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Date: Wed, 18 Jun 2014 20:11:51 -0700
From: Darren Pilgrim <list_freebsd@bluerosetech.com>
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To: Chris H <bsd-lists@bsdforge.com>, 
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Subject: Re: 6rd and DNS (bind/nsd) on FreeBSD
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On 6/18/2014 9:36 AM, Chris H wrote:
> Greetings,
>   I manage a /29 at $home. While I manage _real_ IPv6 on many networks
> at $work. I'm stuck with 6rd at $home. I don't much care for 6rd. It's
> still pretty much 6to4. But it's all I have to work with, given the
> CPE's limitations. So, as I'm new to it, I'm not quite sure _which_
> address to advertise, and listen on, on the DNS.
> eg; I'm told I have 6 6rd addresses:
> 2602:0000:0000:0000:0000:0000:xxxx:xxxx
> or
> 2602::xxxx:xxxx
>
> but the address returned, has the IPv4 bits packed into it.
> So which of the to addresses should be advertised in the zone files.
> Should that address also be the one used to "listen" on?
>
> Apologies for seemingly such a dimwitted question. But even
> after reading RFC 5569, I'm still unclear.

FreeBSD doesn't support 6rd.  Ironically, pfSense does.