METHOD FOR COMMUNICATING USER ALREADY CONNECTED TO VIRTUAL PRIVATE NETWORK WITH COMMUNICATION DEVICE NOT BELONGING TO THE VIRTUAL PRIVATE NETWORK, AND CORRESPONDING NETWORK ACCESS SERVER

摘要

PROBLEM TO BE SOLVED: To provide a method in which NAS can access a communication device and a plurality of VPNs via a data communication network, and a user registered in the NAS can communicate with at least the one communication device not belonging to a host VPN, by a method which is transmittable to the end user as the end user does not require to care in a mechanism for identifying a plurality of IP addresses, and does not excessively impose a load on the NAS.;SOLUTION: A network access server enables accessing a communication device and a plurality of virtual private networks via a data communication network. A method is to transmit a message belonging to a communication between a user and the communication device via a logic channel between the network access server and the communication device. At this point, the logic channel refers to an identifier of the virtual private network.;COPYRIGHT: (C)2002,JPO