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. 17, 2005
Filed:
May. 04, 2001
Tadanao Ando, Yokohama, JP;
Atsuko Taguchi, Yokohama, JP;
Tatsuo Kondou, Yokohama, JP;
Hiroyuki Kida, Yokohama, JP;
Tadanao Ando, Yokohama, JP;
Atsuko Taguchi, Yokohama, JP;
Tatsuo Kondou, Yokohama, JP;
Hiroyuki Kida, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An IP communication network system has a plurality of autonomous systems, configuring IP networks of domains independent of each other, for performing interior- and exterior-forwarding of IP packets. The plurality of autonomous systems include a plurality of border relay devices positioned at borders between the IP networks. Each of the plurality of border relay devices includes a discarding unit for discarding, if the IP packet forwarded is an unauthorized intrusion packet, this unauthorized packet when detecting a re-intrusion on the basis of filtering information for detecting the re-intrusion of the unauthorized packet, and a distribution unit for distributing the filtering information to all other border relay devices within the same autonomous system.