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Tracking Unexpected DNS Changes, (Thu, Jan 31st)

DNS is a key element of the Internet and, regularly, we read new bad stories. One of the last one was the Department of Homeland Security warning[1]  about recent DNS hijacking attacks[2]. Indeed, when you want to visit the website ‘’, you must be sure that the visited server will be and not a malicious one controlled by a malicious server. From an end-user point of view, we have to rely on the DNS. it’s not easy to detect unexpected changes but you can implement your own checks to tracks changes for your most visited websites. But from a website owner or network admin perspective, it is indeed a good practice to ensure that DNS servers authoritative for our domain zones are providing the correct information. At the Internet Storm Center, we must be sure that any request to resolve ‘’ will always return the right IP address! 

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