Telnet and passive FTP

Question

I\'ve a problem with my FTP test server. I\'ve installed and configured FileZilla server, It\'s listening for control connection on port 21, then it can provide passive mode

Answer 1

You cannot retrieve files over FTP protocol using a Telnet client.

While you can simulate the FTP client by typing FTP commands on a Telnet console, you cannot do file transfers this way. It's because for file transfer you need a separate data transfer connection, what the Telnet client cannot do.

That's why the FTP server fails. In an active mode, it fails to connect back to your client machine, because there's nothing listening. In a passive more, it timeouts waiting for the client to connect to its data port.