What is a DNS Firewall and why should you use it?

What is a DNS Firewall and why should you use it?

Posted by Brew City on April,25 2017

The technology world is too extensive and interesting field to study and practice. Computers are manmade but work almost similar to a human brain but in a whole new way. Computers and network systems e.g. websites operate using numbers, and anything to do with numbers may not be everyone's cup of tea. For example, a website is known by its Internet Protocol number (IP) which is unique as it shares it with no other website.

In a network, there is the DNS, standing for Domain Name System. This is in charge of matching the name of a website to the numbers that the website represents. This literary means that if you want to search a site by the name, the DNS would search and identify with a website called 12.234.567.890 then present it to you. These numbers do not follow a uniform sequence that a human being can track or even easily remember.

Every device such as computers, phones, and websites that connect to the internet use DNS. Therefore, hackers are attracted to it whenever they want to cause harm to a website or computer. However, one can still be able to control their DNS name resolution for their websites and filter what they do not want or potentially harmful elements to your device or website. The process is called DNS filtering. DNS filtering can be done regardless of the internet service provider you are using.

What DNS Firewall Does

This firewall, on the other hand, is a security wall that when turned on, helps to stop your systems from communicating with external sources on the network that are potentially harmful. It does this by continuously updating all those IP addresses and domains that are being used by harmful systems that target the networks. The DNS firewall will continuously monitor, block the harmful traffic or/and direct them to safe locations.

The Benefits of Using a DNS firewall

The benefits of using DNS firewall for your enterprise is that it neutralizes malware ability to do risky stuff such as calling home. It also prevents it from destroying data on your network and neutralizes threats that have bypassed your security layers on the network. An administrator also benefits from the advanced reporting by the DNS firewall on DNS queries that have been blocked.

It at the same time indicates the threat affected machines. This, therefore, allows for an immediate decision and solution to be reached at before great damage is caused. As technology advances, hackers also improve their skills or change their hacking tactics. However, with a good firewall, you will be able to block the hacker's activities such as phishing, botnets, typo-squats malvertising and more.


If you are oriented for the best cyber security, acquiring a DNS firewall is inevitable, and at the end, you will be glad for that decision. You can learn more at, which has additional information and resources available.