The Internet, and how it's made.
When IRC (try dict IRC) was hip. And people used mirc32 and some wrote, pressing "alt-f4" starts a hidden flightsimulator.
Yes you could simply get a zone transfer, dig them out and put them here, for the fun.
DNS was created 1983, before there was the hosts file, yes /etc/hosts.
CEO short summary, try dict DNS and read the RFC. The important RRs are SOA, NS, MX, and the whois database.
https://salsa.debian.org/dsa-team/mirror/domains
- If you have MX records for a domain and you don't deliver mails to it, it is broken.
- If you have the choice of a TLD .edu or some country specific .xy the .edu one is better and should be used, anything else is poor decision.
So why we create tools to setup your own DNS server? Map your network? Because the given DNS servers are unreliable. Because there is no network documentation. Because...
So where to start, how to get an overview? . Once it works quite good and is fast, the plan is to also make appealing visualisations of it, and then have it via https://github.com/alexmyczko/ruptime
"secure by default is only good for good press - that way clueless users get 'secure' install. It's the admin that makes system secure, not having closed everything in base system - when you install debian and get only kernel+ash, it won't help anyone."