INFORMATION ACQUISITION DEVICE, INFORMATION ACQUISITION METHOD, AND INFORMATION ACQUISITION PROGRAM

摘要

It is the problem that it cannot be judged whether a transmission source indicated by a transmission source address is an NAPT or a terminal device. An identifier acquired from a transmitted packet is associated with the transmission source address and stored in a predetermined storage part, and it is respectively judged whether the identifiers associated with respective transmission source addresses and stored increase evenly in the predetermined storage part. If it is not judged that the identifiers at a predetermined transmission source address increase evenly, the transmission source indicated by the predetermined transmission source address is detected as the address conversion transmitter.