Symptoms
- Plesk backup on the FTP storage fails with one of the following errors:
PLESK_ERROR: Error: Unable to operate the storage: Transport error: unable to delete file: Curl error: (18) Transferred a partial file: Last FTP request: NLST Last FTP response: 522 SSL connection failed; session reuse required: see require_ssl_reuse option in vsftpd.conf man page
PLESK_ERROR: Error: FTP connection failed, please check your FTP settings.
Repository error: Transport error: unable to list directory: Curl error: Login denied
PLESK_ERROR: Repository error: Transport error: unable to list directory: Curl error: FTP: couldn’t retrieve (RETR failed) the specified file
- Scheduled backup rotation does not work: previous backups are not removed.
Cause
vsftpd FTP-server is used as a remote FTP server.
This is Plesk bug with ID PPPM-5226 which is planned to be fixed in future Plesk updates.
Resolution
Until the fix will be available the following workaround is applicable:
- Connect to the remote FTP server using SSH.
- Add the following line into
/etc/vsftpd/vsftpd.confrequire_ssl_reuse=NO
- Restart
vsftpd
# service vsftpd restart
Additional information regarding vsftpd configuration can be found here .
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