DNS: The Most Important Service You Don’t Think About
If there’s one service that quietly makes or breaks an IT environment, it’s DNS . It’s the first thing users blame on “the Wi‑Fi,” the last thing junior techs check, and the root cause of more “mystery issues” than almost anything else in infrastructure. So, for the first entry in this rebooted newsletter, let’s get back to basics and back to best practices. Why DNS Matters More Than You Think DNS is the phonebook of your environment. If it’s slow, wrong, or misconfigured: Logins fail Apps time out Group Policy doesn’t apply Cloud services break Users swear the network is down And the worst part? Everything looks fine until you dig deeper. Everyday Best Practices for DNS 1. Always Use Internal DNS for Domain‑Joined Devices This is the #1 mistake in small and mid‑sized environments. If a domain‑joined machine uses Google DNS (8.8.8.8) or Cloudflare (1.1.1.1), expect: Slow logins Broken GPO Random authentication failures Azure AD / Entra ID sync issues Fix: Internal DNS → Forwar...