That is why the proposal is not so simply use a VPN, but to use a VPN and run BGP on top of that. The transfer of your network block to the VPN is handled by BGP. The internet address of the home VPN does not matter, you connect to a VPN server and present some ID (e.g. callsign and password) and the VPN server knows who you are. Those topics precisely are the improvements in the proposed system, over the existing IPIP system. Rob