IPv6 rDNS

Mon Nov 1 23:40:59 UTC 2010

In message <AANLkTinUMZYp9qe0i5pHYZ72aL3XyCtvaqHjzHuTkpo2 at mail.gmail.com>, Mich
el de Nostredame writes:
> On Fri, Oct 29, 2010 at 6:06 PM, Jeroen van Aart <jeroen at mompl.net> wrote:
> > I battled for a few hours getting IPv6 rDNS to work. The following tool
> > proved to be quite helpful:
> > http://www.fpsn.net/?pg=tools&tool=ipv6-inaddr
> > Just in case anyone else would run into similar problems. It's not as
> > straightforward as IPv4 rDNS.
> > Greetings,
> > Jeroen
> > --
> > http://goldmark.org/jeff/stupid-disclaimers/
> > http://linuxmafia.com/~rick/faq/plural-of-virus.html
> 
> Forgive me if this is a stupid question.
> 
> I am curious that if BIND ever tried to make the DB file easier to
> operate under pure text-based environment.
> For example, allow something like following format inside zone file,
> 
>   $ORIGIN 1.0.0.0.3.f.8.0.3.1.4.8.8.7.d.f.ip6.arpa.
>   48ff:fe35:d1bc         PTR     server.example.com.

Firstly you don't have enough bits for a IPv6 address specified and
secondly how would you distingish that from wanting the following?

48ff:fe35:d1bc.1.0.0.0.3.f.8.0.3.1.4.8.8.7.d.f.ip6.arpa. PTR server.example.com.

If you feel like writing a $6REVERSE directive please go ahead.  We
would be happy to accept such a patch.  I would however make it
take full IPv6 addresses and also take prefix syntax ((prefixlen % 4) == 0,
as only nibble boundaries make sense) and allow $ORIGIN to be specified.

e.g.
$6REVERSE fd78:8413:830:1::/64 SOA ....
$6REVERSE fd78:8413:830:1::/64 NS ....
$6REVERSE fd78:8413:830:1::/64 NS ....
$6REVERSE fd78:8413:830:1::48ff:fe35:d1bc PTR server.example.com.

$6REVERSE $ORIGIN fd78:8413:830:1::/64
@	SOA	...
@	NS	...
@	NS	...

one could make it more general and do both IPv4 and IPv6 ($REVERSE).

> And when load the zone file, automatically (internally) interpret it as
>   c.b.1.d.5.3.e.f.f.f.8.4.1.0.0.0.3.f.8.0.3.1.4.8.8.7.d.f.ip6.arpa.
> inside memory.
> 
> 
> Regards,
> --
> Michel~
> 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org