6to4 in Internet aaaa records

Jeroen Massar jeroen at massar.ch
Fri Oct 3 04:47:54 CEST 2014

On 2014-10-02 22:37, Ca By wrote:
> Yes, i think .gov requires AAAA records.  So it looks like DNS admins
> are generating AAAA records that ultimately break connectivity.
> Back to my question, should there be an RFC generated that advises
> network admins to only put native natural addresses in DNS for anything
> that is supposed to be production grade and routed across the Internet?
> Meaning:
> 1.  Only make AAAA records from 2000::/3

2002::/16 (6to4) is part of that.

> 2.  Do not make AAAA records with 6to4 addresses

See http://tools.ietf.org/html/rfc6343
and of course also:
 (though that technically expired).

Except for quick tests, doing anything with 6to4 is futile.

Clearly though in this case the address never worked. Can't fix problems
between chair and keyboard with documents.

> 3.  Do no make AAAA records with NAT64 WKP 64:ff9b::/96 ( saw this last
> week )

One can stuff whatever one wants in DNS, if it breaks though that is the
problem of the operator.


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