- Plesk for Linux
Unable to establish secure connection over FTPS to the Plesk server with the hostname example.com.
The following warning message could be bound using FileZila FTP client:
The server's certificate is unknown. Please carefully examine the certificate to make sure the server can be trusted
CONFIG_TEXT: Certificate expired!
Certificate for securing Plesk is not installed or not valid.
The certificate used for securing Plesk also used for FTPS connection to the server.
Install/renew a certificate for securing Plesk. Refer How to secure Plesk login page with SSL certificate for detailed instructions on how to secure Plesk with SSL certificate.
Note: Connection will be secured only if the connection goes to example.com. If the connection goes to any domain like domain.tld then multidomain SSL certificate must be used for securing Plesk.