Custom Local DNS with Ubuntu Clients

[Tom H]

On Sun, Mar 11, 2018 at 8:30 PM, Tom H <tomh0665 at gmail.com> wrote:
> On Sun, Mar 11, 2018 at 2:34 PM, Aero Maxx <aero.maxx.d at gmail.com> wrote:
>> On 11 March 2018 at 17:33, Tom H <tomh0665 at gmail.com> wrote:
>
>
>>> What is the app that's managing the network? NM? ifupdown?
>>> systemd-networkd?
>
>> I'm unsure, I'm using the default install of Ubuntu Desktop 16.04 LTS
>
> NM.
>
>
>>> Is resolvconf or systemd-resolved involved in setting up
>>> "/etc/resolv.conf"?
>
>> I believe it is resolvconf as this is installed by default.
>
> OK.
>
>
>>> What's the output of "ls -l /etc/resolv.conf" and "cat /etc/resolv.conf"?
>
>> root at ubuntu:~# ls -l /etc/resolv.conf
>> lrwxrwxrwx 1 root root 29 Mar 10 13:53 /etc/resolv.conf ->
>> ../run/resolvconf/resolv.conf
>
>> root at ubuntu:~# cat /etc/resolv.conf
>> # Dynamic resolv.conf(5) file for glibc resolver(3) generated by
>> # resolvconf(8)
>> #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
>> nameserver 127.0.1.1
>
> So you have both resolvconf and dnsmasq running (IIRC, the Ubuntu default,
> as you say above).
>
> AFAIK, you can drop a file into "/etc/dnsmasq.d/" with
> "server=nameserver_ip_address" to ensure that dnsmasq forwards queries to
> it.

OOPS!

If you only have dnsmasq-base installed (which, AFAIR, is the
default), you have to use "/etc/NetworkManager/dnsmasq.d/" not
"/etc/dnsmasq.d/".