NETWORK MONITORING DEVICE, NETWORK MONITORING METHOD, NETWORK COMMUNICATING METHOD, AND NETWORK QUARANTINE SYSTEM

摘要

PROBLEM TO BE SOLVED: To solve at least one of the following problems that a hardware such as a dedicated switching hub having a function corresponding to a quarantine network to achieve the quarantine network, that the entire network is made a DHCP environment to introduce a dedicated DHCP server, that a dedicated personal firewall program has to be installed in all of devices forecast to be connected to a LAN, or the like. SOLUTION: A monitoring device is placed in an Ethernet broadcast domain, the monitoring device monitors an ARP (Address Resolution Protocol) request from a quarantine target device and returns an ARP response in accordance with the ARP request to thereby achieve a quarantine network that allows only communication with particular devices. COPYRIGHT: (C)2008,JPO&INPIT