Subj : ipv6 resolvability
To   : Floris van Unen
From : Michiel van der Vlist
Date : Wed Nov 13 2024 01:39 pm

Hello Floris,

On Wednesday November 13 2024 13:20, you wrote to All:

 FU> with help of https://internet.nl/site/fido.unen.net/3038781/ i found
 FU> out that none of my nameservers supported ipv6 so i added ipv6 AAAA
 FU> records for the nameservers and updated the glue records and now it's
 FU> better.

Great!

So what do http://test-ipv6.com and https://ipv6-test.com say?

 FU> So does a recursive DNS query fallback into ipv4 if none of the
 FU> nameservers for a domain have an ipv6 address? Because people could
 FU> still find my ipv6 AAAA record on my ipv4-only nameservers...

Don't confuse the accesability with the content of name servers. Most name servers that are accesible by IPv4 only do respond with an AAAA record when that is present for the requested host.

But of course we should all prepare to function in an IPv6 only environment, so the use of name servers that are accesable via IPv6 is much preferred.


Cheers, Michiel

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