[Samba] Internal DNS logging

[Giuseppe Cesa Bianchi]

Hi,

I have two Samba domain controllers version 4.6.4 on Centos 7.3.

I need to log every login/logout from windows PCs and I read on the wiki 
that I have to set log level >=3, this works.

The problem is that my log.samba is filled by internal DNS messages, 
most of them about forwarding.

in my smb.conf:

         log level = 3 auth:10
         vfs objects = full_audit

I googled around but I cannot find anything to avoid this.

Please help me!

Thanks