Hello, I've been having a certain issue.
In my home, we own multiple gaming consoles, and because of that, I resorted to buying a "gaming" router which allows all consoles to gain OPEN NAT since the Xfinity Router XB3 does not allow us to do multiple PortForwards for the same consoles.
Been trying to get it working but according to the instructions I need to set my Xfinity Gateway (The XB3) into Bridge Mode. I've done it countless times now and no luck. I connect my home computer to the router in Bridge Mode and there's an internet connection, no problem. I connect my gaming router (Netduma R1) to the router (Bridge Mode Enabled) and there is no internet access on the gaming router. What could be the issue? I've tried everything I could look up, so now I am here on the forums.
So quick summary.
1. Bridge Mode Enabled on Xfinity Router (XB3)
2. Internet connection detected on Computer
3. No Internet connection detected on Gaming Router (Netduma R1)
4. Gaming Router connected to Port 1 on Xfinity XB3 Router
P.S. Gaming router gains internet connection when XB3 has Bridge Mode Disabled. But get DOUBLE NAT Errors.
Since the XB3 works fine in Bridge Mode when connected to your computer, it's likely a configuration issue with the Netduma router.
You're probably going to find answers quicker on Netduma's support site:
Did you power-cycle / re-boot the XB3 after placing it in to bridge mode and having the Netduma router connected to port # 1 ?
What @EG said: