COMMUNICATION DEVICE, CONTROLLER, COMMUNICATION METHOD, AND PROGRAM

• Main Authors: NISHIHARA HIDEOMI, HONMA SHUNSUKE, TSUCHIYA HIDEO, TACHIBANA YUZO, SUZUKI HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 16.08.2018
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

PROBLEM TO BE SOLVED: To rapidly identify, out of a plurality of terminals being supported by a communication device and having address-conversion functions, which terminal device is infected by a virus.SOLUTION: A communication device of a second network in a communication system with an edge router operable to connect a first network and the second network comprises: storage means for storing an address conversion table; address conversion means for converting an address of a packet received from a terminal in the second network into an address used in the first network based on the address conversion table, and sending the packet subjected to conversion to the edge router; number-of-terminals-notifying means for receiving a query for the number of terminals supported by the communication device from a controller, and notifying the controller of the terminal number; and conversion means for receiving addresses for the terminal number, given by the edge router based on an instruction from the controller, and converting the address conversion table using the addresses.SELECTED DRAWING: Figure 5 【課題】アドレス変換機能が備えられる通信装置の配下にある複数の端末のうちのどの端末がウィルスに感染しているかを迅速に特定する。【解決手段】第１の網と第２の網とを接続するエッジルータを備える通信システムにおける第２の網の通信装置において、アドレス変換テーブルを格納する記憶手段と、前記アドレス変換テーブルに基づいて、第２の網における端末から受信したパケットのアドレスを、第１の網において使用されるアドレスに変換し、当該変換を行ったパケットを前記エッジルータに送信するアドレス変換手段と、制御装置から、前記通信装置の配下の端末数の問い合わせを受信し、当該端末数を前記制御装置に通知する端末数通知手段と、前記制御装置からの指示に基づき前記エッジルータから払い出された前記端末数分のアドレスを受信し、当該アドレスを用いて前記アドレス変換テーブルを変換する変換手段とを備える。【選択図】図５