[PLUG] trying to lock down DNS addresses problem

[Russell Senior]

https://support.mozilla.org/en-US/kb/dns-over-https-doh-faqs

On Fri, Jan 13, 2023 at 1:05 AM Russell Senior <russell at personaltelco.net>
wrote:

> Because I don't have the router you have, I am lacking any particular
> insight into what it is doing, so anything I suggest is pure guesswork.
> Vendor firmware on commercial off the shelf routers is quite varied and
> sometimes bordering on arbitrary in how they choose to behave.
>
> One other thing to be aware of, some browsers (including Firefox) are
> doing DNS over HTTPS (or similar) by default these days. You can check the
> setting in General / Network Settings / Enable DNS over HTTPS, and the
> associated destination. Mine defaults to Cloudflare. I generally don't use
> other browsers, but others may be doing something similar. You can, of
> course, choose a different DNS over HTTPS provider, or you can turn it off
> in Firefox's Settings. Further research into this behavior and its nuances
> might be needed.
>
> --
> Russell Senior
> russell at personaltelco.net
>
> On Thu, Jan 12, 2023 at 5:55 PM American Citizen <
> website.reader3 at gmail.com> wrote:
>
>> Hello all:
>>
>> I am currently hitting an unusual problem with two DNS addresses which I
>> have set up in both the NetGear C6300v2 cable modem/router which has the
>> option to manually set the DNS addresses (which I did) and with the
>> openSuse Linux Leap 15.4 OS using NetManager, which has the option to
>> set the DNS addresses in the configured connection. (and I did manually
>> configure them too) .
>>
>> I am expecting to see DNS addresses 208.67.220.220 and 208.67.222.222
>> when landing on either the https://www.dnsleaktest.com/ website or the
>> https://surfshark.com/dns-leak-test website, but to my surprise both
>> sites keep coming up with two Cloudflare DNS addresses
>>
>> IP      Hostname        ISP     Country
>> 108.162.218.150         None    Cloudflare      Newark, United States
>> 108.162.218.190         None    Cloudflare      Newark, United States
>>
>> I am concerned about this, as I do NOT want cloudflare doing the DNS
>> lookups, I expected ExpressVPN DNS numbers to show up.
>>
>> Any ideas on how to fix this problem?
>>
>> Randall
>>
>>