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DNS Server

 

Domain name system  translates domain names into ip address. The Internet however, is really based on IP addresses. Every time you use a domain name, DNS service must translate the name into the corresponding IP address.

Go to command prompt ->  type command

Example

C:> nslookup systemadministrator.in [ See the result it resolves the ip address  of systemadministrator.in].

Protocol Details

DNS primarily uses UDP on port 53  to serve requests. TCP comes into play only when the response data size exceeds 512 bytes.

Types of DNS records

SOA        –               Defines start of authority
NS          –               Specifies a name server
A            –               Associates names with IP addresses
PTR        –               Points an IP address to a name
MX         –               Specifies mail exchanger

Client-side DNS

Client requires an ip address

Client machine requests a lookup via a request on port 53

Go to local area network properties => Internet protocol => properties => type preferred DNS.

How do I install and configure Windows Server 2003 DNS server?

The Domain Name System (DNS) is the Active Directory locator in Windows 2000 and Windows Server 2003. Active Directory clients and client tools use DNS to locate domain controllers for administration and logon. You must have aDNS server installed and configured for Active Directory and the associated client software to function correctly. This article guides you through the required DNS configuration.

  • Click Start, point to Settings, and then click Control Panel.

  • Double-click Add/Remove Programs.

  • Click Add and Remove Windows Components.

  • The Windows Components Wizard starts. Click Next.

  • Click Networking Services, and then click Details.

  • Click to select the Domain Name System (DNS) check box, and then click OK.
     
  • Click OK to start server Setup. The DNS server and tool files are copied to your computer.

Configure the DNS Server Using DNS Manager

  • Click Start, point to Programs, point to Administrative Tools, and then click DNS Manager. You see two zones under your computer name: Forward Lookup Zone and Reverse Lookup Zone.

  • The DNS Server Configuration Wizard starts. Click Next.

Forward zone definitions

At the end of the three default zone definitions, add the following. forward lookup zone definition: The forward zone definition file that this references is used for resolving the client supplied DNS name to an IP address.

Example:  C:> nslookup <domain name>

Reverse zone definitions

The reverse zone definition is the partner to the forward lookup definition and is used to resolve client supplied IP addresses to their respective domain name. The following is the reverse lookup partner to the “domain.org” forward lookup definition that was defined above.

Example:  C:> nslookup  <ip address>

Tools for deploying DNS

Netdiag.exe : The Netdiag.exe tool assists you in isolating networking and connectivity problems. Netdiag.exe performs a series of tests that you can use to determine the state of your network client.

Nslookup.exe : You can use the Nslookup.exe command-line tool to perform query testing of the DNS domain namespace and to diagnose problems with DNS servers.

Dnscmd.exe : You can use the Dnscmd.exe command-line tool to perform administrative tasks on the DNS server the same as you can by using the DNS Microsoft Management Console.

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