[Pdns-users] pdns_recursor cache and NS change
david.gavarret at neufcegetel.fr
Sun May 28 16:42:28 UTC 2006
I just had a problem with a domain which NS servers changed. That was on a
server running the "old" pdns_recursor 3.1-pre1, and I wanted to know if
that was an issue of this version and if it was corrected since then (as I
can't really test as the cache will be cleared ...) ...
The old NS servers still have the "old zone" configured (bad thing!) and so
keep on answering with old values of 'www' if asked.
On the new NS servers, the zone has changed with another 'www' record.
But pdns_recursor's cache still have in memory old values. It seems that he
continues caching informations from the old NS servers.
~$ dig lacentrale.fr soa
lacentrale.fr. 85024 IN SOA ns0.ordipat.fr.
dns-admin.ordipat.fr. 2006032801 43200 18000 604800 86400
~$ dig www.lacentrale.fr
www.lacentrale.fr. 81803 IN A 188.8.131.52
~$ dig @ns0.ordipat.fr www.lacentrale.fr
www.lacentrale.fr. 86400 IN A 184.108.40.206
~$ dig @a.nic.fr lacentrale.fr ns
lacentrale.fr. 172800 IN NS ns.easynet.fr.
lacentrale.fr. 172800 IN NS ns0.easynet.co.uk.
~$ dig @ns.easynet.fr www.lacentrale.fr
www.lacentrale.fr. 7200 IN A 220.127.116.11
Changes on the 'lacentrale.fr' zone have been done on May 11th.
Should pdns_recursor have upgraded its cache with lokking at the root
servers for '.fr' zones ?
Thanks for your inputs,
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