Unable to open ports..help?

Technical Support for Routers
1

I have an AT&T router and I followed the recommended settings of putting it in IP passthrough and turn off packet filtering and Advanced firewall rules, but nothing. I test the port via a website like https://portchecker.co/ and Open Port Check Tool - Test Port Forwarding on Your Router and it says the port isn't open.

I've rebooted both the Gateway and the Flint 2 with all the same issue, I'm on Firmware 4.7.0

Thanks for any help.

2

Hello @Fin745 you do not need to place your ATT on IP passthrough, you need to go to Firewall/(NAT/Gaming) section there and work with the ports you need to open for your other applications/routers.

3

I don't? I'll check that out thanks!

4

Sadly same issue, with opening the port on the ATT Gateway or gl-inet router or both, same issue with the port not showing as open.

5

Is your ISP behind CGNAT maybe?
What port do you try to open? Keep in mind that some ports will always show as closed, like WireGuard.

6

I don't know what CGNAT is, but my quick Googling says yes.
The port is 49927

7

If your ISP forces CGNAT you won't be able to open any port, I am sorry.

8

Well such as my luck!

Thanks for the help though.