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 (HAN) and using a dynamic internet protocol (IP) address;
an external apparatus connectable to the gateway through a network; 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 about the gateway, and upon a request made by the external apparatus, provides the external apparatus with dynamic IP address information about the gateway, whereinif the gateway makes a request for connection, the external apparatus requests the DDNS server to provide IP address information about the gateway having requested the connection, receives the requested IP address information and permits or blocks the connection of the gateway depending on whether the received IP address information matches IP address information about the gateway having requested the connection.
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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.
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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 (HAN) and using a dynamic internet protocol (IP) address; an external apparatus connectable to the gateway through a network; 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 about the gateway, and upon a request made by the external apparatus, provides the external apparatus with dynamic IP address information about the gateway, wherein if the gateway makes a request for connection, the external apparatus requests the DDNS server to provide IP address information about the gateway having requested the connection, receives the requested IP address information and permits or blocks the connection of the gateway depending on whether the received IP address information matches IP address information about the gateway 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 and using a dynamic internet protocol (IP) address, an external apparatus connectable to the gateway through a network, 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 about the gateway, the control method comprising:
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at the gateway, requesting a connection to the external apparatus; at the external apparatus, accessing the DDNS server and requesting the DDNS server to provide IP address information about the gateway having requested the connection; at the DDNS server, in response to the request by the external apparatus, providing the external apparatus with IP address information about the gateway having requested the connection; at the external apparatus, receiving the requested IP address information about the gateway from the DDSN server; at the external apparatus, determining whether the received IP address information matches IP address information about the gateway having requested the connection; and at the external apparatus, permitting or blocking the connection of the gateway 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 and using a dynamic internet protocol (IP) address, an external apparatus connectable to the gateway through a network, 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 about the gateway, the control method comprising
if the gateway makes a request for connection to the external apparatus, at the external apparatus, requesting the DDNS server to provide IP address information about the gateway having requested the connection and receiving the requested IP address; -
at the external apparatus, determining whether the received IP address information matches IP address information that is directly received from the gateway having requested the connection; and permitting the connection of the gateway if a result of the determination is that the IP address information received from the DDNS server matches the IP address information directly received from the gateway, and blocking the connection of the gateway if 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 gateway.
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10. A control method for an external 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 a gateway device; requesting IP address information about the gateway device from a dynamic domain name system (DDNS) server, when the gateway 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 gateway device which requested the connection; and permitting the connection to the gateway device if the IP address information received from the DDNS server matches the IP address information directly received from the gateway device, and blocking the connection to the gateway device if the IP address information received from the DDNS server does not match.
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Specification