Slow DNS Lookup (and no IPv6-issue???)

Hi,

my dns lookups take several (~ 6-10) seconds every time. I tried a lot
of things, but now I ran out of ideas. What I tried up to now is:
- Deactivate IPv6: The most common advice about slow dns lookups
didn't work in my case. IPv6 is already successfully deactivated (at
least "lsmod | grep ipv6" claims that), but the problem continues.
Also deactivation IPv6-lookups for certain programs (like firefox or
ssh) doesn't help.
- Use other nameservers: Changing the nameserver in /etc/resolv.conf
to other ones didn't change anything as well. Besides, the original
nameservers are working well on other systems!
- Adding "option timeout:1" to or removing "domain ..." or
"search ..." lines from the /etc/resolv.conf file: Also didn't help...

Any further ideas?

Thanks!
Chris

PS: Distro "Debian Lenny Amd64" out of the box, only ndiswrapper
installed and WLAN configured
.

Relevant Pages

  • Re: nscd cacher problem
    ... much to do with the library doing V6 DNS lookups. ... make it stick to ipv4 and all my DNS lookup problems vanished. ... If you really want to disable IPV6, ... To unsubscribe or change subscription options: ...
    (Fedora)
  • Re: nscd cacher problem
    ... much to do with the library doing V6 DNS lookups. ... I hope nscd authors will fix it soon so it does not ... and I was no longer able to restart nscd service. ... If you really want to disable IPV6, ...
    (Fedora)
  • Re: Delayed DNS server response ...
    ... never used IPv6 DNS lookups even on IPv6-enabled systems. ... Besides, if you watch closely the result of Albrecht's ping test, you will see that the delay in twice as in the nslookup test, meaning that both direct and reverse DNS lookups are delayed. ... However a reverse lookup is just a standard PTR query and has nothing to do with IPv6. ...
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  • Re: [FC3] Sites disappearing from DNS
    ... > you turned off IPv6? ... IIRC firefox had issues timing out DNS lookups via ...
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