May 12 – 13, 2019
Shangri-La Bangkok
Asia/Bangkok timezone

Seeing the effects of DNS Flag Day in action

May 12, 2019, 4:00 PM
Ballroom 1 (Shangri-La Bangkok)

Ballroom 1

Shangri-La Bangkok

89 ซอย Wat Suan Plu - Dumex, Khwaeng Bang Rak, Khet Bang Rak, Krung Thep Maha Nakhon 10500, Thailand
Standard Presentation Public Workshop


Willem Toorop (NLnet Labs)


DNS Flag Day is a collaborative effort and agreement of DNS implementers and DNS resolver operators, in which they have committed themselves to no longer provide work-arounds for non-standard compliant authoritative nameservers as of 1 February 2019. In the run-up to DNS Flag day, and as part of the outreach, the focus for measurements was always the authoritative nameservers that needed to be fixed.

With this presentation we take the other perspective and have a look at public resolvers and resolver implementations. What was resolver behaviour on the Internet before DNS Flag Day, and how does the uptake of dropping work-arounds disseminate in the wild?

Talk Duration 15 Minutes

Primary authors

Moritz Müller (SIDN) Willem Toorop (NLnet Labs) Taejoong Chung (Rochester Institute of Technology)

Presentation materials