Set a PTR record so a Vultr instance's IPv4 or IPv6 address resolves to your FQDN. Changes take 6 to 12 hours.
Reverse DNS (rDNS) maps an IP address to a hostname using a PTR record, performing the opposite of a standard DNS lookup. Configuring rDNS allows services and monitoring tools to resolve your server's IP back to a fully qualified domain name (FQDN). Proper rDNS improves email deliverability, aids in network verification, and helps troubleshoot connectivity issues. Many services, including mail servers, rely on rDNS to verify legitimate sources, and monitoring tools use it to display human-readable hostnames.
Follow this guide to configure rDNS for Vultr instances using the Vultr Console or Vultr CLI.
rDNS changes may take 6–12 hours to propagate and become active across the DNS system.
Navigate to the Compute section under Products.
Select the instance for which you want to configure rDNS.
Click Settings, then choose IPv4 or IPv6 for which you want to set the rDNS.
Under Public Network, all your associated public IPs are listed. To update one, click the rDNS name under the Reverse DNS column.
Enter the FQDN you want to associate with your IP address.
Click the tick icon to save the rDNS record.
Run the below command to verify that the rDNS record is updated.
The command above displays the PTR record associated with your IP.
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