I have a T3200M router and for many months I was hosting a Minecraft server on my computer with the port TCP 25565. Since then it stopped working, and this https://www.yougetsignal.com/tools/open-ports/ says the port is closed, even with the server running. I have tried everything I can think of, I've double-checked and triple-checked that all the settings and numbers are correct, but still no success. Nobody can connect, and the port remains closed.
There are probably more things I did that I cant think of right now, having struggled with this for a few hours now, but I really don't know how it could just stop working like this. Any help is appreciated.
If your external IP matches the router WAN IP then your service is not behind carrier grade NAT.
What router firmware version are you on? There was an update recently rolled out so it may be that your router needs a reboot. I'm on the new version and my port forwarding still works fine.
Now that I think about it, I never actually restarted the router since around last month when it was last working. The router is on firmware version 31.164L.22, and I can confirm that the WAN IP matches the external IP shown online. I also made sure that the IP address in the port forwarding menu matches the IP of my computer that I am running the server from. With this in mind, I'm guessing the next logical step would be to restart the router and I will try that when I get home.
Try using a VPN and see if it works. That's what I did for some other issues and it worked. If it does. Please let us know because it could be Telus has issues that are affecting customers in a variety of ways.