On Tue, Feb 16, 2010 at 08:14:13AM +0100, Mikael Abrahamsson wrote: > On Tue, 16 Feb 2010, Nathan Ward wrote: > > >Perhaps they have Teredo and 6to4, and could not reach you via 6to4 so > >instead used Teredo, or, any number of scenarios. > > I think their only IPv6 connectivity was Teredo (for instance, they're > behind NAT), and thus they used it to get the IPv6 only content.
So for our case here at Southampton our web presence www.ecs.soton.ac.uk is advertised via both A and AAAA records. What we see is less than 1% of our IPv6 traffic coming from the Teredo prefix. 6to4 is at most 1%. I think the reason we see less 6to4 than some might expect is that a lot of our IPv6 accesses may be from other academic networks where IPv6 is available 'properly'. I had our web guys send me a log of recent Teredo accesses to our servers and the user agents were varied. As Tore suggested, Opera 9.8 was on the list (since fixed), but also some Mozilla-based entries from both Linux and Windows platforms. Total entries: 761 Opera 9.8: 354 Firefox 3.5.7 (Windows): 61 Firefox 3.5.7 (Linux): 96 Iceweasel 3.5.6 (Linux): 8 Mozilla 4.0 (Windows): 242 Not a huge sample, but it shows Windows UAs hitting us from the Teredo prefix. -- Tim