Communication relay device and communication relay method

A communication relay device that receives, from a correspondent communication relay device, a packet transmitted from a first communication device to a second communication device and that forwards the packet to the second communication device, the communication relay device comprising:

• a processor configured to obtain configuration information from the correspondent communication relay device and to generate correspondence information for converting source information and destination information of a packet transmitted from the first communication device to the second communication device according to the configuration information, wherein the correspondent communication relay device extracts, from a request packet that requests a connection to the second communication device from the first communication device, a first identifier for indicating the first communication device that is a source of the request packet and a second identifier for indicating the second communication device that is a destination of the request packet, and generates the configuration information including the first identifier and the second identifier;
• an identifier converter configured to convert the source information and the destination information of the packet transmitted from the first communication device to the second communication device respectively into the first identifier and the second identifier according to the correspondence information when the communication relay device receives the packet transmitted from the first communication device to the second communication device;
• and
• a communication processor configured to forward the packet for which the source information has been converted into the first identifier by the identifier converter to the second communication device according to the destination information which has been converted by the identifier converter into the second identifier.

A relay system that relays communication between a first communication device and a second communication device, the relay system comprising:

• a first relay device that is connected to the first communication device through a first network;
• and
• a second relay device that is connected to the second communication device through a second network, wherein
• the second relay device comprises:
• a processor configured to obtain port number information that indicates a port number used by the first communication device from a packet received from the first relay device and to extract a packet that includes a port number indicated by the port number information as a destination port number from among packets transmitted from the second communication device to the first communication device;
• an accelerator configured to perform an acceleration process for the packet extracted by the processor, the acceleration process accelerating communications on a third network provided between the first relay device and the second relay device;
• and
• a transmitter configured to transmit the packet for which the acceleration process has been performed by the accelerator to the first relay device, and wherein
• the first relay device performs an acceleration post-process corresponding to the acceleration process for the packet for which the acceleration process has been performed in the second relay device.