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In standard DNS queries, a domain name will resolve to an IP address. Reverse DNS is the opposite of this, resolving IP addresses to a domain name.

Reverse DNS can be used to log web traffic by domain name for site statistics, or prevent SPAM by verifying that an e-mail was truly sent from the domain name listed in the e-mail header.

To test Reverse DNS, from command prompt on a windows machine:

Click Start -> Run…type cmd and press Enter. Then use below command:

nslookup IPaddressoftheserver

It will let you know the hostname pointed to the IP.

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