The Teredo Server Name machine setting should be configured correctly. This policy setting allows you to specify the name of the Teredo server. This server name will be used on the Teredo client computer where this policy setting is applied. If you enable this policy setting, you can specify a Teredo server name that applies to a Teredo client. If you disable or do not configure this policy setting, the local settings on the computer are used to determine the Teredo server name. Fix: (1) GPO: Computer Configuration\Administrative Templates\Network\TCPIP Settings\IPv6 Transition Technologies\Teredo Server Name (2) KEY: HKLM\Software\Policies\Microsoft\Windows\TCPIP\v6Transition\Teredo_ServerName