Network system and control method thereof
First Claim
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, whereinwhen 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.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a network system and a control method thereof, the network system including a gateway connected to a plurality of home appliances through a home area network, an outdoor apparatus connected to the gateway through a network, and a dynamic domain name system (DDNS) server to manage dynamic internet protocol (IP) address information about an apparatus using a dynamic IP address. A communication connection is achieved through a dynamic IP between a gateway inside the home and an apparatus outside the home in a smart grid network environment, so a user can easily access in-home services based on a dynamic IP. In addition, unauthorized traffic, which may be introduced into the home, is automatically blocked, so that the quality of the home network service is improved.
12 Citations
10 Claims
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1. A network system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control method in 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 and configured to manage dynamic IP address information of the external apparatus, the control method comprising:
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at the external apparatus, requesting a connection to the gateway; at the gateway, accessing the DDNS server and requesting the DDNS server to provide IP address information about the external apparatus having requested the connection; at the DDNS server, in response to the request by the gateway, providing the gateway with IP address information about the external apparatus having requested the connection; at the gateway, receiving the requested IP address information about the external apparatus from the DDSN server; at the gateway, determining whether the received IP address information matches IP address information about the external apparatus having requested the connection; and at the gateway, permitting or blocking the connection of the external apparatus based on a result of the determination. - View Dependent Claims (8)
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9. A control method in 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 and configured to manage dynamic IP address information of the external apparatus, the control method comprising:
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when the external apparatus makes a request for connection to the gateway, at the gateway, requesting the DDNS server to provide IP address information about the external apparatus having requested the connection and receiving the requested IP address; at the gateway, determining whether the received IP address information matches IP address information that is directly received from the external apparatus having requested the connection; and permitting the connection of the external apparatus when a result of the determination is that the IP address information received from the DDNS server matches IP address information directly received from the external apparatus, and blocking the connection of the external apparatus when a result of the determination is that the IP address information received from the DDNS server does not match the IP address information directly received from the external apparatus.
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10. A control method for a gateway device using a dynamic internet protocol (IP) address in a network system, the control method comprising:
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receiving a request for a connection from an external device; requesting IP address information about the external device from a dynamic domain name system (DDNS) server, when the external device requests the connection; receiving the requested IP address from the DDNS server; determining whether the received IP address information matches IP address information directly received from the external device which requested the connection; and permitting the connection to the external device when the IP address information received from the DDNS server matches the IP address information directly received from the external device, and blocking the connection to the external device when the IP address information received from the DDNS server does not match.
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Specification