Configure Your Linode for Reverse DNS (rDNS)
Updated by Linode Written by Linode
Your desktop computer uses DNS to determine the IP address associated with a domain name. Reverse DNS lookup does the opposite by resolving an IP address to a designated domain name. You should always set the reverse DNS, even if your Linode hosts more than one domain name.
Reverse DNS uses a PTR Record or pointer record to match the IP address with the domain or subdomain. Because PTR records are generally set with your hosting provider, when hosting on a Linode, you will always set the reverse DNS within the Linode Manager, using the method detailed below.
Setting Reverse DNS
- Select the Linode you wish to set up reverse DNS for from your Linodes tab.
- Click the Remote Access tab.
Select the Reverse DNS link:
Enter your Linode’s fully qualified domain name in the Hostname field:
Click Look up. A message appears indicating that a match has been found for both your IPv4 and IPv6 addresses:
Click Yes beneath the desired address. Note that you can select only one address at a time. If you want to set up reverse DNS for both the IPv4 and IPv6 addresses, you can perform another lookup and select the other address.
Congratulations! You have set up reverse DNS for your domain name!
This guide is published under a CC BY-ND 4.0 license.