What is Reverse DNS?

In this article, we hope to share with you the many aspects that this important subject has to offer you.

back DNS (sphere Name method) lookup, also known by the acronym (rDNS), is the manner by which superstar can look up a mass name given a particular IP address. back DNS is also known in some areas as reverse resolving. It is the contrary of DNS lookup, by which superstar looks up an IP address given a particular mass name.

Why use back DNS?

A reverse DNS lookup is mostly performed for troubleshooting purposes. regularly, tools like a traceroute or a chime will do a reverse DNS lookup to conclude the gush of travel from one face to another. Another customary place for reverse DNS lookup is when accessing a persona�s message. Many advanced message providers will do reverse DNS lookups to conclude if an message was sent from a known spam address. lastly, reverse DNS can be worn to make certainly that there is a personal relationship between the holder of a attendant and the holder of a area name. This procedure, known as cheeky definite reverse DNS (FCrDNS) is worn to put a sojourn to phishing sites and spammers.

As we take a closer look, keep in mind all of the useful and important information that we have learned so far.

What is IPv4 back DNS lookup?

IPv4 back dns is a typeface of reverse DNS that uses a reverse IN-ADDR ingress with the exclusive area �in-addr.arpa�. The IP address represented in the in-addr.arpa area is printed in reverse order to the regular way that the IP address is printed. For example, if a persona was performing a reverse area lookup for an address such as 192.168.1.1, he would do the lookup with 1.1.168.192.in-addr.arpa.

What is IPv6 back DNS lookup?

IPv6 back DNS lookup is a typeface of reverse DNS that uses the exclusive area ip6.arpa. different IPv4 back DNS lookup, IPv6 back DNS lookup does not use the average IP address type of looking up mass names. Instead, it uses a system of nibbles, or four bit aggregations, in reverse order with each number separated by a cycle. For example, if a persona was performing a reverse area lookup for an address such as 2001:0db8:0:0:0:0:1428:57ab he would do the lookup with b.a.7.5.8.2.4.1.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa.

What happens when there are manifold mass names assigned to one IP address?

A reverse DNS lookup will be able to conclude all of the mass names associated with a particular IP address, although this prepare is sometimes frowned ahead. Many shoddy web massing procedure will submit public virtual masss where many sites disclose area on the same IP address. Alalthough this does not disturb the legality of the information returned by a reverse DNS lookup, it can manage to harms with other army.

Knowing the ins and outs of this topic will help you to fully understand the importance of this entire subject.