Книга: Windows Server 2012 R2 Storage, Security, & Networking Pocket Consultant

Installing DNS servers

You can configure any Windows Server 2012 R2 system as a DNS server. Four types of DNS servers are available:

? Active Directory-integrated primary server A DNS server that’s fully integrated with Active Directory. All DNS data is stored directly in Active Directory.

? Primary server The main DNS server for a domain that is partially integrated with Active Directory. This server stores a master copy of DNS records and the domain’s configuration files. These files are stored as text files with the.dns extension.

? Secondary server A DNS server that provides backup services for the domain. This server stores a copy of DNS records obtained from a primary server and relies on zone transfers for updates. Secondary servers obtain their DNS information from a primary server when they are started, and they maintain this information until the information is refreshed or expired.

? Forwarding-only server A server that caches DNS information after lookups and always passes requests to other servers. These servers maintain DNS information until it’s refreshed or expired or until the server is restarted. Unlike secondary servers, forwarding-only servers don’t request full copies of a zone’s database files. This means that when you start a forwarding-only server, its database contains no information.

Before you configure a DNS server, you must install the DNS Server service. Then you can configure the server to provide integrated, primary, secondary, or forwarding-only DNS services.

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