Making IPv6 access available

Thanks to the Party, and thanks to the government.

Referring to many blog posts mentioning Teredo Tunneling Protocol, I know that a teredo server provided by Microsoft, teredo.ipv6.microsoft.com, as a default option in both Windows Vista and Windows 7, is blocked by the GFW (or the routers of China Unicom network, I don't know).

To avoid the blocking, you could set your teredo client server as following:
Starting Command Prompt as administrator, entering

netsh int teredo set state server=teredo.remlab.net.

teredo.remlab.net is a teredo server located at France, it is available now and a best choice at China Mainland. Other options available here.
If you messed up, you could always use the following command to reset all the settings.

Reset teredo settings:
netsh int teredo set state default server=default
Reset IPv6 settings:
netsh int ipv6 reset

A bunch of IPv6 addresses of Google services is listed here. The information will be updated irregularly. You may cannot access this address owing to the blocking, try it using a proxy.

Happy tunneling! 祝翻墙愉快！