What is DNS?

DNS (Domain Name System) functions as the internet's phonebook. When a user enters a domain name into their browser (e.g., example.com), DNS translates that human-readable domain into the corresponding machine-readable IP address that identifies the actual web server (e.g., 192.0.2.1). This process enables users to access websites using easy-to-remember names instead of numerical IP addresses.

DNS is a foundational part of how the internet works. Without DNS, users would be required to remember complex IP addresses to reach websites. For a deeper understanding of DNS and how it works behind the scenes, refer to this guide by Verisign.

DNS Records

DNS Records (Domain Name System Records) are stored instructions that define how a domain should behave. These records are managed through DNS servers and play a critical role in directing internet traffic. Each record type serves a unique function, such as routing web traffic, handling email delivery, or verifying ownership of a domain.

There are many types of DNS records, but for most website configurations - including integration with vMaxGuard - the most commonly used are A and CNAME records. To learn more about DNS record types and their functions, visit IBM's DNS Records Overview.

For vMaxGuard configuration, you will be mostly using either A or CNAME records to configure your website:

CNAME Record (Canonical Name Record)

A type of DNS entry that tells your subdomain (e.g., www.yourdomain.com) to point to another domain - in this case, our CDN endpoint.

A Record (Address Record)

The record that connects your domain directly to an IP address of your application server (e.g., google.com → 172.217.26.78). It's commonly used for root domains.