Applicable to:
- Plesk Onyx for Linux
- Plesk 12.5 for Linux
- Plesk 12.0 for Linux
- Plesk 11.x for Linux
Symptoms
Unable to connect to FTP server on Plesk:
# ftp domain.tld 21
550 SSL/TLS required on the control channel
Login failed.
Remote system type is UNIX.
Using binary mode to transfer files.
Cause
Allow only secure FTPS connections
option is enabled.
Resolution
Set
Allow both secure FTPS and non-secure FTP connections
in
Plesk > Tools & Settings > Security Policy
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