PORT MAPPING DEVICE, ROUTER, PORT MAPPING METHOD, AND PORT MAPPING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a router that improves the convenience of port mapping.SOLUTION: A URL is for an external terminal connected with a WAN side of an external router to identify an application on an external server connected with an LAN side of the router. The URL comprises port mapping expansion means for having the router relay communication between the terminal and the server on the basis of information on a path included in a first URL not explicitly including a port number and information of a second URL for the router to identify the application.