Option 3: Enable a port range in advance. You can find more detailed instructions in the following procedure. You must build the programs first so the executable files exist.

Start the Windows Firewall Control Panel applet and enable the sample programs you plan to run. Option 2: Enable sample programs in advance. With this procedure, you may have to then restart the sample. The sample program in question can then be added interactively to an unblocked list. When a sample is run, a Windows Security Alert dialog box appears. Make no advance changes to your firewall configuration and proceed to start building and running the samples. Option 1: Interactively enable samples while running. To enable the firewall for the samples, complete one of the following procedures, depending on your requirements and security environment: The firewall is turned on by default and prevents access to these ports. Many of the samples communicate by using ports in the range 8000-8003, and port 9000. You must enable several ports or programs in the firewall so that the Windows Communication Foundation (WCF) samples can function.

Firewall control