On my Mac I’ve got firewall so I should fill secure. But as we know there are so much application which sends data from our computer thought firewall. I found very nice application called “Little Snitch“. It’s cost just 29.95$ and you can evaluate it for free, there is only one problem application stops every 3 hours and than you can restart it.
Installation is quick, but after installation is finished restart is required. After restart my machine starts for very very very long time, but finally it has started. Little Snitch has predefined rules and this rules is good start.
It also has nice monitor which shows current use of network.
Very nice and useful application for person who wants to make his mac more secure.