Teredo sunset - did it happen?

Carl Holzhauer cholzhauer at sscorp.com
Mon Nov 17 18:02:10 CET 2014

Why not just disable teredo at the command line?

netsh int ipv6 set teredo disabled

-----Original Message-----
From: ipv6-ops-bounces+cholzhauer=sscorp.com at lists.cluenet.de [mailto:ipv6-ops-bounces+cholzhauer=sscorp.com at lists.cluenet.de] On Behalf Of Phil Mayers
Sent: Monday, November 17, 2014 11:55 AM
To: Jeroen Massar; IPv6 Ops list
Subject: Re: Teredo sunset - did it happen?

On 17/11/2014 16:40, Jeroen Massar wrote:
> On 2014-11-17 17:38, Phil Mayers wrote:
>> On 17/11/2014 16:23, Jeroen Massar wrote:
>>> What are you trying to achieve by blocking that port?
>> I honestly don't know why you want to talk about other things, but 
>> I've no interest in discussing them with you.
> Then don't make statements that you are blocking them...

In the interests of the principle of charity - I am trying hard to assume good motives on your part - let me try again...


We've historically blocked Teredo, for probably erroneous reasons. I'd like to unblock it, to specifically let XBox One consoles use their new Teredo stuff.

At the same time, I'd like to avoid even the possibility of triggering a behaviour change on Microsoft Windows clients. I had thought Teredo was sunsetted, but examination of my Windows 7 PC suggests it is not, although it is broken.

To inform my decision about unblocking it, I'd like to ask a few questions.

Does anyone know why Teredo has not been sunsetted yet?

Does anyone know when Teredo will be sunsetted?

Does anyone know of a safe way to block Teredo from Microsoft Windows clients, but leave Teredo from XBox One unaffected? Jeroen, your suggestion of blocking the DNS name is a good one. Anyone any other ideas I should also consider.


Hopefully this is specific enough...

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