| This selection determines what type of connections the server will accept. The choices are between regular, unencrypted FTP and secure-FTP through the use of SSL/TLS. Make sure to review the section about creating your own server certificate before using secure-FTP! Regular FTP only, no SSL/TLS sessions
This is the default, the domain will not accept SSL sessions.
Allow SSL/TLS and regular FTP sessions
This option is also called explicit secure-FTP. The server will allow regular FTP sessions without encryption as well as encrypted FTP sessions using SSL/TLS. The FTP client determines if it wants the session to be encrypted or not by sending the AUTH command to the server to switch to using SSL.
Allow only SSL/TLS sessions
This option is also called implicit secure-FTP. The server accepts encrypted FTP sessions only, through the use of SSL/TLS. As soon as the client connects to the server it uses encryption, regular FTP sessions are not accepted. Instead of port 21 for regular FTP sessions implicit secure-FTP uses port 990 by default. |