I use a Printer that is enrolled in HP's 'Instant Ink' service. The printer (normally) connects to HP's servers to report its status, ink levels, etc. Starting somewhen in the last few weeks, however, this has not happened, with the printer reporting that it is unable to connect to the HP service. Connecting from the HP website also fails, although it can detect when the printer is online. HP say that everything is up and running at their end. The only way I can get the printer to connect is to use a mobile hotspot or an alternative HH3, so I guess the problem *must* be with my HH3 router. I have restarted and factory-reset the router, temporarily put the printer's IP address into the DMZ and disabled the HH3 firewall (the computer firewall is, obviously, irrelevant in this situation). Software version is V100R001C01B031SP09_L_B
Any suggestions as to any HH3 settings I can change to allow the Instant Ink service to connect?