@Blah-Blah
I am using the same router (Netgear) at home... what you are experiencing is one of the many embedded functions of the router. It is called Content Filtering. To Edit and Undo this setting, log on to your router's setup page:
this is how to do it...
1. Open your browser and type
www.routerlogin.com (make sure that the computer you are using is connected to your router either through WIFI or LAN connection)
2. Enter your USERNAME and PASSWORD (this is the same username and password which you would used when you connect to your router via WIFI connection)
3.After entering your username and password, you will be directed to your router's setup page. On the left side of your screen (at the setup page) click on BLOCK SITES under Content Filtering Menu.
4.Then click CLEAR LIST... This command will delete all block sites, meta-tags and etc...
5. Click APPLY...
Hope this would help you!
N.B. read the USER'S MANUAL