INFO: TLS/SSL implicit and explicit modes difference

Communication schema:

1. Client connects to the server.
2. Client talks to the server over this unencrypted channel.
3. Username + password is sent unecrypted.

Communication schema:

1. Client connects to the server.
2. Client explicitly requests TLS/SSL encryption to be switched on.
3. Client talks to the server using encrypted channel.
4. Username + password is sent encrypted.

Communication schema:

1. Client connects to the server and TLS/SSL encryption is switched on implicitely as soon as the channel is established.
2. Client talks to the server using encrypted channel.
3. Username + password is sent encrypted.

Ftp ftp = new Rebex.Net.Ftp();

ftp.Connect("example.com",21);

Ftp ftp = new Rebex.Net.Ftp();

ftp.Connect("example.com",21, 
  null, FtpSecurity.Explicit);

Ftp ftp = new Rebex.Net.Ftp();

ftp.Connect("example.com",21);

ftp.Secure(); // request encryption

Ftp ftp = new Rebex.Net.Ftp();

ftp.Connect("example.com",21, 
  null, FtpSecurity.Implicit);