IP device, management server, and network system

US20050152287A1Inactive Publication Date: 2005-07-14PANASONIC CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
PANASONIC CORP
Publication Date
2005-07-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

An IP device (for example, network cameras 3a, 3b, and 3c) connectable to a router (for example, a router 2) makes a request to the router for assignment of a port number when a predetermined operation is performed, and notifies a management server 6 connected to a wide area network of address data containing an assigned port number when the port number is assigned from the router, wherein address data containing the port number can be registered in the management server 6 on the wide area network, so that, even when access is made from the terminal 4 on the wide area network side with a port number that is locally updated, access is made possible by transmitting address data of the IP device to the terminal 4.
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Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to an IP device which can register access data in a management server by being connected to a router and assigned with a port number for port forwarding, a management server which registers this access data and provides address data of this IP device to a terminal that accesses via a wide area network, and a network system comprising these.

[0002] ADSL and CATV for constant connection to a wide area network such as the Internet have spread on a full scale, and broadband routers have widely spread. However, with the current IP protocol IPv4, the absolute number of global IP addresses is insufficient, so that the shortage of global IP addresses is covered by using the NAT (Network Address Translation) function and the port forwarding function (static IP masquerade). This NAT function converts a local IP address of a LAN-side device into a global IP address of the WAN side of a router when the LAN-side device accesses the...

Claims

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