[Pdns-users] strange servfail

Sun Nov 1 14:41:41 UTC 2015

Yes, but I have checked and double checked all custom queries, and all 
fields in the SELECT clauses are in the correct order (correct = order 
of fields as in the Powerdns source code queries). I have no idea where 
that malformed type is coming from. When I disable the backend with the 
custom queries everything is ok with this domain, but like I said, I 
cannot figure out why Powerdns does what it does when both backends are 
active.

Martijn

On 30-10-2015 17:41, Aki Tuomi wrote:
> That, again, means that you have dns name in type column.
> 
> On Thu, Oct 29, 2015 at 09:32:48PM +0100, Martin wrote:
>> No, except for the aforementioned ' unknown dns type
>> 'hoofdluis.hoofdluis.nl' ' message which is probably why the queries
>> fail but I am unable to track down where this error is coming from.
>> I'm guessing Powerdns tries to build a query and decided something
>> is wrong, but since it is never actually executed in the database it
>> doesn't show up in the MySQL query logs.
>> 
>> Martijn
>> 
>> 
>> On 29-10-2015 21:22, Aki Tuomi wrote:
>> >When you get SERVFAIL, do you see anything in
>> >
>> >/var/log/syslog or /var/log/messages
>> >
>> >Aki
>> >
>> >On Thu, Oct 29, 2015 at 09:11:16PM +0100, Martin wrote:
>> >>
>> >>
>> >>Hi,
>> >>
>> >>Sure, one of the domains that is giving me trouble is hoofdluis.nl
>> >>
>> >>- dnssec is disabled for this backend in Powerdns config
>> >>
>> >>- here's a few lines from the 'records' table:
>> >>
>> >>| id | domain_id | name | type | content | ttl | prio | change_date |
>> >>disabled | ordername | auth |
>> >>+-----+-----------+------------------------+------+------------------------------------------------------------------------+-------+------+-------------+----------+-----------+------+
>> >>| 349 | 38 | hoofdluis.nl | SOA | ns1.sonexo.eu info.sonexo.nl
>> >>2015102902 10800 3600 604800 3600 | 86400 | 0 | 1446148124 | 0 |
>> >>NULL |
>> >>1 |
>> >>| 350 | 38 | hoofdluis.nl | NS | ns1.sonexo.eu | 86400 | 0 |
>> >>1446122706
>> >>| 0 | NULL | 1 |
>> >>| 351 | 38 | hoofdluis.nl | NS | ns2.sonexo.com | 86400 | 0 |
>> >>1446122706
>> >>| 0 | NULL | 1 |
>> >>| 352 | 38 | www.hoofdluis.nl | A | 185.27.174.120 | 86400 | 0 |
>> >>1446122706 | 0 | NULL | 1 |
>> >>| 353 | 38 | hoofdluis.nl | A | 185.27.174.120 | 86400 | 0 |
>> >>1446122706
>> >>| 0 | NULL | 1 |
>> >>| 355 | 38 | localhost.hoofdluis.nl | A | 127.0.0.1 | 86400 | 0 |
>> >>1446122706 | 0 | NULL | 1 |
>> >>
>> >>- root at ns1:/etc/powerdns/pdns.d# pdnssec check-zone hoofdluis.nl
>> >>Checked 12 records of 'hoofdluis.nl', 0 errors, 0 warnings.
>> >>
>> >>I should probably add that we are running two backends, both MySQL on
>> >>the same server, spread out over two different databases. One
>> >>backend is
>> >>more advanced and uses custom queries and dnssec but has no records
>> >>whatsoever for any of the domains in the second backend, and
>> >>vice versa.
>> >>Advanced backend is queried first, regular one next. It'd be easy to
>> >>point to this as the source of the problem but I cannot find any clue
>> >>that it is causing problems since MySQL queries are ok and the first
>> >>(more advanced) backend does not return any data at all for the domain
>> >>hoofdluis.nl so the second backend is definitely in control.
>> >>
>> >>Martin
>> >>
>> >>On 29-10-2015 20:39, Aki Tuomi wrote:
>> >>
>> >>> Is it possible for you to provide actual data? Also,
>> >>> - have you turned on dnssec support? gmysql-dnssec=yes
>> >>> - can you provide the actual line(s) from mysql database
