How to create a DNS reverse lookup zone in Windows Server 2008
What exactly is a reverse lookup zone? Name resolution that is the opposite of the standard forward DNS query. Most of the time, the DNS is queried with a domain name to return the host's IP address. With reverse DNS, also called inverse DNS and reverse mapping, the DNS system is sent an IP address, and the domain name is returned. Reverse DNS is used to log incoming traffic by domain name for statistical purposes. It is also used to prevent spam by determining if the e-mail message is coming from the domain name indicated in the message header. Reverse DNS is an option and not mandatory in a DNS server.
Create a reverse lookup zone on your DNS Server by doing the following:
- In Server Manager expand the tree in the left window and then right click Reverse Lookup Zones and choose New Zone as illustrated in the diagram below.
- When the New Zone Wizard launches click Next
- When the zone type window launches select Primary zone and if you have Active Directory installed place a checkmark in the box labelled Store the zone in Active Directory and then click Next.
- In the Active Directory Zone Replication Scope window select To all domain controllers in this domain and then click Next.
- In the Reverse Lookup Zone Name window select IPv4 Reverse Lookup Zone and then click Next.
- In the next window type your network address in the Network ID box, which is the first 3 octets of your IP address. For example type in 192.168.8 and then click Next as illustrated in the diagram below.
- In the Dynamic Update window select Allow only secure updates and then click Next.
- Congratulations, you have successfully added a reverse lookup zone to your Windows Server. You should now add records to the zone or ensure that records are updated dynamically.