====== fail2ban Blocks Coolify Container After Repeated SSH Failures ======

**Affects:** [[folkzone:services:coolify|Coolify]]

===== Symptom =====

After repeated failed SSH connection attempts during Coolify setup, ''fail2ban'' bans the Coolify container's IP, causing all subsequent SSH attempts to silently fail even after the key is fixed.

===== Check if banned =====

<code bash>
sudo fail2ban-client status sshd
</code>

Look for the container IP (typically in the ''172.18.x.x'' range) in the banned list.

===== Unban =====

<code bash>
sudo fail2ban-client set sshd unbanip 172.18.0.7
</code>

===== See Also =====
  * [[folkzone:troubleshooting:start|Homelab Troubleshooting Index]]

  * [[folkzone:troubleshooting:coolify_ssh_setup|Coolify SSH Key Setup]]
  * [[folkzone:infrastructure:security|Security (UFW + fail2ban)]]
  * [[start|Return to wiki home]]