| 摘要 |
A method, apparatus and system enable mobile nodes to determine their location and register with an appropriate home agent to provide seamless roaming between disparate networks. More specifically, according to one embodiment, a mobile node may include a policy engine, which may select one of a plurality of location modules. The mobile node may apply the selected location module to determine its location with respect to a corporate demilitarized zone ("DMZ"). If the mobile node determines that it is located on an intranet behind the corporate DMZ, it may register with an internal home agent on the intranet. If the mobile node determines that it is located on an external network, it may register with an external home agent on the external network and/or the corporate DMZ, establish a Virtual Private Network ("VPN") tunnel to the corporate DMZ, and register with the internal home agent via the tunnel.
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