Port Forwarding

@XfinityVictor​ Yes.

Have you followed these steps?

ADD A PORT FORWARD WITH AN XFI GATEWAY
Open the Xfinity app and sign in with your Xfinity ID and password.
Select the WiFi tab.
Select View WiFi equipment.
Select Advanced settings.
Select Port forwarding from the menu.
Select Add Port Forward.
Note: If you've previously set up a port forward from your Gateway's Admin Tool (http://10.0.0.1), you should see it listed in the Port Forwarding Settings.
Choose the household device for the port forward you're setting up from the drop-down list of connected devices.
Note: If you don't see the device listed, it may not be connected to your home network.
Choose from the list of common applications to use a recommended, preset configuration (e.g., Xbox or PlayStation) or select Manual Setup to enter specific port numbers, ranges and/or protocols.
Select Apply Changes to complete the setup of the port forward.
The device you set up for this port forward can now use these settings.
Note: If you're unsure which port settings to choose, reference the device manual or the application you're trying to use.
Opening unnecessary ports isn't recommended, as it may pose a security risk.

@XfinityVictor​ Yes, the port is shown as forwarded in the app. The port is not actually open, though. As for the admin tool, the section for port forwarding just redirects you to use the app, as in the screenshot on Xfinity's help page.

Thank you for the confirmation @user_2aybgi. Is the port that is shown as open associated with a device? If it is associated with an incorrect device you can delete that through the app, or edit the association if needed. Also make sure you did not set a static IP for the device using the Gateway Admin page (10.0.0.1). If you did, the static IP should be removed, the Xfinity app will use the IP address from DHCP to set a static MAC bind and establish the port forward rule. Also  confirm that the device is using an IPv4 address to connect to the network and not an IPv6 address. The Xfinity app can only support port forwards for devices using IPv4 addresses.

It is associated with a desktop, and the admin tool lists it as a reserved IP. The admin tool will not change it back to DHCP. The device has both an IPv4 and IPv6 address, as windows standard.

@clarkma5​ 

Start your own thread. 

@Again​ I just did, a second thread I will add because my first one regarding only the advanced security settings is also being ignored, and every user starting their own thread for the same problem that rather defeats the purpose of having a forum where users can talk about having the same issue. Whoever has been moderating this thread this whole time should be ashamed of themselves. Customer service at Xfinity is awful. It sure seems like this is all structured to ignore this issue and not provide support, and not guide customers to how to get support.

@clarkma5​ 

I have not been moderating this thread; I only just replied to you.

However, I am going to moderate it and close it to further replies.  You need to be patient and wait until an Official Employee replies to you.  For the most part this is not real time help.  You should get a notification whenever someone replies to you.