B-Root has begun support for DNS-over-TLS (DoT) on port 853 on an experimental basis. Our goal is to allow researchers and operators to test support for DoT to an authoritative DNS root server. We plan to work with the DNS community to determine whether or not DoT to the Root Server System is a useful addition. Please reach out to us by e-mail to b-poc@isi.edu with any feedback or questions.

Note: Our support for DoT is not a permanent commitment at this time, and we may withdraw support for DoT support at any time. Operational support for UDP and TCP will be prioritized over support for DoT.

We would like to thank our collaborators at Google for the initial testing of our DoT support under a joint project.