[Dnsmasq-discuss] Rather basic question - how do you tell dnsmasq what upstream DNS servers to use?

Chris Green cl at isbd.net
Sat Oct 3 19:19:10 BST 2020


On Sat, Oct 03, 2020 at 06:06:56PM +0200, Geert Stappers wrote:
> On Sat, Oct 03, 2020 at 03:59:46PM +0100, Chris Green wrote:
> > I'm feeling really silly, I've been using dnsmasq for several years
> > running it on a dedicated Raspberry Pi on the LAN to provide local DNS.
> > 
> > It's been working perfectly OK but just a very short while ago the
> > Google DNS server at 8.8.8.8 went down for a while and it's what I
> > (appear to) use as the upstream DNS.
> > 
> > How and where does one set dnsmasq's upstream DNS? Is it the following
> > line in /etc/dhcpcd.conf :-
> > 
> >     /etc/dhcpcd.conf:static domain_name_servers=192.168.1.4 8.8.8.8 fd51:42f8:caae:d92e::1
> > 
> > The file /run/dnsmasq/resolv.conf appears to be derived directly from
> > the above:-
> > 
> >     chris at newdns$ more resolv.conf
> >     # Generated by resolvconf
> >     nameserver 192.168.1.4
> >     nameserver 8.8.4.4
> >     nameserver fd51:42f8:caae:d92e::1
> > 
> > The Raspberry Pi running dnsmasq is 192.168.1.4 on the LAN here, I'm
> > running dnsmasq version 2.76.
> 
> Snippet from the dnsmasq manual page:
> 
>        -S, --local,
>        --server=[/[<domain>]/[domain/]][<ipaddr>[#<port>][@<source-ip>|<interface>[#<port>]]
>                      Specify  IP  address  of  upstream  servers
> 		     directly. Setting this flag does not suppress
> 		     reading of /etc/resolv.conf, use --no-resolv to do that.
>  
Yes, but do I want it to ignore /etc/resolv.conf (well, actually,
/var/run/dnsmasq/resolv.conf) ?  Do I want resolvconf to handle which
DNS servers are used or am I better turning resolvconf off altogether?

-- 
Chris Green



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