[BEHAVE] input sought - PowerDNS Recursor additional Lua hooks for IPv6 DNS64 and Renumbering
bert hubert <bert.hubert@netherlabs.nl> Sun, 14 November 2010 21:40 UTC
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Date: Sun, 14 Nov 2010 22:39:38 +0100
From: bert hubert <bert.hubert@netherlabs.nl>
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Subject: [BEHAVE] input sought - PowerDNS Recursor additional Lua hooks for IPv6 DNS64 and Renumbering
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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. 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 _______________________________________________ Pdns-announce mailing list Pdns-announce@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-announce ----- End forwarded message -----
- [BEHAVE] input sought - PowerDNS Recursor additio… bert hubert
- Re: [BEHAVE] input sought - PowerDNS Recursor add… Cameron Byrne