Unable to retrieve FTP directory listing via SSL/TLS secured connection

Dmitry Bystrov

10 months ago

Symptoms

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 localhost on 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: Connected
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:

For Linux:

For Windows:

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