[Samba] Secondary DNS on active directory possible?
markus.mueller at cup.lmu.de
Mon Dec 19 18:50:10 UTC 2022
Hi Samba community
first post on this list, so apologies in advance for mistakes.
I run a Samba AD domain (let's call it myAD.mydomain.net) with DLZ DNS
backend (Ubuntu 20.04, vanilla Samba install) which I migrated from an
NT-style domain. Not all machines in my network participate in the AD
(some Linux only machines and guests), which is why I have a separate
'master' DHCPD/bind9 server (let's call it master.mydomain.net) serving
zone mydomain.net. The AD host (nameserver.myAD.mydomain.net) serves
Ideally, I would like to have the Samba-DNS serving the requests from
myAD.mydomain.net and the DHCPD/bind9 machine serving mydomain.net
(which they do). But: the samba AD should forward all requests for
mydomain.net to the master nameserver (which it does not, even though I
set the dns forwarder to master.mydomain.net in smb.conf). It should be
possible (in my opinion) by creating a secondary DNS zone on the Samba
AD (nameserver.myAD.mydomain.net). But that doesn't seem allowed.
samba-tool allows me to create that zone, but I couldn't figure out how
to do the slave config (e.g. setting the master server). The Microsoft
DNS tool does not allow me to create a secondary zone at all.
Why do I try so complicated? My general nameserver failed recently from
a segmentation fault and my whole intranet went down (because my dhcpd
relies on client identification via DNS, mainly for historical reasons).
I would like to have a backup nameserver, but I prefer not to install
yet another instance.
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