samba - May 2022 - Migration 3.5 to 4.x, realm identical to domain

Hi there,

I am performing tests to migrate an old domain controller from Samba
3.5 + ldap + bind to Samba branch 4 to simulate an AD and I find myself
facing a problem with the domain name.

The current domain name is DOM.MONDOMAIN and according to the docs that
I read and test carried out, I cannot have an identical NDD and realm.
Is there a way to work around this problem or to rename the domain
without breaking everything (SID...)?

Thanks in advance.

On 5/31/22 04:00, Philippe Maladjian via samba wrote:
> Hi there,
>
> I am performing tests to migrate an old domain controller from Samba
> 3.5 + ldap + bind to Samba branch 4 to simulate an AD and I find myself
> facing a problem with the domain name.
>
> The current domain name is DOM.MONDOMAIN and according to the docs that
> I read and test carried out, I cannot have an identical NDD and realm.
> Is there a way to work around this problem or to rename the domain
> without breaking everything (SID...)?
>
> Thanks in advance.
I had this exact problem. The Realm is what matters. The Workgroup/NT 
Domain will become something like? MONDOM-NT,

Sure you can, but it's a choice.. 

you can do this.. 

1) use the DNS server for the 3.5 setup
2) use the DNS server from the 4.x setup

Using both DNS servers from both setups.. that's a problem. 

Greetz, 

Louis

> -----Oorspronkelijk bericht-----
> Van: samba <samba-bounces at lists.samba.org> Namens Philippe
Maladjian
> via samba
> Verzonden: dinsdag 31 mei 2022 10:01
> Aan: samba at lists.samba.org
> Onderwerp: [Samba] Migration 3.5 to 4.x, realm identical to domain
> 
> Hi there,
> 
> I am performing tests to migrate an old domain controller from Samba
> 3.5 + ldap + bind to Samba branch 4 to simulate an AD and I find myself
facing
> a problem with the domain name.
> 
> The current domain name is DOM.MONDOMAIN and according to the docs
> that I read and test carried out, I cannot have an identical NDD and
realm.
> Is there a way to work around this problem or to rename the domain without
> breaking everything (SID...)?
> 
> Thanks in advance.
> --
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On Tue, 2022-05-31 at 10:00 +0200, Philippe Maladjian via samba
wrote:
> Hi there,
> 
> I am performing tests to migrate an old domain controller from Samba
> 3.5 + ldap + bind to Samba branch 4 to simulate an AD and I find
> myself
> facing a problem with the domain name.
> 
> The current domain name is DOM.MONDOMAIN and according to the docs
> that
> I read and test carried out, I cannot have an identical NDD and
> realm.
I take it that 'DOM.MONODOMAIN' is a very bad Netbios domain name (aka
workgroup), if so then you are going to have to change it. I would do
this before the upgrade. I suggest you read this:

https://wiki.samba.org/index.php/Migrating_a_Samba_NT4_Domain_to_Samba_AD_(Classic_Upgrade)

Rowland