Just another DuckDNS set up problem

So I had a version of HA set up last year and then my SD card died. I did not have a full back up (I know rookie mistake) and I have just started trying to getting it all set up again. I’m having some problems getting DuckDNS addon set up and I think it has to deal with all the port forwarding but I’m not 100% sure. I’ve tried to follow juanmtech’s set up as best as I can.

Here’s what I currently have:

AT&T gateway router model 5268AC
port 443 -> 443
port 3218 -> 3218

Now I have the wireless access to my AT&T router turned off and have everything coming through my Nighthawk X6 R8000
port 443 -> 8123
port 3218 -> 3218

Any ideas what is going wrong? Am I missing something simple?

Thanks in advance for any help.

Unsure if it’s a typo you have, but I have:

3218 -> 3218
443 -> 8123

Yours shows 3128?

Yeah, sorry that was a typo

bump it up

does anyone have any suggestions?