can anyone confirm me that in client machine internet explorer>Internet options>advanced to disable\uncheck "use Passive FTP" is secure or not. because when I am disabling\unchek use Passive FTP i can access the ftp but when i check\enable it ftp is not access.
I'm not entirely sure about that last thing @KarstenI .
If the MX didn't do any inspecting of FTP then active FTP on clients would not work, but they do.
I haven't tested it for quite some while with "Active", but based on the note "Note: Outbound active FTP is supported in MX Firmware version 12.25+ and 13.6+" there really could be some limited FTP-inspection. But not really as powerful as on other firewalls, which is the reason we have to do the mentioned configuration for passive FTP which is not needed for example on the ASA.