@TP-Link 2 things helped to fix this, and apologies as it looks like it was NOT the Deco firmware. Please pass these on to others with similar issues: Windows/McAfee firewall was blocking all ports....

Seems like port forwarding is broken in most/all TP-Link devices. This is a basic feature! I've seen in other threads that there is a beta firmware that fixes this. No other fixes have worked. How...

@TP-Link If you have a beta firmware for the x60 that works I'd like to test it. Please contact me.

@kubbie yep, and they just pushed out a new firmware in the last month. Totally unacceptable. I've had tp-link routers for years. Think I'll need to switch.

@Vraj.Patel This is still broken and it's been months. Every other router does this just fine. Changing the subnet mask to 255.255.255.0 is not working.