| 摘要 |
PROBLEM TO BE SOLVED: To prevent communication connection of a terminal connected with a network while camouflaging the MAC address, while allowing unauthorized connection prevention efficiently, even for a terminal moving in the network.SOLUTION: An unauthorized connection prevention device includes means collecting a request packet for settling the MAC address from the IP address of a communication partner, transmitted on a network, and detecting duplication of the MAC address of a packet transmission source, means for transmitting a response packet, where the MAC address of the unauthorized connection prevention device is camouflaged as the MAC address of the communication partner, to the terminal of a transmission source of the request packet where duplication of the MAC address is detected, means for authenticating the terminal, upon receiving a connection request, where the IP address of the transmission source is camouflaged as the IP address of the communication partner, and the MAC address of the transmission source is camouflaged as the MAC address, from the terminal received the camouflaged response packet, and means for controlling to permit connection of the terminal passed the authentication with the communication partner.SELECTED DRAWING: Figure 4 |
