Little Snitch
A firewall protects your computer against unwanted guests from the Internet. But who protects your private data from being sent out? Little Snitch does!

Protect your privacy

Connection Alert

As soon as you’re connected to the Internet, applications can potentially send whatever information they want to wherever they want.

Sometimes they do this for good reason, on your explicit request. But often they don’t. Little Snitch allows you to intercept these unwanted connection attempts, and lets you decide how to proceed.

Little Snitch informs you whenever a program attempts to establish an outgoing Internet connection. You can then choose to allow or deny this connection, or define a rule how to handle similar, future connection attempts. This reliably prevents private data from being sent out without your knowledge. Little Snitch runs inconspicuously in the background and it can also detect network related activity of viruses, trojans and other malware.

Define whom you trust

Configuration Window

Little Snitch provides flexible configuration options, allowing you to grant specific permissions to your trusted applications or to prevent others from establishing particular Internet connections at all.

So you will only be warned in those cases that really need your attention.

Keep an eye on your traffic

Little Snitch includes a Network Monitor, showing detailed information of all incoming and outgoing network traffic.

A status icon in the menu bar provides a summary of current network activity, and a monitor window with more comprehensive information pops up automatically in case of new traffic events.

Network Monitor

Follow us on Twitter

Follow @littlesnitch on Twitter to get informed about new versions and other Little Snitch related tips and news.

Download

Little Snitch 2.5.2
3.1 MB

Mac OS X 10.4 - 10.7

Built-in 3-hour trial.
Non-expiring licenses are available here.
Release Notes

Highlights

  • Rule based traffic filtering
  • Connection alert warns about Internet access for which no rule exists yet
  • Network Monitor for visualizing and analyzing network activity in real-time
  • Powerful configuration interface
  • “via” rules for applications communicating via Unix tools
  • DNS based rules
  • Domain wildcard rules
  • Comprehensive multi user support
  • Rules can be defined per-user or globally for all users
  • IPv6 support
  • German Localization
  • Works on PowerPC and Intel based Macs running Mac OS X 10.4 or later
Macworld
“Little Snitch 2 marks such a dramatic improvement in user interface and functionality that I can unreservedly recommend the affordable upgrade, or an initial purchase.”

Mark H. Anbinder, May 2008
Mac Gems: Little Snitch 2.0.3