Network unauthorized access preventing system and network...

Information security – Monitoring or scanning of software or data including attack... – Intrusion detection

Reexamination Certificate

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Details

C726S004000

Reexamination Certificate

active

07552478

ABSTRACT:
There is disclosed a network unauthorized access preventing system in which in a network to which one or more information processing apparatuses and a network unauthorized access preventing apparatus are connected, an unauthorized apparatus which is not authorized to access the network is prevented from accessing the network. The system includes an information processing apparatus which sends a correct ARP response packet to the unauthorized apparatus in response to an ARP request broadcast from the unauthorized apparatus, and a network unauthorized access preventing apparatus which sends an ARP response packet containing a false MAC address as the MAC address of the information processing apparatus to the unauthorized apparatus immediately after the correct ARP response packet is sent to the unauthorized apparatus.

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