Infrastructure
The Anatomy of DNS Zones: Roles and Functions
It’s helpful to divide DNS zones into two categories to properly understand them. The first category describes how the data is managed and replicated – the administrative role. The second category describes the direction of the lookup, or the functional role. To a DNS server, a zone is not “a domain” - it’s a boundary of authority. Continue reading ...
DNSSEC and DNS’ Fundamental Flaw
Before diving into DNSSEC (Domain Name System Security Extensions,) let’s cover the fundamental flaw in the original design of DNS: trust. DNS was built on trust, not security. DNSSEC does not encrypt DNS - it verifies it. Continue reading ...
Who Manages DNS for the Internet?
DNS is at the core of the Internet and there’s no question that it’s a service we all depend on – so who is in charge of keeping it running smoothly? Let’s work our way through the hierarchy described in my previous post to cover who’s responsible and what’s changed over the past few decades. Continue reading ...
The Origin and Evolution of DNS, the Domain Name System
To understand the Domain Name System, you need to first understand that computers are fundamentally incapable of understanding “names.” They understand numbers – specifically the binary representations of IP addresses. Continue reading ...
DNS in the Homelab
Back in March, I wrote about my DNS setup after rebuilding my BIND environment in Docker. It brought back a mix of solid lessons and a few painful ones - and I didn’t expect the flood of questions that followed. Continue reading ...