help you
---------- Post updated at 11:37 AM ---------- Previous update was at 11:27 AM ----------
also found tool called netcat++
socat