16.3.0.122.in-addr.arpa. IN PTR name.net
Here as you see the IP Address is reversed and added with in-addr.arpa
and this has come to the left side while the actual domain name
has gone to right side of IN PTR.
This is mostly used as a security and an anti-spam measure
wherein most of the webservers or the email servers do a reverse
DNS lookup to check if the host is actually coming from where it
claims to come from. It is always advisable to have a proper
reverse DNS record (PTR) is been setup for your servers
especially when you are running a mail / smtp server
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DNS Records Explained with Syntax and examples, DNS Records Tutorials lements reverse DNS lookup for that address. For
example www.name.net has the IP address 122.0.3.16, but a PTR
record maps 16.3.0.122.in-addr.arpa.
Example of PTR Record with syntax
<span>16.3.0.122.in-addr.arpa. IN PTR name.net
Here as you see the IP Address is reversed and added with in-addr.arpa
and this has come to the left side while the actual domain name
has gone to right side of IN PTR.
This is mostly used as a security and an anti-spam measure
wherein most of the webservers or the email servers do a reverse
DNS lookup to check if the host is actually coming from where it
claims to come from. It is always advisable to have a proper
reverse DNS record (PTR) is been setup for your servers
especially when you are running a mail / smtp server.
NS Record
An NS record or name server record maps a domain name to a list
of DNS servers authoritative for that domain. Delegations d Summary
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