Dns On Windows Server 1002003 [Electronic resources] نسخه متنی

4.2 Installing the Microsoft DNS Server

Our plan for
the


Movie U. network is to run name servers on two hosts:
terminator and wormhole.
But a fresh installation of Windows Server 2003
doesn't include the DNS server by default, so we
need to install it on these hosts.^[1]

^[1] We cover one
method for installation here, but you could also install the DNS
server using Active Directory, as described later in this
section.

Start by selecting Start
Manage Your
Server. This brings up the
administrator's one-stop-shopping application,
Manage Your Server, as shown in
Figure 4-2.

Figure 4-2. Manage Your Server

Choose Add or remove a role. The
next window is titled Preliminary Steps
and we don't show it, but it just
admonishes you to have the computer connected to the network and any
peripherals and to have your installation media handy. After clicking
Next on this screen, you might (or
might not)^[2] see the Configuration Options screen, which gives you
the option to install several common services all at once or pick and
choose a custom configuration. We don't show this
screen either, but choose Custom
configuration and click Next.

^[2] The Configuration Options screen is
apparently displayed only when you add the first role. After that,
Windows assumes you know what you're doing and
doesn't offer this shortcut to install multiple
roles at once.

Now you're presented with the Server Role window, shown in Figure 4-3. Select DNS
server as shown in the figure and click Next.

Figure 4-3. The Server Role window

The resulting window, Summary of
Selections, describes the actions about to be taken. Click
Next to install the DNS server and
do some preliminary configuration. After the installation from the
media completes, the
Configure Your Server Wizard starts the
Configure a DNS Server Wizard, which is shown in Figure 4-4.

Figure 4-4. Configure a DNS Server Wizard

If you want to, at this point you can review the checklists, but
since we're walking you through this process, select
Next and you'll see
the Select Configuration Action
window shown in Figure 4-5.

Figure 4-5. Select Configuration Action Window

The wizard can helpfully create both forward- and reverse-mapping
zones for you, but we're going to show you how to do
that outside the wizard. That's why we suggest you
select the third option, Configure root hints
only. Don't be scared off by the warning
that this step is for advanced users only. Here's
what's happening: after the wizard completes, your
newly installed name server will not be authoritative for any zones
and it will know only about the Internet's root name
servers. So it will know how to contact other name servers (starting
with the root name servers) to resolve domain names, but it
won't know anything in particular about your
organization's zonesyet.^[3] Click Next and the
wizard shows one more window telling you that it's
done. After clicking Finish on that
window, you're back to the Configure Your Server
Wizard's last window. Click Finish and,
congratulationsyou've installed the DNS
server.

^[3] A
name server that isn't authoritative for any zones
is called a caching-only server. We describe
this in more detail in Chapter 9.

4.2.1 Active Directory

We should point out that there's another way to
install the DNS server and it has to do with Active Directory. You
can promote a server to be a domain controller by running Manage Your Server and selecting the Domain Controller role. Active Directory
requires that certain information about Active Directory domains be
present in DNS. When you create the first domain controller for an
Active Directory domain, the domain controller installation process
tries to add this necessary information to the appropriate DNS zone.
If this process fails, the Installation Wizard offers to install the
DNS Server on the domain controller and create the appropriate zones
so the critical information related to Active Directory can be added
and will be present in DNS.

If your organization already has a domain controller or two set up,
it's possible that those domain controllers are
running the DNS server and that some zones have already been created.
If that's the case, you won't need
to follow all the steps in the rest of the chapter: you
won't need to create your zones, but
you'll still need to add information about your
hosts to DNS. Just be aware that as you take a look at
what's in your zones, you might find that extra
information related to Active Directory.

We're going to talk a lot more about Active
Directory and how it uses DNS in Chapter 8, but
it's not too early to highlight the close
relationship between Active Directory and DNS.