How A DNS Firewall Adds An Extra Layer Of Computer Security To An Enterprise

Posted by B. Hale

The DNS (Domain Name System) is what powers the internet as we know it today. Devices on the web reference to each other using a unique set of numbers known as IP addresses. The same way it’s virtually impossible for you to memorize each of your friends’ mobile number, remembering IP addresses is impossible. Network devices use IP addresses to communicate and access resources on the network.

On the other hand, it’s easier to memorize human-readable hostname, creating a need for a system that converts human-readable hostnames into IP addresses. A computer on the internet that does the work of resolving host names into IP addresses is known as a DNS server.

DNS firewall
Since all the queries on the internet are DNS in nature, whether it’s a simple image search, communicating on chat with another person or sending an email, there is a significant need for DNS that resolves this queries into IP addresses. DNS servers are the Internet registry that contains hostnames and translates them into machine-readable IP addresses. The information provided in the domain name system servers across the web is housed centrally on a server called the Central Registry.

With this critical role that DNS servers play, they need to be secured from malware and phishing attacks to your network. A DNS firewall ensures an enterprise’s Domain Name System Servers from malware and phishing attacks.

How does a DNS firewall work?
DNS resolvers act as the wall that protects an enterprise’s network resources. This firewall prevents connections to a list of already known dangerous locations on the internet. It also has a way of messaging the industry security personnel on potential security threats on the network such as botnets and APTs.

The procedure of setting up this level of security in an enterprise involves purchasing a secure DNS resolver and configuring it with the latest list of dangerous hostnames. By doing this, a company ensures that there is an added layer of security on top the traditional firewall ensuring that enterprise resources such as customer information and proprietary information are not compromised.

Why is a DNS firewall vital to an enterprise?
A secure DNS resolver is a link between a business and the outside world which is the vast web. If the resolver allows a user to access a malicious location, then a lot is at stake. Such communication can lead to attack or malware which will interrupt normal communication and result in loss of customer data or proprietary information.

Without a DNS firewall, malware will easily get into an enterprise’s system causing severe service interruptions and damage. Computer security in an organization is not absolute rather it is a goal which the business strives at reaching. If you would like to learn more, visit www.bluecatnetworks.com.