We’re seeing a temporary upstream issue in Docker’s package repository where the containerd.io package referenced by apt is unavailable (404). This can cause new installations of our resolver stack to fail when installing Docker (and may also affect apt upgrade on hosts using Docker’s apt repo).

We’re monitoring the upstream fix and will remove this notice once resolved.

In the last 24hours we have seen issues with domains that have CNAME entries pointing to Azure Front Door.

Clearing the cache on your resolver will clear the stale entries and allow for new ones to be fetched, resolving issues with popular websites not opening for end users.

To perform a cache clear, head to Admin Portal, then Resolvers tab and click on the 3 dots next to your resolver and select “Clear resolver cache”.