Yes first I set the dmz zone on the router then reading the article I checked the router behind router box. Disabling everything except ping. I needed ping for the IPV6 Tunnel service from Hurricane Electric. I Tried automatic settings for IPV6 on MY D-link 825 version B. But not luck, so I used the manual settings page and I must have had enough information from Hurricane Electric to get IPV6 works on All my computers. Voila Route able IP address and a website on every pc using my At&T Uverse service.