[Pdns-users] Problem with powerdns(master) -> bind(slave)

Kenneth Marshall ktm at rice.edu
Mon Jan 21 17:29:00 UTC 2008


First, I would recommend using 2.9.21 instead of 2.9.20 because
of a resource problem with TCP connections that causes zone transfers
to fail. Restarting the pdns server will get it working again. Second,
PowerDNS assumes that all information in the DB backend is correct
per the RFC and it just presents it to the world. If your data is
bogus, then when Bind DNS attempts to perform a zone transfer, it will
fail because of the checking performed. Typical bad data is having
another record for lookup with the same key as a CNAME record. The
RFC says that a CNAME record must be unique. Other items that have
bit us are keys that are not the FQDN or that are empty. We have
added triggers to prevent the insertion of this bogus data and our
zone transfers have not had any problems.

Good luck cleaning your data and removing the ability to add bogus
data in the future.


On Mon, Jan 21, 2008 at 06:00:30PM +0200, Anton - Valqk wrote:
> Hello there to everyone!
> I'm having a hard time using bind as slave along with my master powerdns
> 2.9.20 compiled from freebsd ports.
> I use postgresql backend and want to have a slave that do not needs the
> postgres database to be up and running,
> that's why I've setuped the common bind 9.3.3 that comes with freebsd as
> a slave one.
> Everything worked fine until a client of mine didn't requested a CNAME
> record... ok I said and did it.
> Few days later I saw that my bind has stopped updating the domain that
> I've inserted the cname for.
> here is a record for the cname in db:
> id | domain_id | name | type | content | ttl   | prio | change_date |
> clients_id
>  2767 |  45 | www.f-utils.org | CNAME | sitekreator.bg. | 600 | 0 | 
> 1194444091 | 227
> the powerdns itself works just fine, but here is what I'm getting at the
> bind ns:
> Dec  29 11:29:54 ns1 named[84184]: transfer of 'f-utils.org/IN' from
> XXX.XXX.XXX.XXX#53: failed while receiving responses: CNAME and other data
> and the domain is not updated ad the bind end.
> is this a known bug?
> what whould you recomend?
> Another thing is that I wasn't able to setup a slave that automatically
> adds a domain name to the list with domains when the master reqest to
> sync it. is this possible so I don't add the domains by hand/script like
> now?
> I'm posting to the both lists (powerdns and bind), hope someone's able
> to help!
> Cheers,
> valqk.
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