Disable IPv6 Teredo Tunneling in Windows Vista

If you do not use IPv6 tunneling on your computer network, then leaving it enabled may raise security concerns. Although Windows Vista does not allow you to disable the Teredo Tunneling, you can still disable this. Here is how :

Method 1:

  1. Press the keyboard combination Windows logo key + R to open the Run dialog.
  2. Type regedit and press Enter to open the Windows Registry Editor.
  3. Navigate to the following key in the Registry Editor :
  4. Right-click on the right-side pane and choose New → DWORD value. Give the new value DisableParameters. Double click on it and set the value to 8 (hexadecimal).

  5. That’s it, now its disabled.

Method 2:

  1. Open an elevated command prompt.
  2. In the command prompt window, type the following and press Enter :
    netsh interface teredo set state disabled

  3. That’s it, now its disabled.