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Paul Mockapetris, the inventor of DNS and chief scientist at secure DNS provider Nominum, said DNS is like the water of the Internet. In that analogy, OpenDNS is like bottled water. If you use it, you don't have to trust the local water, which may be polluted or diseased, Mockapetris said.

"Of course, you have to trust the OpenDNS folks, and I suspect they are looking forward to showing you advertising. So maybe it is more like Gatorade, and maybe they will fluoridate their DNS and add stuff that will kill your prized fish in the aquarium as well as the phish they are looking for," he said.

Read full story: CNET News

Related topics: DNS, Security