Windows Server 2008 - DNS
Windows Server 2008 - DNS
The principles for DNS in Windows Server 2008 are much the same as they were for Windows Server 2003.
Active Directory absolutely requires DNS. In particular, Active Directory relies on DNS to find resources such as Global Catalog and Kerberos. In Windows Server 2008, DNS combines support for standard DNS protocols with the benefits of integration with Active Directory Domain Services (AD DS).
DNS enables we humans to use meaningful names such as 'BigServer' instead of pure dot decimal IP addresses. (Or colon hex numbers for IPv6). The DNS server responds to requests from clients such as XP or Vista to provide the IP address associated with a mail or web server's DNS domain name. The beauty of DNS is that it's scaleable because the domain names can be organized into a hierarchy.
Practical Tasks for DNS in Windows Server 2008
Your first decision is one of approach. Do you take the simplistic approach? In which case accept the defaults and go with the simple choices. When you create a Domain Controller (see Add roles) it is automatically configured to use the appropriate DNS servers for name resolution.
This method either works incredibly easily, or else it goes spectacularly wrong; in which case you have to go back to the drawing board, and probably you should ask for guidance from someone who has installed and configured DNS before.
The other approach is to practice with DNS on a test network, have one hand on the keyboard and the other hand thumbing a text book.
For both approaches, the first task is plan your names. What will be the name of your Active Directory domain? Will it be the same name as your DNS domain?
The second task is to install the DNS service. Start with the Server Manager, and the Add roles and let the wizard install and configure the DNS role.
Wherever possible choose Active Directory Integrated DNS. Microsoft Active Directory, working with Microsoft DNS must be better than mixing Microsoft AD with UNIX DNS.
Mr Average and Mr In-a-Hurry do not need to study DNS in depth. It's near enough the same as DNS in Windows Server 2003. The main thing to know is that Microsoft's Windows Server 2008 DNS is compliant with RFC (Refer For Comments) standards, for example RFC 2136 for Dynamic DNS.
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What's New In Windows Server 2008's DNS
This is a new way for Vista clients to contact their local Domain Controller. Principally a mechanism for laptops. With XP laptops could get 'locked on' to a distant server, when the laptop returns to base it still fixates on the distant DC. With Vista, it occasionally tries to find the nearest DC, thus breaking an inappropriate 20 hop link with a distant DC when there is a perfectly good Domain Controller in the same building.
GlobalNames Zone (GNZ)
Should you need to experiment with GlobalNames, then you need to create a
particular zone, this is how you perform the action from the command-line:
Alternatively, you could use the DNS GUI and create a zone called precisely: GlobalNames (not case sensitive).
Once you have created this special zone called GlobalNames, then add CNAMES which point to the FQDN of the appropriate mail or web server.
Useful DNS Features First Introduced in W2K3 (Windows Server 2003)
DNS Integrated with Active Directory
DNS Stub Zones
Dynamic Update Protocol
Incremental Zone Transfer (IXFR)
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