Why DNS matters

Resources on the Internet are easily found because of a system that converts numeric addresses to manageable names. Despite its low visibility, the Dynamic Name System (DNS) makes the online world work smoothly as people around the world use it for everything from email to e-commerce.mEveryone who manages a domain has the responsibility to add their information to the global distributed database that powers the system.

In many cases, customers allow their Internet Service Providers (ISPs) to manage their settings, so many business and personal internet users have little or no hands-on contact with the system. In fact, few people realize the importance of the DNS until a system outage or denial of service attack makes online resources inaccessible. Learning why the name system matters will help you make the right decisions when tasked with managing it for your organization.

Fighting spam

Mail servers use the Dynamic Name System to reject messages that come from invalid addresses. Relatively recent developments such as DomainKeys (DKIM) and the Sender Policy Framework (SPF) control outbound access to mail servers by allowing authorized users of your domain to send mail while denying access to outsiders.


A well-functioning DNS can protect internet users from phasing scams and other threats because the DNS ensures that the server names that you type into your web browser, email client and other applications take you to the correct destination. The system also supports real-time blacklists that help protect individual and business internet users from online threats.


Your Dynamic Name System entries supply outside users with public information about your domain. The system also allows users within your organization to use a different addresses, so your organization enjoys a basic amount of privacy. Without the distinction between internal and external addresses, anyone on the internet could have a chance to access sensitive information stored on your private network.


Enterprise networks depend on a properly configured naming system to allow business teams access to needed resources so they can be productive. Microsoft Active Directory and competing solutions complement domain name services and control access to enterprise resources, such as private clouds, while minimizing the number of requests that are routed over the public cloud.

Many servers around the world comprise the DNS, making its proper operation dependent on entities that are out of the purview of most business and individual internet users. The importance of the system is reflected by its role in making digital resources conveniently accessible while keeping users safe, private and productive. Pay careful attention to the configuration of the servers, workstations and devices that you control to make DNS work for you. If you are interested, you may do additional research at the www.bluecatnetworks.com website for more information.

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