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DNS Server (System Services for the Windows Server 2003 Family and Windows XP Operating Systems)

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Service Name: DNS

Executable Name: dns.exe

Log On As: LocalSystem

Description: Enables DNS name resolution by answering queries and update requests for DNS names. Presence of the DNS servers is crucial for locating devices identified using DNS names and locating domain controllers in Active Directory. If there is no authoritative DNS for a particular portion of the namespace, then locating devices in that portion of the namespace will fail. Not having the authoritative DNS server for the DNS namespace used to resolve Active Directory domains results in an inability to locate the domain controllers for such domain.

If this service is stopped or disabled, DNS name or device resolution will not be reliable.

See also DNS Client, Configure Your Server, Manage Your Server.

Available on: Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition and Windows Server 2003, Web Edition.

Installed through: Add/Remove Windows Components, Networking Services; Configure Your Server, Manage Your Server.

Startup type: Automatic

Service status: Started

This service depends on the following system components:

Remote Procedure Call

AFD Networking Support Environment

TCP/IP Protocol Driver

IPSEC Driver

The following system components depend on this service: None

IP Port Numbers used:

TCP: 53, 139 (DNS ADMINISTRATION) 1024, 1043, 1067, 1068

UDP: 53, 1046, 1045

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