Scudo helps protect your Mac computer’s network services from unwanted connections from remote computers and improves your privacy and security by controlling all apps' network activities. You can use Scudo to choose which apps are allowed to connect to the network.
Easy to install and start
Protect your shared documents and network services
Protect your privacy-blocking apps
Popup notifications: define inbound and outbound rules on the fly
Limit apps' upload or download bandwidth
Scudo 2 is a free upgrade
Unlimited fully functional trial version available