Hello Runxia,
On 18 Dec 2014, at 10:53 , RunxiaWan <[email protected]> wrote:
> I am trying to test powerDNS’s behavior and find something strange. When I
> use hint-file configuration to set a hint-file, powerDNS-recursor will just
> use the ip address in hint file without doing a NS query to root server. I
> wonder if it is a implement difference( cause I know bind and unbound would
> do a NS query) or I wipe the cache in a wrong way(I use ”rec_control
> wipe-cache .” to wipe the cache).
Dec 19 14:04:09 Done priming cache with root hints
14:04:10.074423 IP (tos 0x0, ttl 64, id 16861, offset 0, flags [DF], proto UDP
(17), length 45)
188.226.149.249.61214 > 202.12.27.33.53: [bad udp cksum 0x3834 -> 0x967e!]
16095 NS? . (17)
14:04:10.086680 IP (tos 0x0, ttl 61, id 58479, offset 0, flags [none], proto
UDP (17), length 520)
202.12.27.33.53 > 188.226.149.249.61214: [udp sum ok] 16095*- q: NS? .
13/0/15 [answer omitted]
Dec 19 14:04:10 Refreshed . records
In other words, I see an NS query to one root server (a different one for each
of 3 attempts).
Can you clarify your question and/or show us what you are seeing?
Kind regards,
--
Peter van Dijk
Netherlabs Computer Consulting BV - http://www.netherlabs.nl/
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