IPv6 deployment for hosting and developers

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Talk on the implications of deploying IPv6 for hosting platforms and developers.

Rough notes

Stats on incoming traffic from hosting providers
Stats on outgoing traffic from ISPs(?)
Percentage of sites running IPv6
Percentage of other services running IPv6

Problems

Adding AAAA records 'breaks' SSH.
Mail over IPv6 without SPF and DKIM stops delivery to large mail providers (e.g. Google).
If multiple protocols are available, which should be preferred? Linux seems to go for IPv6 first, but any which prefer IPv4 will never see the v6 service.

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