Customers configure the NAT Server address mapping. When configure the server port to be 80、8000、8080，the server maybe interrupt
When configure the NAT Server, avoid using 80、8000、8080 port to map internal network server
The carriers of some areas interrupt some server on 80、8000 and 8080 port. Conclude the settled problem, we find that the rate of interruption is more high to the new added sever.
When configure the NAT Server address mapping, Some area of the carriers interrupt some server on 80、8000 and 8080 port.