http://community.9cbs.net/expert/faq/faq_index.asp?id=198978
The question raised by a 9CBS netizen, just asked me, so I used Sniffer Pro to intercept the packet analysis, basically understanding this problem.
PCAW transmission data and control only uses the TCP 5631 port, which is called Data Port, and the UDP 5632 port is a status port, which is used to declare (or transfer) the state of the PCAW. Including if there is SESSION, whether it is listening, whether it is blocked, and hostname and other information, the Status Port is reported to the remote control, and when connecting the remote server, first use the 5632 port to explore the road, if you do not open 5632 port, ICMP will The answer target port is not arrogant, but at this time, the 5631 port will still try and establish a connection (just like a stone crossing the river).
BTW: PCAW Remote Management Management is to find a PCAW machine that is waiting to be connected to all host 5632 ports, if you don't use standard 5632 ports, you will be able to hide the role of the PCAW host, this is also status Give it port.
