How to enable VETO FILES in Zentyal 3.4 Server

[bayuhidayat]

Hy everybody,
How to enable VETO FILES option in zentyal 3.4? Because I want to limit the files to be uploaded to the zentyal 3.4 server so that the files stored on the server are actually work related files (.xls, .doc, and .pdf).

I tried to add to /etc/samba/smb.conf as below:
################################################## #######
[global]
...
veto files = /*.mp3/*.mp4/*.3gp/*.avi/*.mkv/*.flv/*.exe/*.bat/*.ini/

#file sharing
[Public]
...
veto files = /*.mp3/*.mp4/*.3gp/*.avi/*.mkv/*.flv/*.exe/*.bat/*.ini/
################################################## #######

But still can not, but I have restarted samba service.

If I restart the zentyal server, the script is gone, does anyone know why it can happen?

Please help, thank you