The internal server function of the Eudemon 1000E provides NAT for servers on the intranet, which translates the private IP address of a server on the intranet to a public IP address for external users to access the server.

The server on the intranet is a PC for which a private IP address is set. After the internal server function is configured, the Eudemon 1000E maps a legitimate public IP address or a legitimate public IP address and a port for the PC. When external users access the legitimate IP address, the Eudemon 1000E sends the request to the server, enabling external users to access the server on the intranet.