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DNS Services

Topics

Introduction

DNS is an internet directory service that allows easy navigation of the internet. By using DNS one can access services like a website easier by typing a common name such as http://www.primusdatacentre.com.au instead of the actual IP address of the website http://210.50.7.1 which would be cumbersome and hard for an individual to remember.

The Domain name system can be very complex and involved but if one owns a domain name there are only a few things that one needs to know about it.

Who is my domain name registrar (from where was the domain name bought)
Who currently hosts my domain name (which server contains details of my domain?)
Where is my host entry for www.mydomain entry (a record) pointing? (Where is my website?)
Where is my MX record pointing to? (To what server is my mail being sent?)

Who is my domain name registor

This is the componey from which the domain name was origonaly purchsed. This will be a domain name registor such as Plannet Domain or Melbourne IT. The registors website will generaly allow you to do the folloing.

Change nameserver delegation This changes the internet addres of the server that holds all you DNS information such as wour website address

Renew your domain name In gerneral a domain name will only be issued for a fixed period of time and the site will normaly allow you to renew you domain name and pay for the renewal online

How to find out about your domain name

Go to the following site http://www.planetdomain.com/newdnr/whois/search.jsp

Enter the domainname that you are trying to find information on into the search for box and click on the search button. In this example primusdatacente.com.au was used. Also make sure that you dont add www to your domain name.

A result similar to the one below will then be displayed. Note that in this example areas of intrest have been highlighted in blue.

WhoIs Results

Your query was "primusdatacentre.com.au"
Domain ROID: D0189613-AR
Domain Name: primusdatacentre.com.au
Last Modified: Never Updated
Registrar ID: R00014-AR
Registrar Name: PlanetDomain
Status: ok

Registrant: Primus Telecom
Registrant ID: OTHER 77 061 754 943

Registrant ROID: C0568837-AR
Registrant Contact Name: THE MANAGER
Registrant Email: mhoward@primustel.com.au

Tech ID: C0568839-AR
Tech Name: Matt Howard
Tech Email: mhoward@primustel.com.au

Name Server: ns1.primusdatacentre.com.au
Name Server IP: 210.50.3.84
Name Server: ns2.primusdatacentre.com.au
Name Server IP: 210.50.3.100

Domain name: this is the domain that the search was performed
Registrar Name: This is the name of the place where the domain name was bought
Name Server: These are the servers that contain all the infomayion about your domain such as where your webserver or mail server are located on the internet.

Name server records

Your name server will contain two records of intrest; the MX and A record.

MX record: This is the mail server record and and it list the mail server for you internet domain. It should also be noted that there can be mutiple MX records for an internet domain and each MX record also has a number asocated with it. The MX record with the lowest number is the mail server of choice with the others being backups if the other mail server is down.

A record: This is also known as a host record and is the type of record used for the WWW record. This record is used to point the WWW record at ones webserver.