In this tutorial, we will explain how to install Fail2ban on an Ubuntu 14.04 VPS. Fail2Ban is a Python application that monitors log files to detect potential intrusion attempts. Fail2ban scans the log files looking for specific patterns that indicate an attack. It uses iptables to block IPs that show the malicious signs such as brute-force attempts on SSH, HTTP, FTP, SMTP ..etc. This guide should work on other Linux VPS systems as well but was tested and written for Ubuntu 14.04 VPS.
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