[Samba] Help, DNS forwarding not working!

[Rowland Penny]

On Tue, 29 May 2018 13:40:50 +0200
Ole Traupe via samba <samba at lists.samba.org> wrote:

> Hi list,
> 
> Today, DNS forwarding stopped working for my domain, and I have no
> clue as to why. We are using Samba internal DNS.
> 
> It stopped working for one DC on old hardware a couple of days ago. I 
> suspected a hard drive issue (bad blocks in DNS related files) and 
> wanted to replace the server in the next days.
> 
> Today I rebooted the other DC due to maintenance of the host machine, 
> and DNS forwarding stopped working there as well.
> 
> I am puzzled as everything else seems to be working fine (Windows 
> log-ons, file access on a member server).
> 
> Where can I look, what can I do?
> 
> Please help. This domain is in production and we basically don't have 
> any internet now.
> 
> Thanks,
> Ole
> 
> 
> 

First post your smb.conf
Can you ping the forwarder from the DC ?
Is anything listening on port 53 on the DC ?
Is anything listening on port 53 on the DC that shouldn't be ?
OS ?
Samba version ?

Rowland