... bubble to the address and port in the origin data (the relay). 5. The encapsulated bubble is received by the NAT and forwarded to the relay. The NAT now sees the relay as a recent peer and allows ... density enabledby the size of the host part of the addresses (the last 64 bits). In Teredo addresses, the network part of the address comes from the fixed Teredo prefix and the Teredo server ... work with. The significance to security of that shift will depend on the extent towhich the move happens, and the extent to which there is a security difference between symmetric and the new form....