Symptoms
Plesk Backup Manager loads very slowly and opens with one of the the following warning messages:
Warning: Could not display the list of backups in the FTP Storage: Unable to connect to the remote server. Please check the FTP storage settings.
Warning: Unable to access the storage: Transport error: unable to list directory: Curl error: (7) Couldn't connect to server: Last FTP request: Last FTP response:
Make sure you have entered the correct storage settings. You can check them independently with the command:
curl -v --ftp-pasv --ssl -k -u ftpuser 'ftp://server.example.com//backups/'
Cause
The remote FTP server is unreachable from the Plesk server.
Resolution
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Check if the remote FTP server is up and running.
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Check if the remote FTP server is available for FTP connections from the Plesk server. Run this command from your Plesk server:
# curl -v --ftp-pasv --ssl -k -u <ftp_server_address>
Additional Information
Additionally, it is possible to reduce FTP server timeout so that Plesk Backup Manager will take less time to open when an FTP server is not reachable:
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Connect to the Plesk server via SSH.
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Add the following lines to the Plesk configuration file
/usr/local/psa/admin/conf/panel.ini:Note: All values are in seconds.
[pmm]
ftpResponseTimeout = 30
ftpConnectionTimeout = 150
ftpRequestTimeout = 150