Yeah only use doh on router, expect per device security otherwise.

I don’t use nextdns so I don’t know. Some mullvad stuff (like their http proxy!) is only functional when you’re using their vpn, but the doh server works fine without it.

DNS over https makes a connection with the dns server using the encrypted https protocol. That means that when I want to go to hanksbuttplugemoprium.com my isp doesn’t see the request because it’s encrypted. Normally those requests get passed up the chain in plaintext and that’s a Big Problem.

Like I said, I don’t know about nextdns, but it seems like it’s built around using dns level blocking.

The problem with blocking stuff through dns at the router level (like pihole and nextdns and if you’re not careful with what you choose, mullvads doh) is that you might end up stopping normal legitimate internet use. I stopped using pihole and later uhh the one with home in the name for that reason. Shit didn’t work and people wouldn’t tell me when it happened so I couldn’t whitelist stuff.

If you’re worried about your isp seeing dns requests and cataloging them, selling them or just blocking them and reporting you to the authorities, set up dns over https at the router level.

What are you trying to accomplish?