Login to Plesk via FTP fails: unable to determine IP address

Symptoms

• FTP connection to the server cannot be established. FTP client returns the error:

  CONFIG_TEXT: 421 Service not available, remote server has closed connection

• The following error message is seen in the /var/log/messages log file:

  PLESK_INFO: getaddrinfo 'host.example.com' error: Name or service not known warning: unable to determine IP address of 'host.example.com domain'

• FTP server is unable to determine the IP address of the server by hostname:

  # ping host.example.com
  ping: host.example.com: Name or service not known ping `host.example.com`

Cause

Hostname misconfiguration.

Resolution

Note: if you don't have root access to Plesk server via SSH, contact your hosting provider regarding the issue

Define the correct hostname:

1. Login into Plesk.

2. Navigate to Tools & Settings > Server Settings .

3. Specify the required hostname.
   

4. Click OK .
   

or

1. Connect to the server using SSH.

2. Execute the command:

   # plesk bin server_pref --update -hostname host.example.com