QoS - Download Throttling and FTP Over TLS

Hello,

I'm using download throttling feature, it works fine for some serivices/applications, but I got issues for FTP.

I created a Traffic Selector Group, that contains these services: FTP Service (port 21), FTP Data (port 20), FTPS Implicit - channel (port 990), FTPS Implicit - data (port 989).

and these application definitions: FTP, FTP Control, FTP Data, FTPS, FTPS Data, SFTP, TFTPS, TFTP.

Then I created a Download Throtting rule that uses this Traffic Selector Group.

If I connect to a FTP server using Plain FTP (so, non secure connection) I got a limited bandwidth that maches to the setting of Download Throttling rule.

If I connect to a FTP server using Implicit FTP over TLS or Explicit FTP over TLS the bandwidth is not limited at all.

NB: I enabled Tracking Helper for FTP, TFTP.

Any ideas?

Thanks

Eclipse79