Information security – Monitoring or scanning of software or data including attack... – Intrusion detection
Reexamination Certificate
2004-08-27
2009-06-23
Cervetti, David G (Department: 2436)
Information security
Monitoring or scanning of software or data including attack...
Intrusion detection
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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Hasei Shinji
Makino Tatsuya
Seki Yoshinaga
Uotani Miho
Cervetti David G
Foley & Lardner LLP
NEC Corporation
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