Relay device for program denial of service attack defenses, denial-of-service attack defense system, denial of service attack protection device, relay device, and denial-of-service attack protection program

摘要

The gate device 8 based on the normal address information gate device 8 acquires the regular address information indicating the source of non-attack packets sent by (address issuing server 10) legitimate devices located on the network 2, the obtained packets to pass while allowing the passage of packets matching the conditions set forth in the regular condition information among the packets to generate a normal condition information indicating the condition of the non-attack packets, received from the network, making an attack to the communication equipment 7 be configured to restrict.