Service impossible attack defense system, service impossible attack defense method and service impossible attack defense program

摘要

It is provided in LAN2, through ISP net 4 to one which is connected to LAN2 communication device 3 at least the monitor it is provided inside 5 which watches the packet which was transmitted and ISP net 4, it has with the limiter 6 which, restricts the packet which faces to LAN2 as for monitor 5, it inspects the attack by the packet for communication equipment 3 it transmits information requirement defense demand for the defense for the attack which is inspected is displayed to limiter 6, limiter 6 through ISP net 4, on the basis of the information requirement defense restricts the packet which is transmitted to communication equipment 3.