[kde-linux] Weird DNS behaviour
Alexander Harrowell
a.harrowell at gmail.com
Fri Jul 15 13:34:27 UTC 2011
OK, so some time ago, a WLAN I regularly use was showing poor DNS
performance. I configured OpenDNS's server 208.67.222.220 through
KNetworkManager for that network.
More recently, the problem has been fixed, and OpenDNS's business model
(spuriously fail random lookups and redirect to an ad-shitty "guide"
page) is highly vexing.
Here's the weird bit; I've long since removed the configuration setting
and told KNM to get everything through DHCP. Checking /etc/hosts,
/etc/resolv.conf, etc the network's local DNS cache gets configured.
I've checked a lot of other config files and I can't find any reference
to 208.67.222.220 anywhere.
Doing a:
sudo /etc/init.d/nscd force-reload
is the standard recommendation. It solves the problem for apps that use
the system nscd, but only for that session; when I log on to that WLAN
another time, I have to kick nscd again.
Of course, Mozilla Firefox has its own internal stub-resolver and cache.
But closing down the browser and restarting, plus flushing the browser
cache, doesn't necessarily get rid of OpenDNS.
Other than obvious places like /etc/hosts, /etc/resolv.conf,
/etc/dhclient.conf, is there somewhere in KDE4.6r6 that it might be
cached?
--
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