Denic (.de) blocking 6to4 nameservers (since begin feb 2010)

Mikael Abrahamsson swmike at
Tue Feb 16 06:34:49 UTC 2010

On Tue, 16 Feb 2010, Nathan Ward wrote:

> You are very unlikely to get traffic from Teredo, because:
> 1) Windows only asks for AAAA if it has non-Teredo IPv6 connectivity

Please don't just say "windows" as the different versions of windows 
behave differently, as we've already discussed in the thread here:


Windows XP will happily use Teredo when faced with AAAA response only.

What you're describing is Vista and Win7 I guess?

Mikael Abrahamsson    email: swmike at

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