samba - Jul 2025 - WERR_DNS_ERROR_DS_UNAVAILABLE when asking for local dns server info

I did a domain join from a windows PDC, the only reason to use a samba 
PDC .... otherwise we may as well keep using windoze

yes, clearly there is a configurazion that works, I get that

I keep asking the same question: How to find out what RPC servers are 
actually started or where possible error messages are written

there is clearly a bug that exibit invalid behaviour in some 
configuration that is legitimate





Il 2025-07-03 11:12 AM, Rowland Penny via samba ha
scritto:
> On Thu, 3 Jul 2025 10:55:32 +0200
> "CED Ing. Damiano Bolla via samba" <samba at
lists.samba.org> wrote:
>
>> there is no firewall, as I have written I can "manage" users
of the
>> domain from RSAT coming from another windows machine
>>
>> Do you have any idea on where it is written what rpc servers is
>> "registered" to work ?
>>
>> I had to use samba_upgradedns to go from a "no dns" to
internal dns
> Why did you do that ?
> Where did your domain come from ?
> Did you provision it as a new domain, or did it come from an earlier
> Windows domain ?
>
> Rowland
>

On Thu, 3 Jul 2025 11:29:45 +0200
"CED Ing. Damiano Bolla via samba" <samba at lists.samba.org>
wrote:
> I did a domain join from a windows PDC, the only reason to use a
> samba PDC .... otherwise we may as well keep using windoze
Yes, but what sort of Windows DC, w2k, w23k, W23kR2 etc ?
> 
> yes, clearly there is a configurazion that works, I get that
> 
> I keep asking the same question: How to find out what RPC servers are 
> actually started 
I have shown you a couple of ways of seeing if the rpc server is
running (which it seems it is) and I can show you in the code where the
message ultimately comes from, but just why you are getting that
message escapes me and I do not think it actually has anything to do
with the rpc server.
> 
> there is clearly a bug that exibit invalid behaviour in some 
> configuration that is legitimate
> 
If you can tell me where the domain came from, I may have an answer,
but if it is what I think, you are not going to like the answer.

Rowland

I am replying myself.... for fuurther reference

It is possible to have an idea on what is started by looking into the 
log /var/log/samba/log.samba

with level 5 in /etc/samba/smb.conf

[2025/07/03 11:40:59.181431,? 3] 
librpc/rpc/dcesrv_core.c:2899(dcerpc_register_ep_server)
 ? DCERPC endpoint server 'dnsserver' registered

please, the question is NOT on configuring or joining a domain, it is on 
how to debug/manage a weird behaviour of samba

yes, I understand that a vanilla installation works but reality is not 
"vanilla"

thanks


Il 2025-07-03 11:29 AM, CED Ing. Damiano Bolla via samba ha
scritto:
> I did a domain join from a windows PDC, the only reason to use a samba 
> PDC .... otherwise we may as well keep using windoze
>
> yes, clearly there is a configurazion that works, I get that
>
> I keep asking the same question: How to find out what RPC servers are 
> actually started or where possible error messages are written
>
> there is clearly a bug that exibit invalid behaviour in some 
> configuration that is legitimate
>
>
>
>
>
> Il 2025-07-03 11:12 AM, Rowland Penny via samba ha scritto:
>> On Thu, 3 Jul 2025 10:55:32 +0200
>> "CED Ing. Damiano Bolla via samba" <samba at
lists.samba.org> wrote:
>>
>>> there is no firewall, as I have written I can "manage"
users of the
>>> domain from RSAT coming from another windows machine
>>>
>>> Do you have any idea on where it is written what rpc servers is
>>> "registered" to work ?
>>>
>>> I had to use samba_upgradedns to go from a "no dns" to
internal dns
>> Why did you do that ?
>> Where did your domain come from ?
>> Did you provision it as a new domain, or did it come from an earlier
>> Windows domain ?
>>
>> Rowland
>>
>