[Samba] samba_dnsupdate

[Rowland penny]

On 02/03/2020 13:36, Paul Littlefield wrote:
> On 02/03/2020 13:16, Rowland Penny via samba wrote:
>>
>> Samba runs samba_dnsupgrade on a regular basis, using dns_update_list 
>> as a template. Amongst the list of dns entries is this:
>>
>> AAAA ${HOSTNAME}                                           $IP
>>
>
> Hi Rowland,
>
> Can I change any of these which will not break my AD DC?
You could try commenting out the line in dns_update_list.
> dns update command = /usr/sbin/samba_dnsupdate
Write another script that does nothing and use that instead (just for 
testing) ?
>
> OK, so is it safe to (maybe at a future date) turn off IPv6 on Ubuntu 
> and change to ifupdown if I want to?
Yes, this is what I did when testing Ubuntu 18.04, but perhaps Louis has 
further comments ?
>
> 13:25:35.264891 IP 130.130.0.252.63006 > 130.130.0.218.53: 29782 
> update [1a] [3n] SOA? mydomain.com. (108)
> 13:25:35.265196 IP 130.130.0.218.53 > 130.130.0.252.63006: 29782 
> update Refused- 1/3/0 (Class 254) CNAME V-RDS02.mydomain.com. (108)
> 13:25:35.274443 IP 130.130.0.252.55001 > 130.130.0.218.53: 64781 
> update [1a] [3n] [1au] SOA? mydomain.com. (239)
> 13:25:35.354349 IP 130.130.0.218.53 > 130.130.0.252.55001: 64781 
> update 1/3/1 (Class 254) CNAME V-RDS02.mydomain.com. (224)
>
> ...what IS that Windows server trying to do?!
It looks like it is trying to update its own dns records and if you are 
using dhcp to update the records in AD they shouldn't be.

Rowland