In our previous article we learned how to configure DNS. As we all know that DNS (Domain Name System) is destined to maintain al the servers and web applications hosted in the organization. If you see closely DNS can be divided in to more than one domain as per the business requirement. You can also divide your DNS in to one or more zone to store name and address of computers or Web applications. A zone on DNS is an authoritative source for information about each entry in that zone. The 2 important zones are Forward lookup Zone and Reverse lookup Zone.
Get SharePoint Online (Office 365 Enterprise E3) Subscription for your Business NOW
SharePoint 2016 Tutorial Contents
Why we need to know Forward and Reverse lookup Zones in DNS?
In SharePoint-2013 we can create web application with custom URL using “Host Header “option. As soon as you create a web application using host header SharePoint admin has to request the domain controller admin to add the URL in Forward Lookup zone.
You can’t access the site collections in that web application without this entry.
Let us learn how to create and configure these 2 zones.
Configure the Forward Lookup Zone:
Step 1: Log on to Domain controller server and open DNS as part of tools in Server Manager
Step 2: Expand the DNS server to configure Forward Lookup Zone.
Step 3: Select the forward Lookup zone and click on New Zone option
Step 4: Select the Primary zone and click on Next.
Step 5: Follow the below screens to complete the configuration.
Step 6: Now you should be able to see the new host added in Forward lookup Zone.
Configuring the Reverse Lookup Zone:
Step 1: Select the Reverse Lookup Zone and click on New Zone option
Follow the below screen shots to configure the reverse Lookup Zone.
After the above step click on finish in the configuration wizard.
Now add the pointer in Reverse Lookup Zone.
Click on browse to select the host name to create the pointer.
Once you configure the Forward and Reverse Lookup zones you can test them with the below approach:
In the above example we are resolving the details in 3 different ways to ensure that Forward and Reverse lookup zones are working seamlessly.
– nslookup with only hostname
– nslookup with fully qualified name
– nslookup with IP Address as well
If you notice closely we got the same result set as output, this ensures that zones got configured accurately.
Hope this helps, happy administration in SharePoint !!!!