Everything I read says that firewalls should be filtering Teredo IPv6 connections. ( Refer to article by Microsoft
http://msdn.microsoft.com/en-us/library/windows/desktop/bb190940(v=vs.85).aspx -- build date 10/16/2012 )
I know that there are difficulties in implementing this but I see that some users are uninstalling or doing
registry modifications to remove functionality. I think that as long as the ISATAP adapter (6to4) is working there
would be no problem to filter the Teredo Tunneling Pseudo-Adapter ( but of course I'm not a professional ).
I can't find how to filter these connections. Can anyone help?