SERVICE DISABLING ATTACK PROTECTING SYSTEM, SERVICE DISABLING ATTACK PROTECTING METHOD, AND SERVICE DISABLING ATTACK PROTECTING PROGRAM

摘要

Installed in a LAN (2), within the LAN (2) at least one communication device (3) monitoring device (5) for monitoring a packet transmitted through an ISP network (4) to the, ISP network (4) connected to the It is provided, and a restricting device (6) for limiting the packet directed to the LAN (2), monitoring device 5 is detected, and the defense of the detected attack the attack by the packet to the communication equipment (3) transmitting a defense request information indicating a request to the restrictor (6), and the restrictor (6), and through the ISP network (4) limits the packet to be transmitted to the communication device (3) on the basis of defense requirements information. ; Out of service attacks, packet limit, attack detection, defense needs, the secret communication