..hence all Web sites not listed on this page will be blocked.
You would allow only few websites (ie: Company public website and Company private sales website). But for blocking, you generally want to block a family of websites (****, social networking, competitors, auction sites, news portals) and since it isn't practical or easy to know all the sites that fit into the group and list all 12 million of them in a block list, you just list the 1-10 sites it is fine for your networked computers to go to. Outside of that you need a net nanny / layer 7 / content blocker. We can also look into the DSD-150. D-Link’s SECURESPOT Internet Security Adapter (DSD-150) is a complete all-in-one Internet security solution that provides several key features including network protection, firewall protection, virus protection, spyware protection, identity protection, pop-up blocker, SPAM blocker, and parental control - all in a palm-sized box. Provide around-the-clock protection for your data and personal information with the SECURESPOT Internet Security Adapter.