Windows Firewall Control is a nifty little application which extends the functionality of the Windows Firewall and provides quick access to the most frequent options of Windows Firewall.
High Filtering - All outbound and inbound connections are blocked. This profile blocks all attempts to connect to and from your computer.
Medium Filtering - Outbound connections that do not match a rule are blocked. Only the programs that you allow can initiate outbound connections.
Low Filtering - Outbound connections that do not match a rule are allowed. The user can block the programs he doesn't want to allow initiating outbound connections.
No Filtering - Windows Firewall is turned off. Avoid using this setting unless you have another firewall running on your computer.