How to configure the reverse DNS of a flexible IP on Elastic Metal servers

Reviewed on August 19, 2025

Reverse DNS (rDNS) is the opposite of classic forward DNS, mapping an IP address to a hostname. This is particularly useful for tasks such as sending emails from your Elastic Metal server.

Before you start

To complete the actions presented below, you must have:

• A Scaleway account logged into the console
• Owner status or IAM permissions allowing you to perform actions in the intended Organization
• An SSH key
• An installed Elastic Metal server
• A flexible IP address attached to your Elastic Metal server

1. Click Elastic Metal in the Bare Metal section of the Scaleway console side menu. The Elastic Metal dashboard displays.
2. Click the Flexible IPs tab to display the list of your failover IPs for Elastic Metal servers.
3. Click More (more icon) next to the flexible IP you want to configure. The configuration menu for the flexible IP displays.
4. Click More info to see detailed information about the IP address.
5. Scroll down to the Reverse section and click Add reverse to add or edit the reverse DNS of the failover IP.
   Note

   If a reverse DNS is already set on your failover IP, the button will be labeled Edit reverse.

6. Enter the new reverse DNS and click Edit reverse to validate the changes.
   Important

   When configuring the reverse DNS for a flexible IPv6, the configuration applies to the first IP (XXXX:0) of the /64 IP block.