The solution to copying service port mapping is. Restart the system. When mapping ports on internal routers of LAN, open service port numbers cannot be duplicated. It is recommended that you change the service to another port for testing when building it.

Introduction to port technology

With the development of computer network technology, the original physical interfaces such as keyboard, mouse, network card and graphics card can no longer meet the requirements of network communication. As the standard protocol of network communication, TCPIP protocol solves this communication problem.

TCPiP protocol is integrated into the kernel of the operating system, which is equivalent to introducing a new input-output interface technology into the operating system.

Before configuring port mapping, we must first determine several parameters, such as intranet address, intranet IP address that we need to map, such as NAS IP address, web service, intranet port, and services that need to be mapped, such as port 5000 of Qunhui NAS.

80-port web service, etc. Protocol, usually tcp protocol, default. For external network addresses, simply select the WAN port. By default, external network ports and external network ports to be mapped cannot use these web ports, such as 80, 8080, 143.