Configuring Windows Firewall In Vista

If you are not already using a 3rd party firewall such as, ZoneAlarm or Comodo, you will want to have something in place to protect from unauthorized access to your computer. Windows Firewall, while limited, is better than nothing at all.

Start by opening the 'Control Panel' and selecting 'Security'.

Next, select 'Windows Firewall'.

By default the firewall should be on (green). Select the 'Change settings' link under the 'Windows Firewall is helping to protect your computer' section.

A dialog will appear and should be set to 'On (recommended)'. Now, by default this will work. However, what if you wish to allow/disallow certain programs access through the firewall to the Internet. Select the 'Exceptions' tab across the top of the dialog.

You will see a list of common Windows applications. You can check the box next to the program to allow it as an exception. If you need to add a custom application not in the list, select the 'Add program...' button on the bottom of the window.

Select a program from the list to add it as an exception.

*You can also select the 'Change scope...' button for advanced features regarding subnets.

Back on the 'Exceptions' tab you will also see a 'Add Port...' button. By selecting this, you can open a custom port for an application not in the 'Add program...' list. Type in a name for the port as well as the port number. The transmission type (TCP or UDP) will depend on the specific needs of the application/port.