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Practice Safe DNS

Oct 22, 2010, 18:04 (0 Talkback[s])
(Other stories by Steven J. Vaughan-Nichols)

"Misery is when you head to one of your usual Web site hangouts and find yourself somewhere nasty instead because of Domain Name System (DNS) poisoning. DNS cache poisoning doesn't happen often, but when it does happen, it can make large parts of the Internet unusable. The answer to this potential poison problem? Domain Name System Security Extensions (DNSSEC).

"DNS poisoning works like this. The DNS is the master address list for the Internet. With it, instead of writing out an IPv4 address like "," one of Google's many addresses, you can simply type in "http://www.google.com" and you'll be you on your way. But, how can your browser be sure that "″ is a correct address for Google? By itself, it can't."

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