Brussels / 3 & 4 February 2018


Blame (and) DNS: debugging tutorial

Find out who, where, and how broke your DNS.

How to find out who, where, and how broke your DNS resolution? What support line to call?

These are hard questions because today's DNS is very complex and even simplest query for an IP address might involve dozen different parties. In this tutorial we will walk though typical scenarios and use common tools to find out why things do not work as we expect and who to contact.

Format of the talk is presentation with screencast from live debugging sessions. Attendees are encouraged to bring own laptops with working network, pre-installed command-line tools dig, delv, drill, ping, and a web browser. This might be handy if you want to play with the tools during the talk.


Petr Špaček