Where are all those Teredo servers coming from?

[Eric Vyncke (evyncke)]

As you may know, I am running a pseudo BitTorrent client to collect IPv6 addresses (http://www.vyncke.org/ipv6status/p2p.php) but this WE when running the collecting program, I was amazed by the number of Teredo servers (there are usually just 4 or 5 all based in Microsoft). This WE I saw dozens of them, most of those 'new' servers are used only by one single client... and they are located everywhere !

Any idea? A new feature of Windows? Or of a bittorrent peer (to obfuscate the P2P traffic? Wrongly configured Windows machines? )

See below a copy of a couple of Teredo servers:
2001:0:142e:1f*:0:12f0:92b7:6c* = 20.46.31.* (client: 109.72.147.*)
2001:0:1a94:63*:0:2aac:92b7:6c* = 26.148.99.* (client: 109.72.147.*)
2001:0:1b76:ce*:0:1834:a30f:25* = 27.118.206.* (client: 92.240.218.*)
2001:0:26b1:6d*:0:375c:92b7:66* = 38.177.109.* (client: 109.72.147.*)
2001:0:2859:73*:0:46b7:92b7:6d* = 40.89.115.* (client: 109.72.146.*)
2001:0:2c03:c7*:0:1d6a:92b7:6d* = 44.3.199.* (client: 109.72.146.*)

Any piece of information will be welcome of course

-puzzled-éric

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cluenet.de/pipermail/ipv6-ops/attachments/20120701/7974d0d4/attachment.htm>