Reverse DNS lookup and Uses of Reverse DNS lookup

Reverse DNS lookup or Reverse DNS Resolution

A reverse DNS lookup is the query of the Domain Name System to determine the Domain Name when the IP address is known. Many Domain names may be associated with a single IP address. PTR records are used to reverse resolving of an IP address.
Reverse DNS lookup
Reverse DNS lookup
reverse DNS lookup involves searching domain name registry and registrar tables. It might be used to try to identify the originator’s domain name and also be used to determine the name of the internet service provider assigned to a particular IP address. The reverse DNS database of the Internet is rooted in the .arpa domain.

Uses of Reverse DNS lookup

The most common use of reverse DNS lookup is network troubleshooting via tools like traceroute, ping, and the "Received:" trace header field for SMTP (Simple Mail Transfer Protocol) e-mail, web sites tracking users, etc.

An FCrDNS (Forward-Confirmed reverse DNS) verification can create a form of authentication showing a valid relationship between the owner of a domain name and the server's owner that has been given an IP address.  This validation is strong enough to frequently be used for whitelisting purposes, since spammers usually cannot achieve forward validation when they use zombie or bot computers to forge domain records.

Note: reverse DNS lookup and inverse lookup is different from each other.

Reverse DNS lookup and Uses of Reverse DNS lookup Reverse DNS lookup and Uses of Reverse DNS lookup Reviewed by Technowap on August 04, 2019 Rating: 5

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