[colug-432] DNS Amplification Attack

[Rob Funk]

Aren't DNS amplification attacks possible as long as well-known open DNS 
servers exist, such as those maintained by Google (8.8.[48].[48]) and 
Level3 (4.2.2.[1-6]), or even OpenDNS? Or do they somehow prevent the 
problem while still remaining open?


Relevant information about such servers:
  http://pcsupport.about.com/od/tipstricks/a/free-public-dns-servers.htm
  https://developers.google.com/speed/public-dns/
  http://www.tummy.com/articles/famous-dns-server/