Yes before I took off the hub 4 I took a photo of all the settings
The settings were the ones which Keith Beddoe guided me through several years ago when my hub 4 from BT replaced my virgin hub
After Keith’s advice everything worked perfectly until the changeover
yes it is set up for my DYNDNs
as the updater seems to have stopped updating and is not showing my DYNDNS host as a novice my thoughts are that the fault lies there
On my smart hub 2 I have a port forwarding rule allowing ports 37777-37778 to connect in and out.
Shows in port forwarding page as
Rule name/ mac address of device/external start 37777/external end 37778/ internal start 37777/internal end 37778/ protocol TCP.UDP.
Upnp all off in config page.
My CCTV works with this setup but will not if I delete the port forwarding.
Ports may vary depending on device but best test is to just turn firewall off for a short time and then try to access CCTV.
Hope you get it working.