To encrypt the FTP connection SFTP can be used fairly easily as long as the ftp client supports SFTP, which supports FTP over SSH. In this case, FileZilla was used. To enable SFTP enable FTP and SSH. Create a user with appropriate permissions. Then create a connection in FileZilla configuring the connection with SFTP. Once the connection is made verify the connection is encrypted.
Another way to have an encrypted FTP connection is FTP over TLS. Unfortunately, the vsftpd does not support an SSL connection. Using SSH is recommended.
ST-IPm-8460
VT-mIPm-248-D
VT-mIPm-138-D
Sixnet I/O Tool Kit 5.0.101 or later
Industrial Controller firmware 7.0.101 or later
An encrypted connection can be initiated by an SFTP client by enabling SSH, FTP and enabling users. This function used the sftp-server on the Industrial Controller to make an encrypted connection.
To make an encrypted connection with SFTP client like FileZilla.