[Samba] Questions about reverse zone

Rowland penny rpenny at samba.org
Mon Apr 27 15:15:10 UTC 2020

On 27/04/2020 15:58, Miguel Angel Coa M. via samba wrote:
> Hi Guys,
> I've two DC (Zentyal Samba 4.7.6) and put new DC (Centos 7, Samba
> 4.7.6) with additional domain controller and works fine.
I take it that you mean you had two DC's and have joined another one, 
but using Centos 7, are you using the Centos packages, or have you 
compiled Samba yourself, or are you using third party Packages ?
>   My question is
> about reverse zone. The original DC (zentyal1 and zentyal2) have a reverse
> registres
> ```
> root at zentyal1:/etc/bind# dig +noall +answer -x
> 259200 IN PTR zentyal1.example.com.
> root at zentyal1:/etc/bind# dig +noall +answer -x
> 259200 IN PTR zentyal2.example.com.
> root at zentyal2:/etc/bind#
> ```
> But the new server not have reverse registre
> ```
> root at zentyal1:/etc/bind# dig +noall +answer -x
You will need to create the reverse record for your new DC.
> I try checks revrse zone but this not exist
> root at zentyal1:/etc/bind# samba-tool dns query zentyal1
> 250.13.10.in-addr.arpa @ ALL -U administrator
> Password for [EXAMPLE\administrator]:
> ERROR(runtime): uncaught exception - (9714,
That isn't querying for the reverse zone, that is querying for a reverse 
zone record ;-)
> I have two questions:
> 1. ¿is necesary create this zone and put the new DC inside?
If the reverse zone doesn't exist on the new DC, but does on the 
original two, then you would seem to have replication problems.
> 2. From RSAT and DNS administration the domain not have reverse zone . So,
> ¿where does this info come from?

The reverse zone is stored in AD and should be available on all DC's, 
that is unless Zentyal does something strange like using the unsupported 
Bind9 flatfiles.


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