Some minor items to add:
What is connected to your netgear router on the WAN port? Is it a modem or another router?
If there's another router in front, you need to setup a DMZ on it and send all the traffic to the IP of your netgear.
I know this is old but I cannot access remotely, so I tried this and it works fine:
but when I navigate to https://my.channelsdvr.net I get this:
And though I can connect remotely and see the channel lineups, I cannot playback anything.
I'm having trouble setting up remote access on my new Mac. It worked fine on my PC, so I went back into my AT&T fiber router page kept all the same settings in the Firewall > NAT/Gaming tab (TCP:8089) but changed the "Needed by Device" line from my PC IP address to my Mac.
However, when I try to connect away from home, after clicking Authorize Access, I get this error message:
So I followed your instructions to check if port forwarding is working at check-host.net, and it shows that I'm "Connected" from everywhere. Then I ran Troubleshooting under the Support tab on the Server page, all boxes have green checkmarks, and Remote Access says "Successfully established external connection." But when I navigate to https://my.channelsdvr.net/ the menu bar along the top loads, but none of the tabs work, and the page just shows a spinning wheel.
Any ideas?
That error usually means your security/privacy settings on iOS aren't allowing network access to the Channels app
Hm, that's weird.
I haven't changed any settings on my phone, and Remote Access worked fine when the server was on my PC--I used it all the time.
Maybe some issue with 5G signal, or your cell service is blocking it somehow. Does it work on another device?
Okay, I asked my sister to check it from her house, and she said it plays fine on her firestick, so maybe it is my 5G or cell service blocking it. 
I have to house sitting for her next week though, so I guess we'll see if it keeps working. 
Thanks for the quick response. You guys rock!
