Managing DNS Services

DNS management consists of the following tasks:
• Delegating DNS administration
• Configuring logging for DNS
• Aging and scavenging
• Backing up the DNS database
 
Delegating Administration of DNS
By default, the Domain Admins group has full permissions to manage all aspects of the DNS server in its home domain, and the Enterprise Admins group has full permissions to manage all aspects of all DNS servers in any domain in the forest.
Configuring DNS Logging
By default, DNS maintains a DNS server log, which you can view in the Event Viewer. This event log is located in the Applications and Services Logs folder in Event Viewer. It records common events such as:
• Starting and stopping the DNS service.
• Background loading and zone signing events.
• Changes to DNS configuration settings.
• Various warnings and error events.
Aging and Scavenging
DNS dynamic updates add resource records to the zone automatically, but in some cases, those records are not deleted automatically when they are no longer required..
Aging is determined by using parameters known as the No-refresh interval and the Refresh interval. The No-refresh interval is the period of time that the record is not eligible to be refreshed..
Backing Up the DNS Database
If your DNS zone was implemented as an Active Directory-integrated zone, then your DNS zone is included in the Active Directory database ntds.dit file. If the DNS zone is a primary zone and is not stored in AD DS, then the file is stored as a .dns file in the %SystemRoot%\System32\Dns folder.
Backing Up Active Directory-Integrated Zones
Active Directory-integrated zones are stored in AD DS and are backed up as part of a System State or a full server backup. Additionally, you can back up just the Active Directory–integrated zone by using the dnscmd command-line tool.
Backing Up Primary Zones
To back up a primary zone that is not stored in AD DS, simply copy or back up the individual zone file, zonename.dns, which is located in the %windir%\System32\DNS directory. For example, if your DNS primary zone is named Adatum.com, then the DNS zone file will be named Adatum.com.dns.

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