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If you can find no reason for the DNS Server service to have stopped, you can try to start it again. At the opposite extreme, you can close off your network from the outside world by denying all Internet access, ……, but they also compromise the functionality of the network by preventing users from accessing the Internet. |
This two sentences, I read these days, are the typical concept from the text book. I am so familiar with the first sentence since I say it to my clients every day, "reboot", "reboot" and "reboot". I finished the name resolution part this week, the key idea which the text book repeat again and again is that set more servers for fault tolerance. In the main lessons, reviews, practices and exercises, Microsoft says that hundreds times. Clearly, that means you have to buy more licenses if you have more servers. I feel the book is more like a brain washing marketing book instead of a textbook.
DNS and Active Directory is the solution for name resolution, the lesson also mentions the hacks’ skill of attacking DNS servers are Denial-of-service (DoS) attacks (flooding), Footprinting (get the useful information), IP spoofing (use faked identity) and Redirection.
For learning and practicing, I use the Microsoft Virtual Server and Microsoft Virtual PC as the tools to run the Windows Server 2003 under normal Windows XP system. It works little slow but very stable, provide some very useful functions and configurations. It is recommended if you don’t have enough computer to test the server performance or as lazy as me, since I don’t even want to open the CD-ROM’s door at the besides computer.