Exchange, Lync FE and Lync Edge on a Single IP

I am trying to test a lab environment and would like to know is it possible to use a reverse proxy like IIS ARR to allow for a single external IP.

I have found that I can do it for lync without a reverse proxy so can I use it a reverse proxy for just the Exchange and Lync FE Server

http://blog.netnerds.net/2013/08/setup-a-fully-functional-lync-2013-lab-using-only-one-public-ip-address/

Ben