Security is one of the most important things you need to consider if you have an online business. The best security practices for keeping your server protected include an advanced firewall service. Today we will discuss and explain how to install Config Server Firewall (CSF), which is one of the most advanced firewall services for a Linux VPS. The installation process is, as a matter of fact, very simple and it is not time consuming at all, so if you are ready, we can begin.