The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2009
Filed:
Mar. 17, 2003
Hironori Goto, Kurume, JP;
Akihiro Nawata, Kasuga, JP;
Michihiro Muta, Fukuoka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention aims at providing a DDNS server, a DDNS client terminal and a DDNS system which maintains high security while using DHCP and allows an access to terminals having the same IP address as well as data updates. The DDNS server includes a terminal management table storing the domain name, global IP address and port number of a DDNS client terminal, characterized in that the terminal management section checks whether a same global IP address is present in the terminal management table when a request to overwrite a global IP address is made from a DDNS client terminal and, in case the same global IP address is absent, permits overwriting of the global IP address, and in case the same global IP address is present, checks the port number, and in case the same port number is detected, inhibits overwriting of the global IP address, and in case the port number is different, permits overwriting of the global IP address.