Every time you get e-mail, every time you access a web page, you use the Domain Name System (DNS). In fact, over 2 billion such requests hit the DNS root-servers alone every day. Every one of those 2 billion requests originate from a DNS that supports a group of local users, and every one of them is finally answered by a DNS server that may support a high-volume commercial web site or a modest, but much loved, family web site. This book is about understanding, configuring, diagnosing, and securing the DNS servers that do the vital work. Many years ago when I set up my first pair of DNS servers, I wasted my time looking for some practical advice and some sensible description of the theory involved. I found neither. I completed the ...

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