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IP address duplication monitoring device, IP address duplication monitoring method and IP address duplication monitoring program
IP address duplication monitoring device, IP address duplication monitoring method and IP address duplication monitoring program
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机译：IP地址重复监视装置，IP地址重复监视方法以及IP地址重复监视程序
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摘要
An IP address duplication monitoring device that performs monitoring for IP address duplication of a device to be monitored that is connected through a router and a network, when a LAN is connected with a network outside the LAN through a router provided with an ARP cache in which a set comprising an IP address and a lower layer address which is an address of a lower layer than the IP layer is held for a fixed period, and a device to be monitored, which is a device that provides a service to the network, is present in a LAN, the IP address duplication monitoring device having: a service request issuing section that sends a plurality of service requests to the device to be monitored; a service response analysis section that receives service responses obtained as a result of the service requests; and a monitoring section that generates an instruction for a service request to said service request issuing section at prescribed time intervals, that compares said plurality of service responses obtained from said service response analysis section and that makes a decision as to the existence of IP address duplication based on the results of this comparison.
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