Resolved Failed to retrieve directory listing

[MMM]

Unable to connect FTP Error: Failed to retrieve directory listing
Status: Connecting to xx.xx.xx.xx:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: TLS connection established.
Status: Logged in
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is the current directory
Command: TYPE I
Response: 200 Type set to I
Command: PASV
Response: 227 Entering Passive Mode (139,84,194,23,241,251).
Command: MLSD
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing
Status: Disconnected from server

 

[Peter Debik]

Please check your firewall settings that passive ports in the ephemeral port range are open. Normally, on fresh Plesk installations, this is automatically set, but on some old installations you had to do it manually as described in https://support.plesk.com/hc/en-us/...r-ProFTPd-on-a-Plesk-server-behind-a-firewall

If this does not help, please also check the firewall at your data center, that the port range is open there.

 

[MMM]

Thank you, Peter. I run the firewall script that open the right ports.
It has started working.