[Pdns-users] ldap & recursor problem

Bernd Schubert bernd-schubert at gmx.de
Tue Jun 20 07:55:00 UTC 2006


we are running pdns using the ldap backend. All local systems are in the 
ldap database. Only for non-local hosts the recursor should be used. 
Last night the URZ (university computer center) dns server went down, 
unfortunately also causing problems for our local systems:

Jun 20 06:43:03 hamilton1 pdns[10323]: Error receiving packet from recursor backend: Connection refused
Jun 20 06:43:03 hamilton1 pdns[10323]: Recursive query for remote with internal id 9 was not answered by b
ackend within timeout, reusing id

The config file has "lazy-recursion=yes" and for the ldap-backend "ldap-method=strict"

dig +norecursive @ landau.pci.uni-heidelberg.de

; <<>> DiG 9.2.4 <<>> +norecursive @ landau.pci.uni-heidelberg.de
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54555
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;landau.pci.uni-heidelberg.de.  IN      A

landau.pci.uni-heidelberg.de. 3600 IN   A

;; Query time: 1 msec
;; WHEN: Tue Jun 20 09:42:50 2006
;; MSG SIZE  rcvd: 62

Any idea why those error messages in the log file happend? Any what should I 
Well, I wouldn't mind those error messages, but unfortunately local login, 
shells, etc. on the clients also didn't work anymore.

Also, another question. It happens rather often that one of  the URZ dns 
servers is down, how can I specify two of them? So far we have 

Thanks in advance,

Bernd Schubert
PCI / Theoretische Chemie
Universit├Ąt Heidelberg
INF 229
69120 Heidelberg

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