[Pdns-users] ldap & recursor problem

[Bernd Schubert]

Hello,

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 129.206.21.124 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 @129.206.21.200 landau.pci.uni-heidelberg.de

; <<>> DiG 9.2.4 <<>> +norecursive @129.206.21.200 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

;; QUESTION SECTION:
;landau.pci.uni-heidelberg.de.  IN      A

;; ANSWER SECTION:
landau.pci.uni-heidelberg.de. 3600 IN   A       129.206.21.124

;; Query time: 1 msec
;; SERVER: 129.206.21.200#53(129.206.21.200)
;; 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 
do?
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 
"recursor= 129.206.100.126".

Thanks in advance,
	Bernd

-- 
Bernd Schubert
PCI / Theoretische Chemie
Universität Heidelberg
INF 229
69120 Heidelberg