您确定要在端口443上进行连接吗?

Are you sure you want to be connecting on port 443?

那是通过HTTPS的FTP

Thats FTP over HTTPS

通常，您会使用SFTP之类的端口号22(通过SSH)

Usually you would use something like SFTP, port number 22 (Over SSH)

请问您是否可以澄清和测试?

Please can you clarify and test if you like?

谢谢