@lawrence_Baker, glad to hear you’re up and running, but please note there is likely a more secure solution than placing the Core in the DMZ. I recommend you alternatively try disabling IPv6 on the BT Hub, as this solution has been fruitful for users with the similar BT Smarthub in our solutions section here: BT Smart Hub 2: IPv6 Will Prevent Port Forwarding [Ticket in. Workaround - Disable IPv6] - #42 by DaveN