-tlsSecureControlConnection

The -tlsSecureControlConnection option is used to define whether the control connection from the FTP client to the FTP server is to be secured with TLS.

-tlsSecureControlConnection

NONE | OPTIONAL | REQUIRE

NONE

The control connection is never secured, in other words a corresponding AUTH command (see "FTP login commands") is rejected with a negative return code.
NONE is the default.

OPTIONAL

The control connection is secured when this is requested by the client.

REQUIRE

A login is only permitted if the control connection is secured beforehand.