Common DNS Configurations

Updated by Linode Written by Linode

Contribute on GitHub

Report an Issue | View File | Edit File

Common DNS Configurations

Set Up a Domain

The most common DNS configuration is a single domain name on a single Linode. For this, you’ll need to add SOA and NS records for all of your name servers, and A/AAAA records for your domain names. Use the screenshot below as a guide.

The SOA record is set to "example-site-demo.com". The NS records are set to "ns1.linode.com" through "ns5.linode.com", inclusive. The MX record is set to "mail.example-site-demo.com". There are A records for [blank], which is the primary domain, and the "mail" and "www" subdomains. They are all set to the same IP.

Note
The Domains section of the Cloud Manager can automatically add all of these records when you create a domain. For instructions, see the Add a Domain section of the DNS Manager guide.

Configure Subdomains

  1. To configure a subdomain (e.g. staging.example-site-demo.com), create an A record with the subdomain’s hostname. Click Add an A/AAA Record:

    Create a new A record by first click on "Add an A/AAA Record"

  2. Add the subdomain under the Hostname field. Assign the IP address of the server you want to host the subdomain:

    Create a new A record, following the instructions in the "Adding" section. Add the subdomain text to the "Hostname" field. For example, you could type "staging" - NOT "staging.example-site-demo.com".

  3. Click on the Save button to create the record.

    Multi-level Subdomains

    The Linode Cloud Manager does not support adding a subdomain of a subdomain in the same domain zone. For example, if you have example.com as a domain with an A record for staging.example.com, you cannot create test.staging.example.com within that same domain zone. Instead, create a separate domain zone for the subdomain staging.example.com. Then, add an A record for test.staging.example.com to that new zone.

    See the subdomains section of the DNS manager guide for more information.

Host Multiple Domains on a Single Server

To host multiple domain names on a single server, create a separate domain entry for each domain name as shown below. When creating the new domain entry, we recommend that you allow the Domains section of the Cloud Manager to automatically insert basic records. At a minimum, you’ll need an A record for each domain name pointing to the server’s IP address.

This page shows the Domains page with three different domain zones listed.

Use One Domain on Multiple Servers

If you have more than one server, but only one domain name, you can point A records with server-specific hostnames to all servers that need domain names. One machine will be the “front end” for the domain, by virtue of the first-level domain’s A record pointing to it, but the domain can serve as a proxy for services provided by other machines, if needed. For example, if you wanted to create a development environment on another server, you could create an A record for staging.example.com and point it at another Linode’s IP address.

Route Email to Third-Party Mail Services

To route email to a third-party email service, create MX records that associate your mail server (for example, mail.example-site-demo.com) with a hostname provided by the third-party service. For more detailed instructions, see the website of your third-party email service.

Use Wildcard DNS Records

A wildcard DNS record matches requests for non-existent domain names. For example, if you create an A record for *.example.com, and a user visits nonexistantname.example.com, that user will be redirected to example.com. An example wildcard DNS record is shown below.

Create a new A record, following the instructions in the "Adding" section. Add a single asterisk (\*) in the "Hostname" field. Set your IP address in the "IP Address" field. Then click the "Save Changes" button.

Join our Community

Find answers, ask questions, and help others.

comments powered by Disqus

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