Hey guys, I recently bought an orange pi zero 2 and, as the title suggests, I want to put an ad blocker on it. Those are the options. I also will put openvpn for external connection to my network. Does anyone have experience with them? What would you suggest?
AFAIK, instead of forwarding your DNS requests to an upstream DNS provider (eg. 1.1.1.1), it resolves the domain step by step. First, it asks the root nameserver “where’s org.?”, the returned server is asked “where’s example.org.?”, the returned server is asked “where’s www.example.org.?” and so on until you get your target IP.
See also https://en.wikipedia.org/wiki/Domain_Name_System#Address_resolution_mechanism
Edit: there is also a good explaination on https://docs.pi-hole.net/guides/dns/unbound/#what-does-this-guide-provide