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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.

Security & Identity (IAM)

To perform certain actions described below, you must either be the Owner of the Organization in which the actions will be performed, or an IAM user with the necessary permissions.

Requirements
  • You have an account and are logged into the Scaleway console
  • You have configured your SSH key
  • You have created and installed an Elastic Metal server
  • You have configured a flexible IP address on the 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.
    Note

    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.
    Important

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

Note

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 IPv6 on virtual machinesHow to use Private Networks
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