Real DNS incidents: broken delegation, missing glue, failed migration, DNSSEC SERVFAIL

1 h 10 min Debian 12 Versions BIND 9.16+, Unbound 1.16+

Objective

Recognize within minutes the DNS outages that keep coming back in production, prove them with the right command and fix them without causing a new one. Every incident in this lesson has been lived, in one form or another, by operations teams of all sizes.

This lesson is part of the full course

Unlock Production DNS with BIND 9 and Unbound to read every lesson, do the exercises, access the simulations and earn your certificate.

Buy — $19 All-access pass — $99

Already enrolled? Log in.