Windows Firewall Actions in the System Registry
In order to get an idea of the number of options and controls that can be utilized for a more in-depth configuration of the Windows Firewall, the registry settings can easily be viewed in Registry Editor.
To access Registry Editor, open your Start menu and go to Run. At the insertion point, type Regedit – this will open the Registry Editor.
If you’re unfamiliar with the Registry Editor and adjusting Windows registry settings, this new window will appear a little daunting at first – however with the right use, and no ill-advised alterations you can’t damage your Windows installation unless you’re particularly careless.
To view a list of Authorized Applications, go to Edit > Find and copy the path below in to the box and click OK.
This list displays a list of authorized applications (click the image to see this in more detail) within the Windows Firewall – ones that have authorized access to the Internet. The list can easily be added to by the creation of a new String Value, or reduced by deleting the offending application filepath.
From this portion of the registry index, ports and restricted services can also be accessed, although it is rare that any of these should have to be changed.