Windows Server 2003 R2, also applicable in these above versions (Windows 2008 & Windows Server 2012) - must be a Domain Controller.
In this Tutorial we will be using Windows Server 2008 server, the procedure that you are about to read will be similar to Windows Server 2003 R2 and Windows Server 2012.
Open up the Group Policy Management Management
(click on Start and type Group Policy Management, hit enter)and locate the Organizational Unit (OU), expand User Configuration
, expand Windows Settings
, expand Internet Explorer
then click on Security
and double click Security Zones and Content Ratings
On the Security and Privacy Settings
properties, under Content Ratings
select Import the current Content Ratings settings
, then click on Modify Settings
then click OK.
On Content Advisor
properties, click on Approved Sites
tab, in Allow this website
you may select Always
, to Allow a website then click OK.
to block a website then click OK.