pero on anything

“Internet slow” means actually “DNS slow”. After upgrading to Ubuntu 9.10 I experienced a strange and very annoying lag in DNS resolution. Running dig in a shell worked like a charm. But Firefox, Synaptic and everything else was hanging at DNS resolution.

To make a long story short (you probably read a lot of forum threads about this): Our Karmic Koala uses IPv6 for DNS queries and only if this fails it falls back to IPv4. A lot of home routers do not support IPv6 DNS queries. DOH!

Resolutions:

1. Firefox only: Disable IPv6 support by typing “about:config” into your location bar, then search for ipv6 and disable it by clicking on the line.

2. Disable IPv6 entirely: If you do not need IPv6-Support (I don’t) you could disable it completely and everything is up to speed again. How do I do this?

This entry was posted on Sunday, November 8th, 2009 at 10:34 pm and is filed under linux. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.