Plesk or hosted domains are not accessible: Connection timed out

Symptoms

• Plesk and/or domains hosted on Plesk are not accessible from a particular IP address with the following error in browser:

  CONFIG_TEXT: ERR_CONNECTION_TIMED_OUT

  CONFIG_TEXT: ERR_CONNECTION_REFUSED

• The IP address which is used for connections is marked as banned in Tools & Settings > IP Address Banning > Banned IP Addresses.
• Entries like the following can be found in /var/log/fail2ban.log. In this example, the IP address is 203.0.113.2:

CONFIG_TEXT: 2018-05-16 13:47:45,902 fail2ban.filter [1395]: INFO [recidive] Found 203.0.113.2
2018-05-16 13:47:46,408 fail2ban.actions [1395]: NOTICE [recidive] Ban 203.0.113.2

Cause

The IP address was banned by Fail2Ban due to repetitive login failures.

Resolution

1. Log in to Plesk.
2. Go to Tools & Settings > IP Address Banning > Banned IP Addresses tab.
3. Find and select the banned IP address from the list.
4. Click Unban.