How do I block websites or internet services on my Nighthawk router?

Log in to the router at http://www.routerlogin.net with username 'admin' and your password. Go to ADVANCED > Security > Block Sites to block websites using keywords, or ADVANCED > Security > Block Services to block specific services by type. You can set blocking to run all the time or on a schedule. The keyword list supports up to 32 entries. (Page 45-50)