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slow network in ubuntu

by Jörg Baach last modified Jun 09, 2010 08:39 AM
especially command line network utilities (wget etc.) take a long time to resolve names, but only behind certain routers.

I first tried to put

GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1 quiet splash"

in /etc/default/grub. This disables ipv6 (no devices present), but doesn't solve the slow name resolution.

Wireshark confirms that AAAA requests are sent to the dns, but they don't get resolved.

Solution seems to be in

https://bugs.launchpad.net/ubuntu/lucid/+source/eglibc/+bug/417757/comments/75

So,

apt-get install pdns-recursor

and setting 127.0.0.1 as the dns for my specific connection in network manager solved the issue

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