The
Global Names zone was introduced with Windows 2008, and support for this zone
continues in Windows Server 2012. The Global Names zone contains single-label
names that are unique across an entire forest. This eliminates the need to use
the NetBIOS-based WINS to provide support for single-label names. Global Names
zones provide single-label name resolution for large enterprise networks that
do not deploy WINS and that have multiple DNS domain environments. Global Names
zones are created manually and do not support dynamic record registration.
When
clients try to resolve short names, they append their DNS domain name
automatically. Depending on the configuration, they also try to find the name
in upper-level domain name, or work through their name suffix list. Therefore,
short names are primarily resolved in the same domain.
You
use a Global Names zone to provide a short name to multiple DNS suffixes. For
example, if an organization supports two DNS domains, such as adatum.com and
contoso.com, and they have a server called intranet in contoso.com, only
contoso domain users would be able to query it using the short name. Users of
the adatum domain would not be able to use the short name to access the server.
Global
names are based on creating alias (CNAME) resource records in a special forward
lookup zone that uses single names to point to FQDNs. For example, Global Names
zones would enable clients in both the adatum.com domain and the contoso.com
domain to use a single label name, such as intranet, to locate a server whose
FQDN is intranet.contoso.com without having to use the FQDN.
Creating
a Global Names Zone
To
create a Global Names zone, do the following:
1. Use the dnscmd tool to enable
Global Names zones support.
2. Create a new forward lookup zone
named Global Names (not case sensitive). Do not allow dynamic updates for this
zone.
3.
Manually create CNAME records that point to records that already exist in the
other zones that are hosted on your DNS servers.
For
example, you could create a CNAME record in the Global Names zone named Data
that points to Data.contoso.com. This enables clients from any DNS domain in
the organization to find this server by the single label name of Data.
You can also use the
Windows PowerShell cmdlets Get-DnsServerGlobalNameZone and Set-
DnsServerGlobalNameZone to configure Global Names zones.
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