[Dnsmasq-discuss] What's the "right" way to specify upstream servers?

Matus UHLAR - fantomas uhlar at fantomas.sk
Sun Sep 5 11:51:22 UTC 2021

>> On 03.09.21 17:13, Chris Green wrote:
>> > I know there probably isn't a "right" way to do this but, while I've
>> > been trying to sort out how to make my dns/dhcp more resilient, I have
>> > looked at my existing dnsmasq running on a Pi and it looks a bit odd
>> > to me.
>> >
>> > It's a pretty standard, off the shelf Raspberry Pi installation using
>> > the Lite version as it's headless.  The dnsmasq.conf file has been
>> > changed quite a lot over the years though and I wonder if it's still
>> > optimal.
>> >
>> > The upstream servers *seem* to be specified in /etc/dhcpcd.conf as
>> > follows:-
>> >
>> >    # Example static IP configuration:
>> >    interface eth0
>> >    static ip_address=
>> >    #static ip6_address=fd51:42f8:caae:d92e::ff/64
>> >    static routers=
>> >    static domain_name_servers=

>On Sat, Sep 04, 2021 at 04:33:10PM +0200, Matus UHLAR - fantomas via Dnsmasq-discuss wrote:
>> this is dhcp client configuration, not dhcp server.
>> iiuc it tells dhcp client not to use IP address, default route nor servers
>> that DHCP server provided.

On 04.09.21 17:52, Chris Green wrote:
>This *is* the DHCP server for my LAN so these are the upstream DNS
>servers it gives to its clients.

- why do you run a DHCP client on a DHCP server then?
- Especially when you configured it statically and not to use DHCP settings?

note that this is dnsmasq list, not dhcpcd.

>> I really wonder why you run dhcp client in this case.
>> > /etc/resolv.conf is:-
>> >
>> >    # Generated by resolvconf
>> >    nameserver
>> this means local clients query something running on localhost, apparently
>> dnsmasq.
>> > So, is the above OK?  Is it the "right" way to do it?  ....etc.
>> I recomment using nameservers the DHCP server provided, not override it
>> unless you really know why.

>As I said this *is* the DHCP server.

I don't see you mentioned this in your former e-mail.

>> I don't see dnsmasq configuration here.
>> I assume it's configured but I am not familiar to raspberry configuration...

>Exactly my problem!  It's an 'out of the box' installation of dnsmasq
>on a Raspberry Pi that I have changed to static IP so that it can act
>as my local DNS/DHCP server.

well, I again don't see if or how you configured your dnsmasq, and since I
don't own RPI, I don't know if or how is it configured by default.

Perhaps you could ask in RPI forum / mailing list?
(they should know the above)

or show us how does your dnsmasq.conf look like?

Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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