Quick overview:
The IPv6 protocol is the successor to the IPv4 protocol and attempts to eliminate the weaknesses of its predecessor. However, IPv4 is still widely used, so although IPv6 is present in Vista, it is rarely needed at present. We will show you how to deactivate IPv6 under Windows Vista.
[By Raimund Machacek]
IPv6 support is provided in Windows Vista by the so-called "Teredo Tunneling Pseudo-Interface" is guaranteed. In short, this provides automatic IPv6 tunneling for hosts that are separated by IPv4 NATs.
As a normal user, IPv6 is therefore not required and can even cause problems in some cases. We will show you how to deactivate IPv6 (and reactivate it if necessary).
To do this, call up the Device Manager: "Right-click on computer -> Properties -> Device Manager" or via the control panel.
Now activate in the menu under the item "View" the option "Show hidden devices". Now navigate in the list to the item "Network adapter". Expand it by clicking on the "+" and you will now see the above mentioned "Teredo Tunneling Pseudo-Interface". Now right-click on it and select "Deactivate". Confirm the warning with "Yes"and the device is now deactivated.
To reactivate the adapter, simply follow the instructions above and select "Deactivate" simple "Activate".
Interested readers should also refer to the Technet document that describes Teredo in more detail:
http://download.microsoft.com/download/3/5/9/359fa238-df02-493b-ac71-39b14f6aee36/teredo.pdf
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