Unable to RDP to HyperV servers from outside the network.

Hello,

We have a Hyper V 2012 deployment on two identical Dell T320 servers. I am deploying a new RDS 2012 HyperV Virtual Machine to replace our 2008 Terminal server. Everyone can reach the RDS 2012 HyperV Vm (an all other virtual machines) just fine within the network. I configured the firewall for 3389 to the RDS server at 192.168.X.X but cannot connect to it. There is no Windows Firewall Active and RDP is set to allow.

I tried this with all the Hyper V virtual machines, none are reachable via RDP from the outside. However, i setup firewall rules to the Dell T320's for RDP and connect just fine. 

What am I doing wrong?

Thanks!