Gnoppix Offers Free and Secure Browsing
Gnoppix provides a free public service called DNS over HTTPS (DoH) which helps keep your browsing private and secure. Think of it like scrambling your online conversations so no one can eavesdrop.
Gnoppix used to have more servers available for this service, but due to unforeseen circumstances, they had to reduce the number. However, you can still and always access the DoH server at: https://doh.gnoppix.org
Using Gnoppix DoH
The good news is that if you use Gnoppix Linux, you already have this secure browsing feature enabled by default. (starting Gnoppix 24.8) There's no need for you to do anything extra. Secure by default!
Important Note: Using DoH with Other Operating Systems
If you use a different operating system (like Windows or Mac), Gnoppix currently only recommends using DoH through the Firefox web browser. I’ve just no manpower to support for setting up DoH on other browsers and other OS at this time.
Make sure DoH is active and running:
1.) type about:config
2.) type network.trr
3.) make sure https://doh.gnoppix.org is in
4.) make sure it is set to 3
'3' means only open website with doh enables (always secure)
anything other should not be defined 
for info 2 means 1st. use DOH if doh is not reachable (server down) use ‘normal’ DNS.