Why do you have to open ports? What are you trying to fulfill? Can you provide the topology?

D7 can be configured as a wireless router like C7 indeed. After upgrade the line, you may test if D7 works with your Sky fibre modem. Hope you can feed back the result here. :) You haven't purchased...

Sorry but I'm confused...:confused: TD-W8968 has two SSIDs? A host one and a guest one? When configuring a repeater, you cannot select the one you want to boost Wi-Fi signal?

W8970 is working as a modem router or router only? Internet IP address obtained on its web interface is public, right? Can you access the camera locally and how? Which port did you open for it?

Fully understand...:) But no worries and follow the guide to upgrade. If it is still failed unfortunately, it is still under warranty. :)

Download the new utility here and have a try. It works for PA4010KIT as well. No worries. :) http://www.tp-link.com/en/download/TL-PA8010P-KIT_V1.html#Utility