September 29, 2017 to October 3, 2017
Fairmont San Jose
US/Pacific timezone

Persistent DNS ‘sessions’ - where next?

Sep 29, 2017, 5:00 PM
Regency 2 Ballroom (Fairmont San Jose)

Regency 2 Ballroom

Fairmont San Jose

170 S Market Street, San Jose, 95113, CA, USA
Standard Presentation Public Workshop Public Workshop


Dr Sara Dickinson (Sinodun IT)


Recent years have seen significant changes in the standards for DNS-over-TCP, a new EDNS0 Keepalive option, a new standard for DNS-over-TLS and a new Internet Draft proposing ‘DNS Session Signalling’. The latter specifies a completely new mechanism to manage persistent DNS sessions which has already been utilised for DNS Service Discovery to introduce novel ways to propagate DNS data e.g. server initiated PUSH messages. In addition to this, recent DDoS attacks have operators thinking more carefully about how they can protect services for customers in such circumstances, for example by using dedicated sessions for ‘top-talking’ customers. This talk will take a tour of the evolution of doing DNS over session based protocols and focus in depth on the potential new use cases that DNS Session signalling opens up. It will try to enumerate the trade-offs encountered when using DNS sessions and summarise some of the recent research on the operational costs of doing so.
Talk Duration 30 Minutes

Primary author

Dr Sara Dickinson (Sinodun IT)

Presentation materials