If it is necessary to open a port (usually 5101) to allow FastClose Clients to communicate with the server, follow the following steps:
In the Windows Control Panel area, locate and launch the Windows Firewall application, a screen similar to this one should be displayed:
Click on "Advanced Settings" (above) and then on "Inbound Rules" in this new screen displayed:
Click "New Rule" on the right hand side, select "Port" as below and click "Next".
Type 5101 in the box below, or if changed from this default in the installer, whatever port number was entered. Then click Next.
Accept the default "Allow the connection" in the next step:
and Domain and Private in the next step:
In the final step, give the rule a name, such as "FastClose Server" and click Finish:
and exit the Windows Firewall application.