VPS Guide: Your Go-To for VPS, Ubuntu & Command Line Success

Install Fail2ban with Debug on Ubuntu

Category: VPS Setup

Run Fail2ban in debug mode on Ubuntu—install with

apt install fail2ban

then stop with

systemctl stop fail2ban

Start manually with

fail2ban-server -f -x -v

—expect verbose output like \"INFO jail ‘sshd’ started\" Configure /etc/fail2ban/jail local with a basic SSH jail:

[sshd]\nenabled = true\nport = 22\nfilter = sshd\nlogpath = /var/log/auth.log

Open SSH with

ufw allow 22

test with failed logins and watch logs in real-time On Linode this debugs MySQL or FTP issues—restart normally with

systemctl start fail2ban

after ensuring uptime with verified configs