>> >>> - can you run pdnssec check-zone zone
>> >>>
>> >>> Aki
>> >>>
>> >>> On Thu, Oct 29, 2015 at 08:18:29PM +0100, Martin wrote:
>> >>> Hi, Thanks for your reply. I'm using Poweradmin and everything seems to be ok in the database, no mixup of types and content or anything. I forgot to add that if I query the authoritative nameserver for the domain directly, dig works as expected: dig a abc.example.com @ns1.mynsserver gives me the expected NXDOMAIN result. I have enabled MySQL query log and it appears that some queries are fired but somehow the requesting client is unable to determine who is authoritative or something. You see, when I use nslookup in debug mode this happens: ------------ QUESTIONS: abc.example.com, type = A, class = IN ANSWERS: AUTHORITY RECORDS: ADDITIONAL RECORDS: ------------ ** server can't find abc.example.com: SERVFAIL I would expect to at least get some authority records. Again, www.example.com [1]is working fine in nslookup & dig. Martin On 29-10-2015 18:12, bert hubert wrote: Hi Martin, You appear to have put domain names in the type field! The error messages say the type is
>> >>example.example.com. Bert On Oct 29, 2015 17:10, Martin
>> >><domains at crystalline.nl> wrote: Hi, I have setup a simple MySQL
>> >>backend for a domain with a few MX records, a couple of A
>> >>records, two NS records and a SOA record for the domain. All dig
>> >>commands are run from a completely unrelated server: dig a
>> >>www.example.com [1] [1] is working: it returns the right A
>> >>record dig a example.com is working: it returns the right A
>> >>record Now this is where things go wrong: dig a abc.example.com
>> >>returns a SERVFAIL but I am expecting a NXDOMAIN response
>> >>because there is no A record for abc.example.com I checked the
>> >>PowerDNS logs and this is there: Oct 29 16:44:45 ns1
>> >>pdns[27687]: Exception building answer packet (Unknown DNS type
>> >>'example.example.com') sending out servfail Oct 29 16:44:45 ns1
>> >>pdns[27687]: Exception building answer packet (Unknown DNS type
>> >>'example.example.com') sending out servfail Oct 29 16:44:45 ns1
>> >>pdns[27687]: Exception building answer packet (Unknown DNS type
>> >>'example.example.com') sending out servfail Oct 29 16:44:45 ns1
>> >>pdns[27687]: Exception building answ
>> >> er packet (Unknown DNS type 'example.example.com') sending out
>> >>servfail
>> >>Oct 29 16:44:45 ns1 pdns[27687]: Exception building answer packet
>> >>(Unknown DNS type 'example.example.com') sending out servfail Five
>> >>messages with unknow dns type 'domain.domain.tld'. I have tried an
>> >>online tool like http://www.kloth.net/services/dig.php [3] [2] as well
>> >>and it generates the same error in the logs but only once instead of
>> >>five times. Can anyone point me in the right direction? I'm
>> >>stumped. I'm
>> >>running the latest version on Debian. Thanks, Martin Links: ------ [1]
>> >>http://www.example.com [1] [2]
>> >>http://www.kloth.net/services/dig.php [3]
>> >>
>> >>
>> >>> _______________________________________________ Pdns-users mailing list Pdns-users at mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users [2]
>> >>
>> >>
>> >>Links:
>> >>------
>> >>[1] http://www.example.com
>> >>[2] http://mailman.powerdns.com/mailman/listinfo/pdns-users
>> >>[3] http://www.kloth.net/services/dig.php
>> >
>> >>_______________________________________________
>> >>Pdns-users mailing list
>> >>Pdns-users at mailman.powerdns.com
>> >>http://mailman.powerdns.com/mailman/listinfo/pdns-users
>> 
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