In this instance, the edge device was his HomeHub, and without the HomeHub ports open his SPF and NAT in the HomeHub would have denied all access to the NAS located on his LAN, irrespective of the ports on the NAS being open.
Mike, as I said, I don't have much to do with UPnP, Homehubs or that sort of trash.
The concept of UPnP doesn't even exist on the routers and firewalls I use at home .... let alone any that I might have come across elsewhere
