Symptoms
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FTPS backup to remote vsFTPd server failed
PLESK_ERROR: Unable to create a remote backup. Error: Unable to export backup: Curl error: Unable to finish an upload: (18) Transferred a partial file: Last FTP request: APPE backup_2008050213.tar: Last FTP response: 426 Failure reading network stream: Connection to the FTP server has lost
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Backup FTP storage using vsFTPd FTP server could not be configured
PLESK_ERROR: Error: Unable to upload the file to the storage: Stream error: /check1/test: Curl error: Unable to finish an upload: (18) Transferred a partial file: Last FTP request: APPE test: Last FTP response: 426 Failure reading network stream: Connection to the FTP server has lost
Cause
Product issue:
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#PPPM-12277 “It is now possible to configure and use FTP storage on the vsftpd 3 servers.”
Fixed in:- Plesk Obsidian 15 September 2020
Resolution
Workaround
If update is not possible for some reason you may try the following
workaround
As a workaround follow steps below:
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Install the Panel.ini Editor from the Extensions menu in Plesk.
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Open Panel.ini Editor at Extensions > My Extensions.
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In Panel.ini Editor, switch to the Editor tab and add the following into Plesk
panel.inifile[pmm]
ftpForbidReuseConnection = 1
with