Practice Safe DNS

“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 “http://209.85.135.99/,” 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
“209.85.135.99″ is a correct address for Google? By itself,
it can’t.”

Complete
Story