[Pdns-users] Questions About Authority

Anthony Eden anthony at sdc-hawaii.co.mp
Thu Nov 11 21:23:12 UTC 2004

I just switched back to Bind on ns2 and then checked the output from 
tcpdump when looking up the domain sunrise.mp.  Here is the result:

07:17:33.132853 cust18739.lava.net.32783 > [udp 
sum ok]  34851+ A? sunrise.mp. (28) (DF) (ttl 55, id 0, len 56)
07:17:33.132964 > cust18739.lava.net.32783: 
34851* q: A? sunrise.mp. 1/2/2 sunrise.mp. A ns: 
sunrise.mp.[|domain] (DF) (ttl 64, id 0, len 144)

Versus the following with PowerDNS:

07:09:09.944334 cust18739.lava.net.32783 > [udp 
sum ok]  40603+ A? sunrise.mp. (28) (DF) (ttl 55, id 0, len 56)
07:09:09.944935 > cust18739.lava.net.32783: [udp 
sum ok]  40603*- q: A? sunrise.mp. 1/0/0 sunrise.mp. A 
(44) (DF) (ttl 64, id 0, len 72)

Note the part which says ns: sunrise.mp.[|domain] on the Bind response 
packet but not in the PowerDNS response packet.  That seems to be the 
only significant difference.  Thoughts?


bert hubert wrote:
> On Thu, Nov 11, 2004 at 09:34:45AM -1000, Anthony Eden wrote:
>>I've tried setting up PowerDNS to first check the bind backend and then 
>>use the pipe backend to a Perl script if a result is not found in the 
>>bind data.  I am running PowerDNS installed from the RPM 
>>pdns-static-2.9.16-1.i386.rpm on RedHat 9.
> Hehe cool!
>>Yesterday I enabled this configuration on port 53 in the production 
>>environment.  I then went to a machine on the RoadRunner network (their 
>>DNS servers have the delegation-only patch applied so they are a good 
>>test) and lo and behold nothing resolved, not even the names which are 
> I'm currently very busy, may I suggest that you run tcpdump on your server
> with -v -v -v and send me the results? Ask the RoadRunner nameservers a new
> question and see what questions they ask you, and what answers powerdns
> returns. Those results will help me help you.

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