After you configure a connection in Filezilla (https://klcweb.com/index.php/knowledgebase/124/How-to-configure-FTP-connection-with-FileZilla.html).
> File >Site Manager (Below Image)> " Transfer Settings" tab.
> Here you can choose between Default, Passive and Active.
If you have any issue making an FTP connection, you should try both Passive and Active to see which one works.