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

[Geert Stappers]

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.
 

> Would I be better with two unrelated DNS servers in the above
> configuration, e.g. a Google one and one from my ISP?
> 
>


Regards
Geert Stappers
-- 
Silence is hard to parse