Actually, enabling the myQNAPcloud service comes with a "Auto router configuration" which makes the NAS send uPNP requests to the router for opening inbound por

Actually, enabling the myQNAPcloud service comes with a "Auto router configuration" which makes the NAS send uPNP requests to the router for opening inbound ports. So unless uPNP is disabled on the router (which in most cases would have to be done manually at some point), you don't need to intentionally open a port for inbound access, the QNAP NAS will do it automatically...