Configure Your Linode for Reverse DNS (rDNS)

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Configure Your Linode for Reverse DNS (rDNS)

Computers uses DNS to determine the IP address associated with a domain name. Reverse DNS lookup does the opposite by resolving an IP address to a designated domain name. You should always set the reverse DNS, even if your Linode hosts more than one domain.

Reverse DNS uses a pointer record (PTR) to match an IP address with a domain or subdomain. PTR records are generally set with a hosting provider, so reverse DNS is set in the Linode Manager.

Before setting the reverse DNS for your Linode, configure your domain zone and DNS records through Linode’s DNS Manager. See our Introduction to DNS Records and Common DNS Configurations guides for more information about PTR and DNS.

Setting Reverse DNS

  1. Select the Linode you wish to set up reverse DNS for from your Linodes tab.
  2. Click the Remote Access tab.
  3. Select the Reverse DNS link:

    The Reverse DNS link

  4. Enter your Linode’s fully qualified domain name in the Hostname field:

    Adding the domain name for reverse DNS

  5. Click Look up. A message will appear indicating that a match has been found for both your IPv4 and IPv6 addresses:

    Reverse DNS Match found

  6. Click Yes beneath the desired address. Note that you can select only one address at a time. If you want to set up reverse DNS for both the IPv4 and IPv6 addresses, you can perform another lookup and select the other address.

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This guide is published under a CC BY-ND 4.0 license.