In a communication device a processor receives, from a terminal device, a plurality of input values corresponding to a plurality of setting items including an IP Address setting item, a Subnet Mask setting item, and a Gateway setting item. The plurality of input values includes a first input value, a second input value, and a third input value. The processor determines whether the third input value is within a range that is defined by the received first input value and the received second input value; and record the first input value for the Subnet Mask setting item, the second input value for the one of the IP address setting item and the Gateway setting item, and the third input value for the remaining one of the IP address setting item and the Gateway setting item when it is determined that the third input value is within the range.