August 19, 2022

Reverse DNS: Everything you need to know

Reverse DNS – what does it mean?

Reverse DNS, or simply rDNS, is a mechanism for translating an IP address into its matching domain name. Compared to the standard Forward DNS lookup, which resolves the domain name to its IP address, it serves the exact opposite purpose.

You can use it to establish that a specific IP address corresponds to a particular domain name. One of the most common reasons for using it is establishing trust in email servers. They use Reverse DNS lookups to make sure the email came from a legitimate source and isn’t a hoax.


What is a Recursive DNS server?

If it’s about the domain name system (DNS), there is a lot to be said. It’s not simple stuff. A lot of processes and components are meshing to make the big system work efficiently.

When you dig behind everything needed for the Internet to run, every click gets a very different dimension. It’s not just a finger-clicking but whole machinery moving to get your website for the potential clients that request it.

Domain name system (DNS) is what makes possible that simplicity for users. But for the magic to happen, different elements are a must, like recursive DNS servers.