I need help with creating either a vhost or reverseproxy setup for Filr

Setup : I have a machine which is running an apache webserver on server.mydomain.com
I have installed a Filr VA on the internal network on

Now I want to ask your help :
Can I create a vhost or Reverse proxy for setting up access on :

How Can I do this?
Do I need other ports to be opened/forwarder in my firewall ?