082 | Firewall Basics: UFW — Simple and Powerful Protection

August 14, 2025

Introduction: The First Line of Defense for Your Server

Before thinking about complex intrusion detection systems such as Fail2ban or CrowdSec, you need to build the first and most reliable line of defense—a firewall. A firewall controls all network traffic entering and leaving your server and blocks unauthorized connection attempts.

Traditionally, Linux servers have used iptables to manage firewalls, but its syntax can be complicated and confusing. Fortunately, there is a simpler and more intuitive tool — UFW (Uncomplicated Firewall).

080 | Classic Brute-Force Protection: Fail2ban

August 12, 2025

Introduction: Server Security — The First Line of Defense

Once you deploy any server or virtual machine, one of the first and most important tasks is ensuring its security. Even if your server doesn’t contain critical data, it can still be targeted by automated bots constantly scanning the internet for vulnerabilities. The most common type of attack against any server is brute-force password guessing, typically aimed at SSH access, FTP services, or web control panels.