[Pdns-users] Ddns with powerdns

[Ruben d'Arco]

On Tue, Apr 16, 2013 at 02:57:41PM +0200, Stefan Schmidt wrote:
> On Tue, Apr 16, 2013 at 1:09 PM, Blason rock <blason16 at gmail.com> wrote:
> 
> > Hi folks,
> >
> 
> Hello there,
> 
> > I m planning to setup ddns server for my organization. We are specifically
> > setting this up for dvrs. Initially we used dyn dns but company is thinking
> > of putting up their own ddns server in the datacentre.
> >
> > Can somone point me for good write up about implementing ddns with pdns?
> > And first of all is ddns possible with pdns.
> >
> Well first things first: Yes it is entirely possible to achieve a
> dyndns-style DNS Update Service with PowerDNS Server.
> As for the dynamic dns update protocol (
> http://en.wikipedia.org/wiki/Dynamic_DNS#RFC_2136_dynamic_DNS_update ) this
> is not supported by pdns.

Allthough not in the main powerdns branch, there is this:
https://github.com/cyclops1982/powerdns/tree/rfc2136
It's a implementation for rfc2136 for powerdns. It's lacking some feedback, so please test and report!
Also, it does clean cache afterwords so that's not a problem like listed below.

> Secondly however i fear there is not much official documentation other than
> the following:
> http://wiki.powerdns.com/trac/ticket/524
> and documentation of such implementations although quite common according
> to what i've heard on the web are scarce.
> If you have done a bit of web programming however chances are that you
> already know how to update a mysql database using a cgi (probably php)
> script and do basic authentication before accepting anything from a
> webclient.
> Thats actually all you would need to update the IP address of an IN A
> record in PowerDNS Server if you're using the gmysql backend.
> http://doc.powerdns.com/html/generic-mypgsql-backends.html#idp9030464 gives
> you indepth information on what PowerDNS asks the DB about and what the
> table structure looks like.
> 
> For the change to be propagated immediately however you would have to
> disable the caching PowerDNS deploys to prevent charging all it's query
> load to the database. (
> http://doc.powerdns.com/html/all-settings.htmlcache-ttl,
> query-cache-ttl ).
> 
>  Stefan

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