Configure your Minecraft server by following the setup steps carefully.
Configure your Minecraft server by following the setup steps carefully.
OP asks about the specific model of their Gateway, whether it's a standard Xfinity device or a third-party model. They mention that understanding this could help with troubleshooting, especially regarding port forwarding issues with some Comcast dual-stack gateways.
Consider assigning an external IP address of 0.0.0.0, then restart the modem/router and your PC, or temporarily disable and reactivate your network card after applying the settings.
After updating your external IP to 0.0.0.0, store the configuration and then reboot your computer and modem.
Follow the instructions provided by the manufacturer for port forwarding. Using your exact IP address might not be effective.