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FTP as a protocol is a bit of an odd duck. It uses two TCP connections, rather than just the one most protocols use. You have port 21 the command and login connection and a second connection, the data connection. With passive FTP the second connection is to a randomly assigned available TCP port above 1024. You problems seem to indicate you don't have ...


See: ProFTPD - Failed to retrieve directory listing while using TLS it might be a problem with the related rules of a firewall between you and the server.

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