I encounter the problem when using library CoreFtp 1.3.6 to connect to FTP server
It always open high port (50000+) at server side instead of port 20.
this problem doesn't be shown in FileZilla client or Window FTP cmd and another library, and I assume that they can detect active mode FTP.
My question is it is possible to force the FTP server to use active mode FTP instead of passive in case the FTP client prefer transfer mode in different or not know what the transfer mode of client is?