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Apple's App Store review has a hard requirement that everything works on a pure IPv6 network

The only thing that you have to do to satisfy this requirement is don’t hardcode IPv4 addresses in your app. If you are using domain names for everything then it doesn’t matter if those are only resolvable to v4 addresses.

Correct, using DNS on a IPv6 only network is enough since the point is to use DNS64/NAT64 to handle the transition until services are IPv6-native.

Please unpack this comment...

You don't necessarily need individual VMs to be IPv6 addressable to do this. That is, since our global load balancer already supports IPv6 termination, your app's API or website or whatever will be served as IPv6.

Take a look at our announcement from last week for more info: https://cloudplatform.googleblog.com/2017/09/announcing-ipv6...

Disclosure: I work on Google Cloud (so I indirectly benefit from you using our services)

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