David Shultz wrote:
Whenever I browse any website, mozilla says
"Resolving www.google.com <http://www.google.com>" and waits for about
15 seconds to resolve the host. I've disabled
ipv6 but the problem is still there. Also I've
checked the isp nameserver and they are fine.
Does anyone has the same problem?
--David
This sounds like it could be a couple of things that I have run into.
First, it could be an mDNS(multicast dns) problem. That gave me fits
for a while.
I cured it one by uninstalling avahi-daemon, as I don't have use any
software that relies on this function(I did this just to stop an
unnecessary daemon), and also editing my /etc/resolv.conf file so it
didn't contain a line that used the word "local". This word being in
resolv.conf is/was a bug in Avahi-daemon, IIRC, that caused all DNS
lookups to be run as mDNS lookups first, and then go to the nameserver
picked up through dhcp, or in /etc/network/interfaces if you're using
static ip addresses, when the mDNS queries finally time out.
Second was the ipv6 lookups. I fixed that by blacklisting the ipv6
module and all those extraneous dns queries disappeared.
The way I found the mDNS problem with extremely long url resolution
times was to start an ethereal/wireshark packet capture, and then fire
up my browser. That's when I found that all dns queries were going to
224.0.0.xxx (mDNS).
I think the bug is now fixed as I just reinstalled a laptop a few days
ago and I didn't have to make any changes in resolv.conf. DNS worked
correctly from the very first, and that hadn't happened with any Etch
installs I'd done in the last month or so.
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