To match an IP address with a domain or subdomain, Linode reverse DNS employs a pointer record (PTR).

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Let us take a look at Reverse DNS Linode in detail

Reverse DNS Linode

Computers employ DNS to determine the IP address associated with a domain name. In reverse DNS lookup, an IP address is resolved to a specific domain name. Even if their Linode hosts multiple domains, users should always configure reverse DNS. But before beginning, the user must ensure to configure up the domain zone that it is resolving to the IP address.

Setting Up Reverse DNS

1. Firstly to access a list of all of Linodes, the user have to click on the Linodes link in the sidebar.
2. Select the Linode for which the user wants to configure reverse DNS. After this, they have to go to the Network tab.
3. After that, locate the IP address for which the user wishes to configure reverse DNS, and then click the Edit rDNS(reverse DNS) button. On smaller screen sizes, this may be available in the more options ellipsis menu.
4. The user must enter their Linode’s fully qualified domain name in the Edit Reverse DNS form. After that press the Save button. The user can safely remove or replace the  x.ip.linodeusercontent.com’s default value.

   If the user wants to remove the previously configured reverse DNS value without setting a new value, then they just have to leave the field blank. Furthermore, if the user did not previously set up an A record for their domain that corresponds to their Linode’s IP address, they will receive the following error: We were unable to perform a lookup for ‘example.com’ at this time. The user may also receive an error if they have recently created their A record, as DNS changes can take some time to propagate.
5. The domain name should now be listed in the Reverse DNS column for the user.

   If the user wants to set up reverse DNS for both IPv4 and IPv6 addresses, they can follow the same steps.

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Conclusion

To conclude setting up Linode Reverse DNS is easy. It is the exact opposite of DNS which the computer’s employee to determine the IP address with a domain name.