A firewall will control the functionality of the DNS system. It will protect all the devices attached to the server and shield it from imminent attacks. There are several devices connected to the DNS including POS systems, Smartphones, CCTV cameras among others. These devices depend on DNS to access the internet. The firewall can protect these devices from accessing unwanted malicious content over the Internet whether they are mobile or static.
The first DNS infrastructure was built without any consideration to security. This is because hostnames and IP addresses contained in the system were specifically used for communication. As more applications using IP addresses emerged, the access to internet grew and hostnames using IP addresses was disallowed. This contributed to the lack of security within the DNS.
Another factor that leads to DNS weakness is that it was initially made to be accessed by the public to the internet. This means that the public can consult data passing over the web. A new technology to protect the DNS using a firewall is necessary to curb hacking attack effects.