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A comment on More than 1/3 of all access to Google is now over IPv6.

Re:More than 1/3 of all access to Google is now over IPv6 by MayeulC on Wednesday August 05, 2020 @09:16AM (#24060429)
I host some services at home, mainly targeted at friends and family.

Some are IPv6-only, because it's much easier to manage from my side. I whish I could add an A record for these that pointed to a reserved IP address that would inform clients the service is IPv6-only.

For now, I just don't put any, and browsers just display a generic error. Since some DNS don't answer with IPv6 addresses, the browser couldn't even provide a meaningful error message if it tried to.

Would that be worth an RFC? What IP address should be used?

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Re:More than 1/3 of all access to Google is now over IPv6 by dxld on Wednesday August 05, 2020 @11:00AM (#24061540)
You might be interested in this service: https://no-ipv4-here.ungleich.ch/
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Re:More than 1/3 of all access to Google is now over IPv6 by MayeulC on Sunday August 09, 2020 @02:50PM (#24101875)
Ah, thank you, that's quite close to what I wanted. Ideally, it would be ran by a CA to work flawlessly with web browsers.

Even better if web browsers could display a message of their own, recognizing this IP address.

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Re:More than 1/3 of all access to Google is now over IPv6 by growse on Wednesday August 05, 2020 @09:19AM (#24060448)
Isn't the presence of an AAAA record but the lack of an A record already a sufficient indicator that the service is IPv6 only?
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Re:More than 1/3 of all access to Google is now over IPv6 by MayeulC on Wednesday August 05, 2020 @10:03AM (#24060840)
It should, but:

* I don't know any browser or app that display a special, informative message in that specific case.

* You need a DNS server that answers AAAA record to detect this. Some ISPs do not provide IPv6 connectivity, nor do their DNS servers provide AAAA records. In most places I know, especially when talking about individuals, people use their ISP-provided DNS servers.

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Re:More than 1/3 of all access to Google is now over IPv6 by Decade on Wednesday August 05, 2020 @09:01PM (#24067235)
For web services, one sad way to handle it is to proxy through Cloudflare. IPv4, IPv6, DNSSEC, TLS at the cost of selling your users out to a budding monopoly.
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