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I have a Windows 8.1 computer that is stock - almost no settings have been changed. I want IPv6 Connectivity via Teredo; however, it does not work.

  1. ipconfig shows a Teredo IPv6 address (2001:0:9d38:so:on:and:so:forth)
  2. My firewall (linux) sends out the Teredo UDP packets - which I ping an IPv6 address I see them exit my router on eth1
  3. No packets come back in response
  4. My firewall logs shows no packets block/dropped from the IPv4 address the Teredo packets are sent to

I'm not quite sure what the problem is - although I didn't sign up for a Teredo service. Does Microsoft run one for it's users? Could it be down or discontinued?

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  • Teredo is quite possibly the most unreliable method you could possibly have chosen. Please don't even attempt to go any further with this, if you value your sanity. Feb 17, 2014 at 4:19
  • Which is ironic, because the reason I'm trying to get it to work is for Remote Assistance Easy connect, which should be as simple and user-proof as possible.
    – Tom Ritter
    Feb 17, 2014 at 13:09
  • What does IPv6 have to do with remote assistance? Didn't Microsoft already figure out how to punch that through NAT? Feb 17, 2014 at 14:33
  • According to messengergeek.wordpress.com/2012/02/07/… Remote Assistance Easy Connect uses IPv6
    – Tom Ritter
    Feb 17, 2014 at 17:56
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    Aha, so PNRP is an IPv6-only protocol. Nice work. I suppose at the time, using Teredo when only native IPv4 was available was a reasonable decision, but it just hasn't worked out in practice as well as its proponents claimed. It doesn't punch through NAT nearly as well as expected, and you also are relying on a completely unknown Teredo relay, which may not even exist. I suggest you just get a tunnel from SixXS or HE. Feb 17, 2014 at 18:02

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It seems like Michael was right - and although Windows 'supports Teredo out of the box' whoever is on the other end of that tunnel doesn't support Microsoft.

After signing up for a tunnel with HE, and running their configuration commands, it worked instantly and Remote Assistance Easy Connect was also able to connect.

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