The FTP Client Connector is a transport Connector that requires a Parser to operate. You can use the Connector to read or write a data stream that can either be a file or a directory listing. Think of the FTP Client Connector as a remote read/write facility, not something you use to transfer files.
This Connector supports FTP Passive Mode, as per RFC959. Passive Mode reverses who initiates the data connection in a file transfer. Normally the server initiates a data connection to the client (after a command from the client), whereas passive mode enables the client to initiate the data connection. This makes it easier to transfer files when the client is behind a firewall.
With proper configuration, this Connector supports FTP over SSL (FTPS) connections, to provide secure transfers.