An alternative use of DSTM concerns what has been called “the VPN scenario” [RMT02]. It concentrates on the situation where a DSTM node is outside its home domain. Supposing that the node can easily obtain an IPv6 address on the visited network but no IPv4 configuration is possible, the DSTM node can negotiate with its home DSTM server and TEP for IPv4 connectivity. If authentication succeeds and the nomad node obtains an address, the node’s IPv4 traffic will be sent to the TEP at its home network using an IPv4-in-IPv6 tunnel. Even if the path is not optimal, the node obtains access to private IPv4 resources in its home domain and may obtain global IPv4 connectivity.