[Samba] Samba AD not resolving external names

[Peter Pollock]

I have just set up a new AD and am having a little success with it, but DNS
resolution is a little slow.

I'm looking into why that is and tried an ns lookup for google.com and got
the answer SERVFAIL on my AD server.

The query was then passed to my next nameserver (google's own dns), which
handled the query.

Is this correct behaviour? I've not seen SERVFAIL before

itadmin at dc02:~$ nslookup google.com
;; Got SERVFAIL reply from 192.168.4.5, trying next server
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
Name:   google.com
Address: 216.58.195.78
;; Got SERVFAIL reply from 192.168.4.5, trying next server
Name:   google.com
Address: 2607:f8b0:4005:80b::200e