Episode 181: DNS and NTP Failures — Troubleshooting Name and Time Resolution

DNS and NTP are often invisible—until they fail. This episode shows how to diagnose and fix issues with domain name resolution and time synchronization, both of which affect authentication, connectivity, and performance. You’ll learn how to use nslookup, dig, and ntpq to troubleshoot problems and interpret server behavior.

We also cover how expired DNS records, cache poisoning, NTP drift, and firewall blocks can wreak havoc silently. Fixing these problems requires awareness of both the protocol and the environment. This episode ensures you can spot and resolve these hidden causes of major disruptions.