KB Article #66307
Does SecureTransport support Implicit FTP
Problem
Does SecureTransport support Implicit FTP? How to configure ST for implicit FTPS over port 990?
Resolution
The current implementation of the FTP protocol in SecureTransport does not have the implicit option integrated. It's an implementation that's considered a depreciated method of negotiating SSL as it's not defined in the RFC-4217 specs.
Implicit FTPS over port 990 is not supported.