The Bit Defender firewall controls all incoming and outgoing traffic. This is the feature that protects you against hackers and automated programs from accessing your computer without your knowledge. Bit Defenders Internet Security gives you many options to set the level of your firewall. The higher you adjust your settings, the more problems you may have as it may not allow certain programs to access the Internet such as web browsers. On the graph charts, you can see traffic that is incoming and outgoing from your computer.