Patent ID: 6163843
Filing Date: 2000-12-19
Classification: H04L

Abstract:
A packet inspection device for inspecting packets transmitted from a computer located inside a network under own management toward another computer located outside said network, comprising:a judging unit configured to judge whether a passing of a packet transmitted from a mobile computer other than own management target computers to outside said network is permitted or not, according to a mobile computer identification information contained in said packet, and to send a message indicating a refusal of the passing of said packet to said mobile computer when the passing of said packet is judged to be not permitted;a transfer unit configured to transfer said packet when the judging unit judges that the passing of said packet is permitted;a key information returning unit configured to check whether a user information regarding a user of said mobile computer satisfies a prescribed condition or not, upon receiving a message requesting a key information for generating the mobile computer identification information from said mobile computer, and to return a requested key information to said mobile computer when the user information satisfies the prescribed condition; anda management target computer recognition unit configured to indicate the own management target computers managed by the packet inspection device;wherein the judging unit judges that a passing of one packet transmitted from one computer inside said network is permitted when the management target computer recognition unit indicates that said one packet is transmitted from one of the own management target computers.