Greg Ferro’s post about how Microsoft Teredo is a suboptimal networking solution made me think it’s time to update my old post on how to disable Teredo in Windows 7 and in Windows 8. For the record, I agree — I’ve had serious problems with it conflicting with my native IPv6 connectivity.
1. Open a command prompt with administrator privileges (Start->Accessories->right click on Command Prompt, choose Run as Administrator):
2. Issue the command:
netsh interface teredo set state disabled
3. You may need to reboot, depending on your version of Windows.
If you wish to re-enable Teredo at some point you can issue the command:
netsh interface teredo set state type=default
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Can you please say how I might know if the sluggish networking problems I am seeing on a Win 7 laptop might be as a result of teredo? (I’m interested in knowing if there are any other symptoms, such as a way of seeing the number of half-open teredo connections)
I will be testing this command to see if it fixes the problem, but it would be satisfying to have a mechanism too – since I may be making the case to my boss that we apply this widely. thanks!
Try tracert and see if your traffic is heading out via the Teredo interface/addresses. Alternately, you can disable Teredo and see if that improves things.