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Webinar ‘How to create and test your DNS-over-TLS and DNS-over-HTTPS (DoT/DoH) resolver’

Home > Observatory and resources > News > Webinar ‘How to create and test your DNS-over-TLS and DNS-over-HTTPS (DoT/DoH) resolver’

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The webinar will take place online on 26 October 2020 from 14:00 to 15:30 and will be run in French by Alexandre Pion, R&D engineer and Stéphane Bortzmeyer expert R&D engineer. It will be divided into 3 sections:

  • 1. ‘Background and feedback on the latest DoT/DoH news’: overview of the latest developments and news regarding the security of the DNS protocol
  • 2. ‘Create your own resolver’: step-by-step tutorial to implement and configure your own resolver and enable it using DoT and DoH protocols
  • 3. ‘Test a resolver with Homer’: sharing session on examples to test your resolver using the ‘Homer*’ tool developed by Afnic.

Each section will be followed by discussions and a Q&A session.

This workshop requires technical knowledge of the DNS protocol and system administration (installation and configuration of applications/services).

All of the resources presented during this webinar will be made available (webinar video, step-by-step tutorial and Homer client).

How to create and test your DNS-over-TLS and DNS-over-HTTPS (DoT/DoH) resolver

(In French)

26 October – 14:00 to 15:30 CET (Paris time, UTC +2)



*With the deployment of public DoH and DoT resolvers and the implementation of clients in operating systems and applications like Web browsers, we have chosen to equip ourselves and provide our community with an easy-to-use command-line client for DoT and DoH requests. Homer is also designed to check if a DoT or DoH resolver is RFC compliant (RFC 7858 for DoT and RFC 8484 for DoH).

About Afnic

Afnic is the acronym for Association Française pour le Nommage Internet en Coopération, the French Network Information Centre. The registry has been appointed by the French government to manage domain names under the .fr Top Level Domain. Afnic also manages the .re (Reunion Island), .pm (Saint-Pierre and Miquelon), .tf (French Southern and Antarctic Territories), .wf (Wallis and Futuna) and .yt (Mayotte) French Overseas TLDs.

In addition to managing French TLDs, Afnic’s role is part of a wider public interest mission, which is to contribute on a daily basis, thanks to the efforts of its teams and its members, to a secure and stable internet, open to innovation and in which the French internet community plays a leading role. As part of that mission, Afnic, a non-profit organization, has committed to devoting 11% of its Revenues from managing .fr Top Level Domain to actions of general interest, in particular by transferring €1.3 million each year to the Afnic Foundation for Digital Solidarity.
Afnic is also the back-end registry for the companies as well as local and regional authorities that have chosen to have their own TLD, such as .paris, .bzh, .alsace, .corsica, .mma, .ovh, .leclerc and .sncf.

Established in 1997 and based in Saint-Quentin-en-Yvelines, Afnic currently has nearly 90 employees.