| 摘要 |
A user's home is connected to a plurality of service providers by a plurality of VPNs, and traffic sent and received by a home terminal is filtered to an appropriate VPN so as to avoid communication disturbance due to IP address duplication by reducing unnecessary traffic. A terminal sends terminal information to inquire a management server about a SIP URI of VPN based on the terminal information sent by the terminal as well as user information. The management server notifies a router about the SIP URI of VPN corresponding to the notified information. The router establishes the VPN based on the notified SIP URI. The router maintains a mapping between the established VPN and a source terminal of a UPnP message, and then transfers traffic sent and received by each terminal after VPN establishment.
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