Understanding and configuration of the regions

Provides DNS servers DNS namespace to be divided into zones that store information about the name of one or more DNS domains. The region become a reliable source for information about each analysis the domain name listed in this area. This lesson introduces you to the DNS zones and how they are configured.

Areas

DNS servers provide the option of dividing the area into one or more areas, which can then be stored, distributed, and replicated to DNS servers other. Namespace DNS is a logical structure of your network resources, and to provide DNS zones physical storage of these resources.

Planning Area 3

When deciding whether or not to divide the area of the DNS to make your additional areas, and to consider the following reasons for the use of additional areas: • Is there a need to delegate management of the DNS your part of the area to another location or department within your organization? • Is there a need to divide one large area to a smaller area for the distribution of traffic loads among multiple servers, improving performance DNS name resolution, or create more error-tolerant system environment domain names? • Is there a need to expand the space by adding several sub-areas at the same time, such as to accommodate the opening of a new branch or site.

Additional areas

If you can answer "yes" and one of these issues, it may be useful to add or restructure your space in additional areas. When choosing how to structure areas, you must use the plan that meets the needs of your organization. There are two types of search area: a forward lookup zones and reverse lookup zones.

Forward Lookup Zones

There is a forward lookup zone allows to forward queries the search. The name servers, you must configure at least one forward lookup zone for the DNS service to work. When you install Active Directory using the Active Directory Installation Wizard allows the wizard to install and configure a DNS server, the wizard automatically creates the forward lookup zone on the basis of analysis of the name you specified for the server.

Establishment of a new forward lookup

1. Click Start, point to Programs, point to Administrative Tools, and then click DNS. 2. Expand the scope of the DNS server. 3. Right-click Forward Lookup Zone folder and then click New Zone. In the New Zone Wizard guides you through the process of establishing an area of research forward. The wizard presents the following configuration options: the type of area, the name of the region, the zone file, and a Masters in DNS servers.

The type of area

There are three types of areas you can configure: • Active Directory-integrated. Active Directory-integrated zone is a major new version in the region. Region uses Active Directory to store and copy the zone files. • the fundamental criterion. The basic criterion is the master copy of the new storage area in a text file record. The management and preservation of the region in the first place on the computer that you are creating the region. • Standard secondary. There is a standard secondary zone is a replica of the Qaim area. Secondary zones of the read-only and is stored in standard text files. Primary zone must be configured to create a secondary zone. When you create a secondary zone, you must specify the DNS server, called the main server, which will be the transfer of information in the region to the name of the server that contains the level of the secondary zone. You create a secondary zone to provide redundancy and to reduce the load on the server that contains the name of the master file for the database area.

The benefits of Active Directory-integrated zones

In the level of the storage model, DNS updates take place on the basis of one update the main form. In this model, one authoritative DNS server for the area described as the main source of the region. This server maintains the master copy in the region, in a local file. With this model, the root server for the region represents one fixed point of failure. If this server is not available, and update the DNS requests from clients are not processed for the region.

Integrated Storage Guide

With the directory stored in an integrated and dynamic updates to DNS are conducted based on the model update multimaster. In this model, any authoritative DNS server (such as a domain controller running DNS servers) is described as the main source of the region. Because the master copy in the region is to maintain the Active Directory database, which is fully replicated to all domain controllers, this region can be updated by DNS servers on any domain controller in the domain. Multimaster update model with Active Directory, any of the servers main directory-integrated zone, and can handle requests from clients to the DNS zone update for as long as the domain controller is available and can be accessed on the web.

When you use Directory-integrated zones

You can use the access control list (ACL) editor to provide access to the region either granules or a specific resource record in the region. For example, the ACL for a specific domain name in the limited dynamic updates so that only allowed clients to the DNS-specific or to authorize only a secure, such as domain administrators with permissions to complete the region or standard features for that. This security feature is not available with standard primary zones.

Replicated regions

Zones are replicated to synchronize new domain controllers automatically whenever a new zone is added to the Active Directory domain. Although the DNS server can be selectively removed from the domain controller, directory-integrated zones are already stored on each domain controller, so the storage and management is not additional resources. Also, the methods used to synchronize the directory, store the information provides better performance than the standard zone update methods, which are likely to need to move the entire region.

Spaces

When the storage space and frequency basis (for example, one of the DNS storage and backup, and another for Active Directory), and additional administrative complexity is added to the planning and design of the network, and allow for their growth at the end. By integrating DNS storage, you can consolidate storage management and replication for both DNS and Active Directory information as a single administrative entity.

Area Name

Usually, a region called the area the highest in the hierarchy to include the region, that is, in the root domain of the region. For example, the region that includes both microsoft.com and sales.microsoft.com, would be the name of the zone microsoft.com. For more information about naming the region, see Chapter 2, "Introduction to Active Directory.

Zone file

Basic criterion for the forward lookup zone type, you must specify the zone file. The zone file is the name of the database file, which defaults to the name of the region with. DNS extension. For example, if the zone name is microsoft.com, the default database is the name of the file MICROSOFT.COM.DNS. When migrating from one region from another server, you can import existing zone file. You should put the file in the \ System32 \ DNS directory on the target computer before you create a new zone, where the root notes to the Windows 2000 installation folder, usually C: \ Winnt.

DNS servers

Standard secondary forward lookup zone type must specify the DNS server (s) from which you want to copy the region. You must enter the IP address of one or more DNS servers. Reverse lookup zone enable reverse lookup queries. Reverse lookup zones are not required. However, the reverse lookup zone is required to run troubleshooting tools, such as NSLOOKUP, and to record the name instead of IP address in Internet Information Services (IIS) log files.