Používáš teda ten protokol a máš nějaký problém?
http://social.technet.microsoft.com/Forums/windows /en-US/350807c7-90ea-4556-859b-0d69d58303af/micros oft-isatap-adapter-2?forum=itprovistanetworking
http://answers.microsoft.com/en-us/windows/forum/w indows_7-hardware/teredo-tunneling-pseudo-interfac e-this-device/757db042-c91e-464c-b963-c1f442fdf925