CONTROL DEVICE, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND PROGRAM

摘要

　Provided is a Twice NAT function that can be used even within a single network. A control device according to the present invention comprises: a mapping-information management unit for managing mapping information in which host location information, mapped IP addresses, actual IP addresses and host names have been associated; and an instruction generation unit for instructing a forwarding node on the forwarding path of a packet from the host to translate the mapped IP address and the actual address indicated in the transmission source IP address and the transmission destination IP address, respectively, to the corresponding actual address and mapped IP address on the basis of the mapping information.