How to fix FTP connection problems

Start here

Check the account and connection details

1. In Plesk, open Websites & Domains and then FTP Access.
2. Confirm the FTP username exactly as displayed; it may not be your email address or Plesk login name.
3. Set a new FTP password if there is any doubt about the saved password.
4. Use the assigned UKC server hostname, such as ukc12.uk, as the FTP host.
5. Remove accidental spaces before or after the hostname and username.

Read the connection log

What common FTP errors mean

530 Login incorrect

The username or password was rejected. Verify the FTP account in Plesk and reset its password.

Connection timed out or refused

Check the server hostname and port, then try another network. Repeated failed logins may temporarily block your public IP.

Failed to retrieve directory listing

The login worked but the data connection failed. Set the FTP client transfer mode to Passive.

425 Cannot open data connection

Use passive mode and check that local firewall or security software is not blocking the passive connection.

Certificate name warning

Connect using the assigned UKC server hostname rather than the domain or raw IP address.

FileZilla

Force passive transfer mode

1. Open File > Site Manager and select the saved site.
2. Open Transfer Settings.
3. Choose Passive rather than Default or Active.
4. Reconnect and watch the message log for the first error.

Browser alternative

Use Plesk File Manager when FTP is unavailable

For a small upload or urgent edit, log in to Plesk and open Files. File Manager can upload, rename, extract and edit files without an FTP application.