[Pdns-users] Problems with IPv6

[Michael Holm]

Hi,

I have had a weird powerdns for some time now, i couldnt really find out 
where the problem was.. it seemed so random.. but now it starts 
borthering my too much :)

Now i have found a way to provoke the problem every time, and i found a 
way to debug the problem away, but cannot find a stable solution, but i 
think there might be something that i can do to my powerdns install in 
order to get it to work..

Well first of all, when i make a query from my computer behind a firewall:

hollo at pjok:~$ host -a google.dk ns2.2fast.dk
i get a responsetime which is around 3 seconds before i query the dns 
server, and then the response comes right away.

hollo at pjok:~$ host -a google.dk ns2.2fast.dk
Trying "google.dk"
Using domain server:
Name: ns2.2fast.dk
Address: 62.199.234.12#53
Aliases:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53369
;; flags: qr rd ra; QUERY: 1, ANSWER: 7, AUTHORITY: 4, ADDITIONAL: 4

;; QUESTION SECTION:
;google.dk.                     IN      ANY

;; ANSWER SECTION:
google.dk.              672     IN      A       216.239.59.104
google.dk.              672     IN      A       72.14.221.104
google.dk.              672     IN      A       74.125.77.104
google.dk.              86675   IN      NS      ns1.google.com.
google.dk.              86675   IN      NS      ns2.google.com.
google.dk.              86675   IN      NS      ns3.google.com.
google.dk.              86675   IN      NS      ns4.google.com.

;; AUTHORITY SECTION:
google.dk.              86675   IN      NS      ns4.google.com.
google.dk.              86675   IN      NS      ns1.google.com.
google.dk.              86675   IN      NS      ns2.google.com.
google.dk.              86675   IN      NS      ns3.google.com.

;; ADDITIONAL SECTION:
ns1.google.com.         36215   IN      A       216.239.32.10
ns2.google.com.         35546   IN      A       216.239.34.10
ns3.google.com.         34219   IN      A       216.239.36.10
ns4.google.com.         34219   IN      A       216.239.38.10

Received 277 bytes from 62.199.234.12#53 in 12 ms

If i try from a computer outside my firewall, its seems like the 
response comes right away, i will only have to wait the expected 12 ms..

Then what i tried was.. put a parameter -4 in my query on my local 
computer which is behind firewall, then the response came just as fast 
as the computer outside the firewall..

By that i guess i can disable ipv6 since i dont use this on my dns 
servers.. in order to make this to work propperly..

My version of powerdns is: 2.9.22.

Hope that some has a thought of what could be wrong in my senarie?

-- 
mvh
Michael Holm