Patent ID: 8792507
Filing Date: 2014-07-29
Classification: H04L,Y02B,Y04S

Abstract:
1. A network system comprising: a gateway connected to a plurality of appliances through a home area network; an external apparatus connectable to the gateway through a network and using a dynamic internet protocol (IP) address; and a dynamic domain name system (DDNS) server connected to the external apparatus and the gateway through a network, configured to manage dynamic IP address information about the external apparatus, and upon a request made by the gateway, provides the gateway with dynamic IP address information about the external apparatus, wherein when the external apparatus makes a request for connection, the gateway requests the DDNS server to provide IP address information about the external apparatus having requested the connection, receives the requested IP address information and permits or blocks the connection of the external apparatus depending on whether the received IP address information matches IP address information about the external apparatus having requested the connection.