Interconnecting device, address conversion controlling method and computer program thereof

An address conversion controlling method for use in an interconnecting device that interconnects communication between a first communication device and a second communication device, said method comprising:

• converting a source address of a packet received from said first communication device from a first address, that is an address of said first communication device, to a second address, that is an address managed by said interconnecting device;
• storing said first address and said second address in such a manner that said first address and said second address are registered to correspond to each other;
• determining whether or not a session between said first communication device and said second communication device has finished by transmitting a check packet, for confirming a communication status between said first communication device and said second communication device, to at least one of said first communication device and said second communication device;
• and
• deleting the corresponding registration of said first address and said second address, in a case where it was determined that said session between said first communication device and said second communication device had finished, to release said second address.

A program, stored in a computer readable medium, for use with an interconnecting device that interconnects communication between a first communication device and a second communication device, said program comprising:

• a converting module operable to instruct said interconnecting device to convert a source address of a packet received from said first communication device from a first address, that is an address of said first communication device, to a second address, that is an address managed by said interconnecting device;
• a storing module operable to instruct said interconnecting device to store said first address and said second address in such a manner that said first address and said second address are registered to correspond to each other;
• a processing module operable to instruct said interconnecting device to determine whether or not a session between said first communication device and said second communication device has finished by transmitting a check packet, for confirming a communication status between said first communication device and said second communication device, to at least one of said first communication device and said second communication device;
• and
• a release module operable to instruct said interconnecting device to delete the corresponding registration of said first address and said second address in said interconnecting device, in a case where it was determined that said session between said first communication device and said second communication device had finished, to release said second address.