Have a look at this!
Website Filter Parameters
Website URL/Domain
Enter the URL (address) of the Web Site that you want to allow or deny; for example: google.com.
Do not enter the http:// preceding the URL. Enter the most inclusive domain; for example, select allow and enter dlink.com and access will be permitted to both www.dlink.com and support.dlink.com.
Note: Many web sites construct pages with images and content from other web sites. For example, to access my.yahoo.com, you would need to select allow and type yahoo.com, yimg.com, and doubleclick.net.