It is not possible to get a directory listing by FTP using SSL/TLS secured connection:
Error: Failed to retrieve directory listing
Connection to FTP from
localhoston the server itself works fine:
Status: Connecting to 203.0.113.2...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Retrieving directory listing...
Firewall/NAT misconfiguration in between the Plesk server and the end-user.
Ensure that passive port range is configured on a Firewall and in Plesk: