CUPS instance that is meant as an AirPrint relay for printers that are already on the network but not AirPrint capable. CUPS supports printing to: AirPrint™ and IPP Everywhere™ printers, Network and local (USB) printers with Printer Applications, and Network and local (USB) printers with (legacy) PPD-based printer drivers. To add printers: visit the WebUI => Administration => Printers => Add Printer The default admin credential : admin/admin (please Change when setting up your container)