[Samba] standalone ADDC with samba_internal dns backend - windows client do not register in dns

[David STIEVENARD]

Hi

first project with samba, first post on this mailing list and, actually, 
first time using a mailing list ever ;-)



In summary
==========================================
I try to install samba in a test VMs, everything seems fine but when 
windows client joins the domain it doesn't register in samba's internal dns



in detail
==========================================
My objective
- for a small business (200 users), get rid of an old microsoft AD and 
use Samba instead
- before going into production, I test the setup on VMs to learn how the 
beast behaves
- I use the "internal_dns" as a dns backend


Problem :
- domain provision is ok
- all tests are ok
- windows client (7pro or 10pro) joins the domain without complaining 
but it doesn't register in the dns


My source of informations :
- for the setup : 
https://wiki.samba.org/index.php/Setup_a_Samba_Active_Directory_Domain_Controller
- for the verification : 
https://wiki.samba.org/index.php/Setup_a_Samba_Active_Directory_Domain_Controller#Testing_your_Samba_Domain_Controller
     - all thoses tests on the domains are ok
- I found also this 
https://wiki.samba.org/index.php/Fix_DNS_dynamic_updates_in_Samba_versions_prior_4.0.7 
but the version I use are older then 4.0.7
     - tried ipconfig /registerdns -> same problem


The operating systems OS I tested :
- samba 4.2.7 binary pkg on FreeBSD 10.2                     -> works, I 
can't find why
- samba 4.3.3 binary pkg or ports on FreeBSD 10.2        -> same problem
- samba 4.3.8 binary pkg on FreeBSD 10.3                     -> same problem
- samba 4.4.2 with github on Debian 8.4 -> same problem


Any suggestion will be appreciated !

Thanks
DS