| 摘要 |
<p>A system and method are provided for use in maintaining secure communications between a home network (12) and a mobile client (24) when the client roams outside of the home network to a new location. One method of the present invention includes the steps of: establishing a new IP address for the new client (24) location; sending a registration message identifying the new IP address location; authenticating the registration message; encapsulating and transmitting the registration message to the home server; registering the new IP address as a care-of-address for the client at the home sever; confirming the registration of the new IP address with the client (24); establishing a security association between the home server (14) and the relay server (22) on behalf of the client; performing network address translation between the client's permanent IP address client and the client's new IP address; tunneling packets addressed for the client (24) between the home server (14) and the relay server (22) based on the established security association and the address translation for the client (24); and decapsulating the packets at the relay server (22) and forwarding the packets to the client (24).</p> |
