Protect your private data unwanted shipmentsLittle Snitch is a small tool that monitors inbound and outbound connections and alerts you of what service or process is responsible. 

In addition to informing you, Little Snitch is responsible for blocking potentially dangerous or hazardous connections, so that no program can make unauthorized to send information without you knowing connections. 

Little Snitch has by default some rules created to ensure the safety of your data, but you can edit and add your own.