It's a simple configuration, but hard to find. We know because we looked! To enable the use PCAnyWhere with any server using the IIS firewall you need to drill down as follows:

Advanced Management
Computer Management
Services and Applications
Routing and Remote Access
IP Routing
NAT/Basic Firewall

After selecting NAT/Basic Firewall on the left you should see several items on the right including 'Network Internet Connection'. Click on it once and inspect its properties. On the window that displays select the
'Services and Ports' tab and then click on the [Add] button.

Continue to add each of the following items to create two (2) new entries on the list:
1. Description=PCAnyWhereTCP, select protocol =TCP, Incoming port=5631, Private address=(the external address for your server) and Outgoing port=5631. Then click [OK]

2. Description=PCAnyWhereUDP, select protocol =UDP, Incoming port=5632, Private address=(the external address for your server) and Outgoing port=5632. Then click [OK]

If you have PCAnyWhere properly installed and configured for external users you should be ready to go!

Well, yes that is port forwarding. You could also forward port 3389 to the servers address and that will give you remote connection from your WAN addy