I access a remote desktop for work, and never had an issue until I swapped to the Hitron CGNM-2250 - now I can't connect (Error on windows PC says can't connect due to one of three reasons - remote access to server is not enabled, remote computer is turned off, remote computer is not available on the network.  On my macbook it says "we couldn't connect to the remote PC, make sure it's turned on, with error code 0x204).

I've disabled firewall on PC and Mac and port forwarded port 3389. I can't figure out what else this could be. I am able to reach the remote desktop without any issues from my office so it's nothing to do with the remote computer and definitely seems to be the new router. The remote connected requires a whitelisted IP, but we've double checked and my IP hasn't changed and is on the approved list. 

Any other ideas?

If it makes a difference, my PC is connected to the internet via ethernet and my macbook is on wifi.