Domain Name System (DNS) servers act as a phone book. When you type "pcworld. in" in the address bar, for instance, Internet Explorer sends that common-name request to your Internet service provider's DNS servers to be converted into a series of numbers, or an IP address. Lately, DNS servers have come under attack, with criminals seeking to redirect common DNS preferences to servers that their interests control. One way to stop such abuse is to use OpenDNS.

Go to Start, Control Panel, Network and Internet, and then click Network and Sharing Center. Under the tasks listed on the left, click Manage Net-work Connections.

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In the Manage Network Connections window, do the follOWing.

1. Right-click on the icon repre¬senringyour nerwork card.

2. Click Properties.

3. Click Inrerner Protocol Version 4.

4. Click the Properties buuon.

5. Selecr the Use the following DNS server addresses radio burton.

6. Type in a primary address of 208.67.222.222.

7. Type in a secondary address of 208.67.220.220.

8. Click OK.