Patent ID: 6694437
Filing Date: 2004-02-17
Classification: H04L

Abstract:
A method for an Access Concentrator to provide on-demand services for Virtual Private Network (VPN) subscribers, comprising the steps of:performing a first PPP negotiation with a host machine of a dial-up user when receiving a connection request from said dial-up user; determining the authenticity of said dial-up user by looking up a VPN user database to check whether said dial-up user within said VPN user database; assigning a network address to said dial-up user when said dial-up user is determined to be authentic; performing a NCP negotiation to determine either said dial-up user demanding VPN services or non-VPN services; if said dial-up user demanding a non-VPN service, providing the non-VPN service to said dial-up user by reference to said network address; and if said dial-up user demanding a VPN-service, performing a second PPP negotiation with a VPN server and assigning a legal VPN network address for said dial-up user to access said VPN server.