Patent ID: 8077711

Claim:
A gateway connected between first and second networks, comprising: a first interface to receive a packet from the first network, the packet including a destination address in a packet header; an address converter including: a memory to store address conversion information, and a controller to: receive the packet from the first interface, determine whether the packet includes a target destination address in an auxiliary header of the packet, convert the destination address using the conversion information in the memory when the packet does not include the target destination address, and replace the destination address with the target destination address, contained in the auxiliary header of the packet, when the packet includes the target destination address, where, when replacing the destination address, the controller is further to: discard the destination address, and move the target destination address to a location previously occupied by the discarded destination address; and a second interface to: receive the packet from the address converter, and output the packet to the second network.