Communication system, communication relay apparatus, and recording medium

A communication relay apparatus which is one communication relay apparatus among a plurality of communication relay apparatuses which relay communication between an external server provided outside a LAN and a plurality of devices provided inside the LAN, comprising:

• a search processor that performs a device search process of searching the LAN for a device;
• an acquisition processor that acquires information on at least one first management target device which is a device whose communication relay process with the external server is managed by a second communication relay apparatus which is a communication relay apparatus other than the one communication relay apparatus among the plurality of communication relay apparatuses provided inside the LAN;
• and
• a determination processor that determines at least one second management target device which is a device whose communication relay process with the external server is managed by a first communication relay apparatus which is the one communication relay apparatus among the plurality of communication relay apparatuses,
• wherein the determination processor determines the at least one second management target device after removing at least partial duplication of the at least one second management target device and the at least one first management target device, by excluding at least some of the at least one first management target device from two or more devices which are retrieved in the device search process, on the basis of the two or more devices and management device information which is the information on the at least one first management target device.

A non-transitory computer-readable recording medium for recording therein a program to be executed by a computer embedded in one communication relay apparatus among a plurality of communication relay apparatuses which relay communication between an external server provided outside a LAN and a plurality of devices provided inside the LAN, to cause the computer to perform:

• a) performing a device search process of searching the LAN for a device;
• b) acquiring information on at least one first management target device which is a device whose communication relay process with the external server is managed by a second communication relay apparatus which is a communication relay apparatus other than the one communication relay apparatus among the plurality of communication relay apparatuses provided inside the LAN;
• and
• c) determining at least one second management target device which is a device whose communication relay process with the external server is managed by a first communication relay apparatus which is the one communication relay apparatus among the plurality of communication relay apparatuses,
• wherein the at least one second management target device is determined in the step c) after removing at least partial duplication of the at least one second management target device and the at least one first management target device, by excluding at least some of the at least one first management target device from two or more devices which are retrieved in the device search process in the step a), on the basis of the two or more devices and management device information which is the information acquired in the step b).