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!