Re: [BEHAVE] input sought - PowerDNS Recursor additional Lua hooks for IPv6 DNS64 and Renumbering

On Sun, Nov 14, 2010 at 1:39 PM, bert hubert <bert.hubert@netherlabs.nl> wrote:
> Dear BEHAVE WG,
>
> I kindly request your attention for the announcement made below.
>
> It is our aim to provide a safe, working, useful and compliant
> implementation of draft-ietf-behave-dns64 in the PowerDNS Recursor.
>

Outstanding!

When i get some free cycles i will give this a try in my lab.  I am
very pleased that this will be the 4th implementation of DNS64 to
enter my lab (only counting Viagene and their multiple implementations
once).

Cameron

> A very first attempt to achieve this is described below. We've not yet gone
> over draft-ietf-behave-dns64-11 in detail to see what we are doing wrong,
> but perhaps even at this stage you may have some guidance for us.
>
> If nothing else, the PowerDNS Recursor with Lua hooks may provide an
> interesting or alternate platform for experimenting with DNS64.
>
> It is our hope that you'll be able to help us deliver DNS64 as described
> above, and any feedback you may have is more than welcome!
>
> Kind regards,
>
> Bert Hubert
> (PowerDNS)
>
> ----- Forwarded message from bert hubert <bert.hubert@netherlabs.nl> -----
>
> Date: Sun, 14 Nov 2010 22:32:31 +0100
> From: bert hubert <bert.hubert@netherlabs.nl>
> To: pdns-users@mailman.powerdns.com, pdns-announce@mailman.powerdns.com
> Subject: [Pdns-announce] PowerDNS Recursor additional Lua hooks for IPv6
>        DNS64 and Renumbering
>
> Dear PowerDNS Community,
>
> The PowerDNS Recursor is currently being extended with additional Lua hooks
> and extra infrastructure to support flexible DNS64 operations, plus perform
> on-the-fly IPv4 or IPv6 renumbering.
>
> DNS64 is described on http://tools.ietf.org/html/draft-ietf-behave-dns64-11
> and in brief:
>
>  "DNS64 is a mechanism for synthesizing AAAA records from A records.  DNS64
>   is used with an IPv6/IPv4 translator to enable client-server communication
>   between an IPv6-only client and an IPv4-only server, without requiring any
>   changes to either the IPv6 or the IPv4 node"
>
> Those of you with an interest in these features are invited to test out the
> following *pre-release*, specifically to let us know if the API is sufficient
> for your needs:
>
> http://svn.powerdns.com/snapshots/pdns-recursor-3.3-hooks.tar.bz2
>
> It can be compiled like any other PowerDNS Recursor release.
>
> New in the version are the 'nodata()' and 'postresolve()' Lua hooks. Nodata
> functions just like nxdomain(), except that it gets called when a domain
> exists, but the requested type doesn't. This is where DNS64 happens.
>
> Postresolve() is different, and very powerful - it gets handed the complete
> DNS answer as it would be sent out, ready for modification from Lua. This is
> where one might for example perform on the fly IP address renumbering.
>
> In the release you can find powerdns-example-script.lua which contains a
> working sample for both of the new hooks. This script can also be viewed on
> http://wiki.powerdns.com/trac/browser/branches/pdns-dns64/pdns/powerdns-example-script.lua
>
> Note: DO NOT TAKE THIS SCRIPT INTO PRODUCTION - it blacks out important
> sites
>
> To get going without disturbing any existing nameservers on your computer,
> compile the PowerDNS Recursor, and start like this:
>  $ ./pdns_recursor --local-address=0.0.0.0 --local-port=5300 --daemon=no
>   --socket-dir=./ --lua-dns-script=powerdns-example-script.lua
>
> Known defects are:
>        postresolve() can't yet access the original dns rcode
>        there is no way for nodata() to set the TTL to the SOA minimum value
>                as specified by draft-ietf-behave-dns64
>
> Please let us know your thoughts so we can make sure the API has everything
> needed for great DNS64 and renumbering operations!
>
> Kind regards,
>
> Bert Hubert
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>
>
> ----- End forwarded message -----
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