Is it possible to deploy my own DNS over HTTPS server and will it work if DNS is disabled in the country?

Question

Domain Name System

Or is it possible to locally write down the IP addresses of popular sites, for example, that Yandex, and go by IP in such a situation ?? For example, contact Yandex by IP 77.88.21.3

Answer 1

I don’t quite understand - where are you going to deploy it? On "this" side of the barrier or on "that"?
If "this" - it will not help you - the traffic will go through a certain set of cross-border nodes, on which it will be controlled only by the white list.
If on "that" - you simply won't be able to get through to him :)

Answer 2

The host file or your dns server, you can even raise a local one. There you can do whatever you want.
But if dns stops working in the country, I'm afraid your crutches won't help you, A LOT of things are tied to it.

Answer 3

Can.
Your own DNS-over-HTTPS server based on the H2O web server
But you must understand that only DoH-supporting software will work with it. Today it is, in fact, only Firefox.
Where as the best option would be to raise a local resolver with forwarding via DNS-over-TLS from non-requests to another one located outside the borders of highly spiritual states.

Answer 4

Disable DNS in country = Disable internet in the country altogether.
Nobody plans to turn it off completely, on the contrary, they are trying to create a backup infrastructure that will ensure the operation of the Runet in the event of its forced isolation "from the outside."
Another thing is that, including through the substitution of DNS queries, they are trying to organize Internet censorship. This is where DNS over HTTPS can come in handy, but this is not accurate. Depends on the setting of the blocking equipment on the provider's side. For example, activating DNS over HTTPS in my browser did not bring the expected result. But the good old VPN "out" perfectly suppresses any attempts of surveillance and censorship.