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Bug#266742: Bug can be reproduced !

retitle 266742 kdelibs: [ipv6] dns servers that are broken cause slow lookups
severity 266742 wishlist
tags + wontfix

On Sat, Sep 25, 2004 at 10:52:16AM +0200, Julien Valroff wrote:
> Hi !
> I can reproduce the problem. Just try following sites : 
> http://www.caisse-epargne.fr (French bank)
> and http://www.anpe.fr (French national job center)
> I also run an updated Sid with kde 3.3, and the environement variable does not 
> seem to fix the problem.
> Cheers,
> Julien

I'll reopen this bug and mark it wontfix since it is not a bug in KDE
but might confuse users.

The problem is the above listed sites DNS servers are broken. I talked
to someone on #debian-devel about it and this was what they had to say:

19:23 < Md> calc: well, let's start from noticing that 1/3 of the servers for
            the first zone are unreachable
19:23 < calc> Md: works when -t aaaa isn't specified
19:24 < Md> calc: broken load balancer
19:24 < Md> calc: the stupid thing just ignores queries for non-A records
19:25 < plaisthos> calc: slow dns server?
19:25 < Md> plaisthos: no, broken DNS server

If you do a lookup on a random site like the following it works just
fine, but on the specific sites you list they do not respond with
anything at all they just hang which is a problem with their site. I
don't run my own dns server and tested several other sites all with
responses in the 0.050-0.070 timespan. I am not going to "fix" it by
disabling ipv6 for everyone, feel free to contact those sites to let
them know their dns servers are broken. As to why Mozilla/Opera/etc
aren't slow, I do not know unless they have ipv6 support disabled.

Chris Cheney


calc-amd64:~# time dig -t aaaa www.cheney.cx

; <<>> DiG 9.2.4 <<>> -t aaaa www.cheney.cx
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44944
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;www.cheney.cx.                 IN      AAAA

www.cheney.cx.          14400   IN      CNAME   cheney.cx.

cheney.cx.              10726   IN      SOA     dns3.surpasshosting.com. root.pico.surpasshosting.com. 2004022106 28800 7200 3600000 86400

;; Query time: 66 msec
;; WHEN: Sat Sep 25 19:18:54 2004
;; MSG SIZE  rcvd: 114

real    0m0.069s
user    0m0.002s
sys     0m0.000s


calc-amd64:~# time dig -t aaaa www.caisse-epargne.fr

; <<>> DiG 9.2.4 <<>> -t aaaa www.caisse-epargne.fr
;; global options:  printcmd
;; connection timed out; no servers could be reached

real    0m10.004s
user    0m0.001s
sys     0m0.001s


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