Printing system, apparatus searching method and non-transitory recording medium storing apparatus searching program

A printing system includes a client terminal and information processing apparatus located in a first subnetwork, and a first image forming apparatus located in a second subnetwork. A hardware processor of the information processing apparatus registers address information of the first image forming apparatus, and when receiving a search packet from the client terminal, creates a forwarding packet including information that the search packet has been sent and the address information of the client terminal, on the basis of the search packet, to send the forwarding packet to the address information of the first image forming apparatus. A hardware processor of the first image forming apparatus receives the forwarding packet, extracts the information that the search packet has been sent and the address information of the client terminal from the forwarding packet, and sends a response to the search packet to the address information or the client terminal.