[Pdns-users] strange servfail

Sun Nov 1 16:14:31 UTC 2015

Can you show your custom queries?

Aki 

On Sun, Nov 01, 2015 at 03:41:41PM +0100, Martin wrote:
> 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
> >>
> >>_______________________________________________
> >>Pdns-users mailing list
> >>Pdns-users at mailman.powerdns.com
> >>http://mailman.powerdns.com/mailman/listinfo/pdns-users
> >>
> 
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