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

Reviewed on 22 January 2024Published on 26 May 2021

Reverse DNS, or rDNS, is exactly the opposite of classic forward DNS as we know it. Forward DNS maps a hostname to an IP address. Reverse DNS means we are mapping the IP address to a hostname. This can be very useful, especially if you want to send 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 Elastic Metal server installed
  • 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.
  3. Click «See more Icon» next to the flexible IP you want to configure. The configuration menu of 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 on Add reverse.

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

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

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


Make sure that a corresponding A-Record (IPv4) or AAAA-Record (IPv6) is pointing to the IP address exists before editing the reverse DNS of an IP address.

See also
How to configure a flexible IPv6 on a virtual machineHow to use Private Networks
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