Vallum Application Firewall

Vallum is a small app that helps you increasing your privacy and the security of your Mac blocking apps from leaking data on the network.
Apps installed on your system are allowed to make unsolicited connections to the Internet or to the local network, and they often do it without asking your permission. Vallum is able to identify and block these connections according to your preferences, in a friendly and intuitive way. You choose whether you want an interactive firewall or a silent firewall.
Vallum is designed for being easy and not intrusive in its default configuration. It requires no maintenance or interaction, and does not annoy you with popup alerts. It’s just a matter of dragging apps icons to create your configuration and then forget it. However its attitude can be altered simply playing with rules and the few options available. So for example you can activate the notification alerts system to display popup alerts whenever an app tries to connect, and then decide to pass it or block it on the fly. Or you can interact with Murus and the OS X built-in PF packet filter to manage connections at both application- and network level.
Vallum is easy and safe. Install it in one mouse click, start from predefined configurations or build your own one in seconds, restart from scratch in one mouse click, uninstall in one mouse click. Everything is managed from the Vallum menulet in OS X menu bar, near the clock.