An information processing device comprises: a communication unit which communicates with each device on a network, determines whether to accept data received from a device on the network or not based on a prescribed criterion, and transfers the received data to the inside in response to the received data being determined to be accepted based on the criterion; a setting change unit which makes a setting change to the criterion of the communication unit according to instructions represented by setting request data in response to receipt of the setting request data requesting for the setting change of the criterion from a device on the network via the communication unit; and a judgment unit which judges whether the communication with the device as the sender of the setting request data can be performed normally via the communication unit or not in response to the setting change by the setting change unit according to the setting request data.