samba - Sep 2021 - samba AD-DC with bind9, dyn-dns complains that "No AD dhcp user exists"

On 09 September 2021 23:35 Carlos Jesus wrote:
> No problem Roy, you're talking to the noise master here...
> Ok. Bottom line, is there any way to create _msdcs.domain without using
> samba-tool and/or RSAT? I don't really mind reseting ALL zones and
> repopulate them again using dhcp. Wouldn't delete
> /usr/local/samba/bind-dns/dns/sam.ldb.d/* and reset the DNS Backend to
> something like that?
Rowland is your man here, but there is normally a file in the
"/usr/local/samba/private" folder called "dns_update_list". 
This normally includes the _.msdcs zone etc.   It is used by the samba_dnsupdate
script to populate DNS when the domain is created, or a DC is added.   So you
could inspect that file and confirm it includes the _msdcs zone then try:

samba_dnsupdate --verbose  --all-names

You said in an earlier post you were getting "dns_tkey_gssnegotiate: TKEY
is unacceptable errors" - this needs to be resolved first.   I have found
in the past that the file dns.keytab is in the folder: /usr/local/samba/private.
This needs to be moved to the /usr/local/samba/bind-dns folder and the group
permission set to allow bind to read it.   May be worth checking this.   Also
the first line in /etc/resolv.conf needs to point to the actual ip address of
itself (not 127.0.0.1 and not other DCs in the domain).

HTH

Roy

On Fri, 2021-09-10 at 08:44 +0100, Roy Eastwood via samba
wrote:
> 
> Rowland is your man here, but there is normally a file in the
> "/usr/local/samba/private" folder called
"dns_update_list".   This
> normally includes the _.msdcs zone etc. 
It always includes _msdcs zone, but if the zone isn't there, it cannot
create the zone.
>   It is used by the samba_dnsupdate script to populate DNS when the
> domain is created, or a DC is added.
No it isn't used when a domain is created or a DC is added, it is used
by samba_dnsupdate when Samba is started and then every 10 minutes
thereafter.
>    So you could inspect that file and confirm it includes the _msdcs
> zone then try:
It doesn't, that is what my ldbsearch was for.
> 
> samba_dnsupdate --verbose  --all-names
That will just update the records from dns_update_list, but it will not
create records if the base DN does not exist.
> 
> You said in an earlier post you were getting "dns_tkey_gssnegotiate:
> TKEY is unacceptable errors" - this needs to be resolved first.
No the dns problem needs fixing first, it might fix this problem as
well.
>    I have found in the past that the file dns.keytab is in the
> folder: /usr/local/samba/private.   This needs to be moved to the
> /usr/local/samba/bind-dns folder and the group permission set to
> allow bind to read it.   May be worth checking this.   Also the first
> line in /etc/resolv.conf needs to point to the actual ip address of
> itself (not 127.0.0.1 and not other DCs in the domain).
> 
> HTH
> 
> Roy
Rowland