Windows Server 2008 Terminal Server Farm - Through Firewall (NAT)

Hi Everyone.

I have setup a Windows Server 2008 Terminal Server Farm with Terminal Server Broker for load balancing, everything works fine internally but now I want to allow users from outside via our firewall to connect.

On the firewall I can look to setup a single NAT to 2 internal addresses, but what about the broker?? How will external devices see this if I have only NATted out the terminal server farm members.

Need some help to understand how all this fits together.

Any help would be appreciated.

Thanks