Yep, I personally used Google's DNS and it worked.

I just posted a solution on this other thread: http://forum.tp-link.com/showthread.php?89912-Nest-Thermostat-and-TL-MR6400-settings-any-tips-welcome!

After hours of trial and error, I finally found a solution. On the admin website of TP-LINK, go to DHCP > DHCP Settings, and set Primary and Secondary DNS. You can use Google's DNS for instance :...