Teddy Hogeborn <te...@recompile.se> writes: > The host security-cdn.debian.org, used by some packages on > security.debian.org¹, despite having an IPv6 address in the DNS, can not > actually be reached from an IPv6-only host, due to issues with DNS > hosting by Fastly, the CDN provider. I raised this problem with Fastly, > first on IRC and then in their issue tracker, but their response is, as > you can see, "IPv4 is required and we have no plans to change this.".
security-cdn.debian.org is reachable from an IPv6 only host as long as that host has access to a dual stacked resolver. All real world hosts will have access to such a resolver. IPv6 only resolvers are not useful on the current Internet, and will only exist as lab experiments. Sure, it would be nice if all DNS zones where hosted on both IPv6 and IPv4 name servers. But this is not critical for IPv6 deployment, and IMHO never will be. Keeping dual stacked DNS caching resolvers around for as long as the transition will last, is not a problem. Bjørn
