Scudo Firewall is a hybrid firewall with an easy and intuitive interface. It helps you protect your computer’s network services from unwanted connections from remote computers and improves your privacy and security by controlling all apps' network activities letting you choose which apps are allowed to connect to the network.
Scudo firewall policies can be configured to be inclusive, exclusive or interactive. So you decide if you want a completely silent firewall that does not require your interaction, or an interactive firewall that requests your action when needed.