However, there isn't just one door for every single network connection to go through, there are hundreds! Each of these doors is called a port, and each port is used for different purposes. This helps keep unwanted network connections from entering your computer, or in some cases, leaving it. Based on your rules, and its assumptions it will allow and deny connections through that door. You can get Little Snitch from Objective Development for $34.95.Ī firewall is a virtual door controlled by an application on your computer that lies between your computer and the internet. Little Snitch is an advance firewall application exclusively for OS X that allows you to control where an application can communicate to on the Internet. But some times there are some applications that just don't need to communicate with the Internet, or even worse, some apps that send information about your computer and how you use the app without your permission or even knowledge. All of these conversations - held in the background - help keep your system and applications running at tip top shape. Your computer, regardless of if you're using it or not, is constantly communicating with the Internet.
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