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How to configure reverse DNS of an Instance
Published on 26 May 2021
Reverse DNS is the opposite of classic “forward” DNS and maps an IP address to a hostname. This can be useful if, for example, you want to send emails from your server.
Security & Identity (IAM):
You may need certain IAM permissions to carry out some actions described on this page. This means:
- you are the Owner of the Scaleway Organization in which the actions will be carried out, or
- you are an IAM user of the Organization, with a policy granting you the necessary permission sets
If you are using the default reverse DNS (*.pub.instances.scw.cloud), you may experience problems with deliverability of your emails and during the subscription of certain tools like Junk Mail Reporting Program (JMRP) and Smart Network Data Services (SNDS) - services provided by Microsoft to whitelist your IP’s on their email servers.
- You have an account and are logged into console.scaleway.com
- You have created an Instance and have not detached its public (flexible) IP address
- You have configured a matching
A-recordpointing to your IP address. Note that if you have created the A record recently, it may take up to 24 hours for the operation to be completed.
How to set up a reverse DNS record
- Click Instances in the Compute section of the side menu. The Instances page displays.
- Click the Flexible IPs tab.
- Click «See more Icon» next to the IP address you wish to configure reverse DNS for, and select Edit reverse from the drop-down menu.
- Enter the reverse DNS you want to associate with the IP address. Generally this corresponds to your hostname.
- Click Edit reverse to finish.
Once the reverse DNS has been updated, it may take up to 24 hours before it is fully propagated.