Hi,

I have just switched network providers to a 4g/5g network provider in the UK (smarty, running on the three network) and i cannot connect to the tapo cameras using the app over the wan, but can from the lan.

Switching to my old network provider, they are fine on wan. 

I have temporarily dropped the firewall on my router, but it makes no difference and nor would I expect it to.

I have not captured detailed logs yet from the cameras but wanted to understand.

The tapo camera punches a route OUT over the wan to connect to the tp-link cloud server, correct?

And when I try to connect to the camera over the internet using the smartphone app, that app is also attempting to connect to the cloud server and not direct to my router, hence why generally with the cloud server it is not necessary to configure port forwarding for a route IN to the router (as this is only to consume cameras direct with 3rd party apps using rtsp/onvif).

What is the fqdn/url that the tapo cameras are trying to connect to and does the fact that my new network provider uses cgnat and therefore my wan IP keeps changing mean the tp link cloud server blocks it for some reason?

thanks