In the second lesson of Dargslan's Fail2ban Mastery course, viewers learn how to install and configure Fail2ban to block malicious SSH login attempts. The tutorial covers installation via apt install fail2ban, enabling the SSH jail, triggering a test ban, and verifying the ban using iptables. The entire process takes under five minutes, making it an essential skill for Linux server administrators.
Steps Covered
- Installation: Use
sudo apt install fail2ban. - Enable SSH Jail: Edit the
jail.localfile to enable thesshdjail. - Trigger a Ban: Simulate failed login attempts to trigger a ban.
- Verification: Check banned IPs with
sudo iptables -L -n.
The lesson concludes with a recap of commands and a preview of the next lesson on Fail2ban configuration language. By the end of this tutorial, even beginners can protect their servers from brute-force attacks.