Port Forwarding not working

I recently purchased a new laptop and followed the Xfinity directions on setting up port forwarding (https://www.xfinity.com/support/articles/xfi-port-forwarding). I opened up the app, deleted my old laptop from the list, selected my new laptop, and added the port (2346). Nothing. The port remains closed. I reset my modem. Nothing. The port remains closed. I scoured these forums and followed various directions from Xfinity employees. Nothing. The port remains closed. I opened up the old Gateway Admin and verified I had not set up a static IP. Nothing. The port remains closed. I made sure my old laptop was set to DHCP and not for Reserved IP. Nothing. The port remains closed.

Edit: I now no longer have access to 10.0.0.1