In this article, we’ll see how to secure your dedicated server by configuring three essential programs:
* Iptables: Firewall is the Linux systems, it is difficult to handle the first time but you can make very fine adjustments. In this tutorial I propose a set of standard rules for a web server.
* Fail2ban: it is a system that automatically ban all users who try to connect several times without success on our server. It helps prevent brute force attacks.
* Rkhunter: it is a software that warns of sensitive files that are changed. In other words, a good detector Backdoor and Rootkit.