A DNS question re 6to6/IPv6 host IN A records.

[Jeroen Massar]

itojun@iijlab.net wrote:

> >In the forward/reverse zones on a 6to4 setup, should I have
> >nanguo          IN A                203.1.96.5
> >nanguo-v6      IN AAAA         2002:cb01:6005:2::1
> >or
> >nanguo          IN A                203.1.96.5
> >nanguo          IN AAAA         2002:cb01:6005:2::1
> >When referring to the particular host ?
> >Either works - but which is ... errr... correct?
> 
> 	i recommend the latter, definitely.  with the latter 
> you will be able o transition to IPv6 much smoother.

Definitely the latter one even with reverses.
I do usually add something like:

purgatory	A 195.64.92.136
purgatory	AAAA 3ffe:8114:2000:240:290:27ff:fe24:c19f
purgatory.ipv4	A 195.64.92.136
purgatory.ipv6	AAAA 3ffe:8114:2000:240:290:27ff:fe24:c19f

Reason: some programs can't be told to only use IPv6 or only IPv4
(usually -6 or -4 option).
This way one can 'force' it to use either transport.
I do usually leave out the ipv4 though as I don't use that much any more
anyways ;)

Greets,
 Jeroen