November 8th & 9th, 2024
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This video is hosted on YouTube.


Introductory DNS

SeaGL 2014

This talk will begin with a very general introduction to DNS, covering:

  • What DNS is
  • Why it is important
  • How a catastrophic world war might start if it failed
  • Who ‘the 13’ are.

After introducing some of the basic record types (A,AAAA,CNAME,MX,NS,SOA), I will present an examination of recursive DNS resolution, including walking through manual examples of different DNS queries. This section will include a discussion of authoritative vs nonauthoritative DNS servers. From this point, if there is time, some other topics that could be covered are:

  • DNS hijacking and running your own recursive resolver to avoid this
  • More advanced DNS records
  • Why CNAME records can cause lots of problems if they are used incorrectly.
  • DNS cache poisoning


Jordan Evans

Jordan Evans