Patent ID: 8639217

Claim:
A monitor apparatus of a wireless network connected to an access point of the wireless network via a network, said access point retaining packet transfer information including information of a correspondence between a port of said access point and an interface of said port, and information of a correspondence between an address of a transfer destination and the port, said monitor apparatus comprising: a managed terminal list having addresses of pre-registered end-user devices, said pre-registered end-user devices being targets of management, said pre-registered end-user devices being stored on the managed terminal list, as a subordinate to said access point when the authentication with said access point succeeds and said pre-registered end-user devices being stored on the managed terminal list as a subordinate to said access point when the authentication with said access point fails, where the access point and the end-user devices are separate and independent devices; a means configured to receive said packet transfer information from said access point, to detect a port bound to a wireless interface, said wireless interface being the port of the access point, from said packet transfer information, and to extract an address of a transfer destination corresponding to said detected port; an estimating means for estimating that a terminal corresponding to an address registered in said managed terminal list, said address coinciding with said extracted address, exists as a subordinate of the access point retaining said received packet transfer information, when the terminal succeeds in authentication with said access point; and an estimating means for estimating that a terminal corresponding to an address registered in said managed terminal list, said address coinciding with said extracted address, exists as a subordinate of the access point retaining said received packet transfer information, when the terminal fails in authentication with said access point.