Comment 29 for bug 155393

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Ralph Corderoy (ralph-inputplus) wrote : Re: [Bug 155393] Re: Internet extremely slow in Gutsy after upgrade

Michael, thanks, that helps. You machine is issueing IPv6 AAAA address
queries and is sometimes getting back 1.0.0.0 as an answer. It then
tries to contact this incorrect address. It's almost certainly the poor
implementation of a DNS server in your router not coping well with IPv6.
It has been triggered again by a regression in 7.10. See bug #156720
for where they think they've fixed it for 7.10 and
https://bugs.launchpad.net/ubuntu/+bug/81057/comments/26 for some notes
on how to get the fix.