R6020 blocking access to certain websites

Netgear has set up a community forum specifically for General Router products. Most of the people who watch that forum are more likely to have experience with older routers and know how to work it better than those of us who follow this router forum. Might be more likely to find someone who has a solution if the question is posted there:
https://community.netgear.com/t5/General-WiFi-Routers-Non/bd-p/home-wifi-routers-general

Try a factory reset on the router and setup from scratch. 

Be sure your not in a double NAT condtion with a router in front of the 6020 router. 

Please use this link to the main forum product list to review and choose where to make your posts. 
https://community.netgear.com/t5/NETGEAR-Forum/ct-p/en-netgear

Thank you