Patent ID: 6934763
Filing Date: 2005-08-23
Classification: H04L

Abstract:
1. A relay system relaying between two or more networks to which one or more communication devices are connected, comprising: two or more interface units accessing said networks; a domain definition table defining domains as a system framework including one or more networks; an inter domain connection definition table defining connectability between two or more domains; a routing module storing a routing destination of communication data; an address translation module for translating, when forwarding communication data from a first domain to a second domain, a first address belonging to the first domain contained in a source address field of the communication data into a second address being an address of the relay system as recognized in the second domain; an address reverse translation module for translating, when receiving communication data having the second address in a destination address field, the second address into the first address belonging to the first domain; and an inter domain connection judging module controlling connectability for routing between the two or more domains in accordance with definitions of said inter domain connection definition table.