News for hackers. Stuff that matters.

A comment on IAB Statement on IPv6. Parent comment

Re:IAB Statement on IPv6 by lokedhs on Tuesday November 08, 2016 @04:35AM (#12898864)
That site correctly lists apple.com as not supporting IPv6. The funny thing is that www.apple.com does support it.
[ Parent | on HN ]
Re:IAB Statement on IPv6 by vetinari on Tuesday November 08, 2016 @04:53AM (#12898932)
Same with microsoft.com.
[ Parent | on HN ]
Re:IAB Statement on IPv6 by ohitsdom on Tuesday November 08, 2016 @07:25AM (#12899643)
How is this the case?
[ Parent | on HN ]
Re:IAB Statement on IPv6 by fps on Tuesday November 08, 2016 @08:31AM (#12900035)
Both Microsoft and Apple's www sites use Akamai's CDN, via a cname to a CNAME to something in akamaiedge.net, which support ipv6. The apex record of a domain (that is, the root record, microsoft.com or apple.com) cannot be a CNAME, it can only have an A, NS, MX or TXT record. A records make dynamic infrastructure hard, because they require API coordination between your DNS provider and your CDN. So Microsoft and apple host their own apex domain records via A records to static IPs in their own IP blocks, and have these servers issue a permanent http redirect to www.
[ Parent | on HN ]