Network information setting method, network system and communication device

摘要

Property information of a communication device is initialized in a second server when the communication device is connected to a control network to which a first server for storing key information and a second server for storing property information are connected. Key information necessary for security communication with respect to the second server is acquired from the first server and property information containing at least an identifier and network address of the communication device is transmitted to the second server via security communication using the key information.