Applicable to:
- Plesk Onyx for Linux
Symptoms
-
Plesk Onyx 17.8 Update #1 or #2 is installed on the server:
# plesk -v
Product version: Plesk Onyx 17.8.11 Update #1An error is displayed on attempt to configure FTPS in Plesk > Tools & Settings > Backup Manager > Remote Storage Settings > FTP:
PLESK_ERROR: Error: Unable to access the storage: Transport error: unable to list directory: Curl error: (48) An unknown option was passed in to libcurl: 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 ftp-user 'ftp://example.com//backups//' -
The command in the error works correctly on the server
-
Following warnings are displayed in Plesk > Tools & Settings > Backup Manager if FTP storage was already configured:
PLESK_WARN: Warning: Unable to display the list of backups from FTP storage Unable to get ftp dumps list: FTP network error. Check the FTP storage settings.
PLESK_WARN: Warning: Unable to access the storage: Transport error: unable to list directory: Curl error: (48) An unknown option was passed in to libcurl: 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 ftp-user 'ftp://example.com//backups//'OR
Following error is displayed instead of Backup Manager:PLESK_ERROR: Error: FTP network error
-
Similar lines can be found in the
/var/log/plesk/panel.log
:CONFIG_TEXT: ERR [panel] Failed to get dump 'backup_1803100000.tar': Error code: 126: FTP network error
ERR [panel] FTP network error -
If scheduled backups are stored on the remote FTP storage, following error can be found in the
/usr/local/psa/PMM/logs/backup-<date>/backup.log
:CONFIG_TEXT: INFO: TransportError[babecafe-3a5d-4578-dada-b2d6b441e241]: Transport error: unable to check file existence: Curl error: (48) An unknown option was passed in to libcurl: Last FTP request: Last FTP response: [common/plesk-utils/PMM/repository-transport/transport.cpp:1196]
virtual bool plesk::tRepositoryFtp::IsExist(const string&)
INFO: pmm-ras finished. Exit code: 126 -
Following error is also sent to the administrator's mail address if the scheduled backups are configured:
PLESK_INFO: FTP network error
Unable to access the storage: Transport error: unable to list directory: Curl error: (48) An unknown option was passed in to libcurl: 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 ftp-user 'ftp://example.com//backups//' -
FTPS is enabled in the remote configuration:
# plesk db -Ne 'SELECT value FROM BackupsSettings WHERE param = "backup_ftp_settinguse_ftps"'
true
Cause
Plesk bug with ID #PPPM-8125, that will be fixed in upcoming updates.
Resolution
As a workaround, disable FTPS directly in the remote FTP configuration:
- Log into Plesk
- Navigate to Plesk > Tools & Settings > Backup Manager > Remote Storage Settings > FTP
- Disable Use FTPS and apply changes
Note: If FTP network error is displayed instead of the Backups Manager, use the following article to access it: Cannot access Backup Manager: 504 Gateway Timeout
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