Port forward doesn't work

Yes, I do have Xfinity xFi Gateway and I did try to open port using Xfinity phone application. Didn't work.

Yes, I'm using Xfinity xFi Gateway and used Xfinity phone application to open port....didn't work.

Some additional things you can try is setting up the port forward settings and power cycle the modem @user_kos61m. You can also try to disable the xFi Advance Security to see if that is blocking any incoming connections. Outside that, we would recommend reaching out to the original equipment manufacturer (OEM) to assist troubleshooting their equipment. We can assist providing how to set up port forwarding, but as an advance networking feature, out support outside that is limited.