Connecting to Horizon over Private IP 10.20.20.1

Hi-

Im new to Ubuntu MicroStack and have a four node cluster up and running, but I am unclear on how to remotely connect to the Horizon interface available on the virtual network of 10.20.20.0 from my existing LAN of 192.168.1.0.

I don't want to have to run a GUI from the control host to access it, but would like to be access it from anywhere securely.

Thanks in advance.