Feb 4 – 5, 2021
UTC timezone
Webinar doors will open at 15:45 UTC. The first session will start promptly at 16:00 UTC.

Charter Communications Public DoH Trial - Lessons Learned

Feb 4, 2021, 7:00 PM
Standard Presentation Online Workshop OARC 34 Day 1


Mr Jason Weil (Charter Communications)Mr Todd Medbury (Charter Communications)


DNS over HTTPS is a new update to the venerable DNS protocol that provides security and privacy enhancements for Internet users by encrypting the communication channel between the DNS client on a device and the network DNS resolver. Charter launched a public DoH Trial in Q4 of 2020. Charter was also added as a participant in Google Chrome’s DoH experiment based on the SPAU (same provider auto-upgrade) model with the Chrome 87 deployment. Any Charter Chrome user with Charter’s Do53 public IPv4 or IPv6 server addresses are automatically upgraded to the DoH trial resolvers. This Trial resulted in valuable results that will be useful for other providers of DNS services interested in deploying DoH at scale. This presentation will cover some of the insights learned as part of the Charter DoH Trial including:
· The quest for Load! - 100k QPS and beyond
· Comparison of traffic utilization between DoH and Do53
· Comparison of server resource utilization between DoH and Do53
· DNS provider configuration Best Practices
· Server optimizations for a DoH platform
· Future areas of interest

Primary authors

Mr Jason Weil (Charter Communications) Mr Todd Medbury (Charter Communications)


Mr Ricardo Meleschi (Charter Communications)

Presentation materials