This server does not allow plain FTP. You have to use FTP over TLS

Products

• VMware vCenter Server

Issue/Introduction

Symptoms:

• When restoring a file based backup, you see the error

"This server does not allow plain FTP. You have to use FTP over TLS" on trying to use the same ftp server used to create the backup.

i.e.: ftp://backupserver.fqdn

Environment

VMware vCenter Server Appliance 6.7.x

Cause

The FTP server requires a secure access.

Resolution

To solve the issue use ftps:// instead of ftp://