What is DNS Blocking?

DNS blocking is a method used by commercial Internet filters to prevent Internet users visiting malicious websites. It works by comparing IP addresses against those assigned to websites known to be harboring web-borne threats – such as malware and ransomware – and stops devices connecting with them when a match is found.

Because DNS blocking is based on comparisons between IP addresses, rather than between alphanumeric domain names, the process is quick – in most cases imperceptible. Therefore, organizations using an Internet filter with DNS blocking to control access to online content do not have to compromise efficiency for security.

The Secondary Advantage of DNS Blocking

The secondary advantage of DNS blocking is that comparisons against Acceptable Use Policies are equally as quick – enabling system administrators to apply as many policies as necessary without creating latency within the filtering process. Because of this, organizations using an Internet filter with DNS blocking have the option of applying a wide-range of granular policies. For example:

  • Companies can prevent everybody except marketing personnel accessing social media platforms, and create an exception for lunch breaks.
  • Retail businesses and hotels can implement a watershed for adult content in order to create a family-friendly environment during the day.
  • School districts can apply policies that control access to online content by grade or by subject, with specific teachers given authority to override policies.

Both the primary and secondary advantages of DNS blocking create a better user experience. As well as organizations being protected against malware and ransomware, individual users are protected against phishing and spyware. Productivity is improved; and company employees, hotel guests, and school children are protected against being exposed to inappropriate content.

Setting Up an Internet Filter with DNS Blocking

The quickest and easiest way to set up an Internet filter with DNS blocking is to subscribe to a cloud-based service and redirect your Domain Name Server to the service provider´s IP address. This is far simpler than installing hardware or software, and it also has the advantage of minimizing your maintenance overhead, as keeping the filter´s software up-to-date is service provider´s responsibility.

How DNS Filtering WorksA further advantage a cloud-based service is that it is infinitely scalable. You can increase the number of users and devices being protected as your company grows, as your retail business becomes more popular, or your school district expands. Conversely, you can reduce the number of protected users and devices if necessary, and avoid the scenario in which you are paying for capacity you are not using.

Cloud-based Internet filters with DNS blocking are also easy to manage. System administrators can log into their service from any Internet-connected device, and apply or adjust policies for any user(s) within their network. It is also possible to grant temporary exemptions to filtering policies through the use of Cloud Keys, or delegate a limited amount of administrative responsibility via role-based access controls.

Try an Internet Filter with DNS Blocking for Free

If you have a responsibility for online security, and you are interested in how DNS blocking can benefit your organization, do not hesitate to get in touch and speak with one of our Sales Technicians. Our Sales technicians will be happy to discuss your existing security mechanisms and answer any questions you have, and will invite you to try a WebTitan Cloud Internet filter with DNS blocking free of charge.

Our free trial gives you the opportunity to evaluate WebTitan Cloud in your own environment, try different filter settings, and review the outcomes via WebTitan Cloud´s extensive reporting suite. Not only will you be better protecting your online environment against web-borne threats, but you will also be providing your users with a better browsing experience. Contact us today, and you could be starting your free trial of WebTitan Cloud within fifteen minutes.