How a DNS firewall works

Billions of people use the Internet on a daily basis to search for information, for business purposes, or even to communicate with other people. Just think about the amount of personal information stored on your PC; your pictures, your email messages, chat logs, and all your documents. What happens if the wrong persons gain access to this information? The purpose of DNS Firewall is to prevent threats to your privacy.


Where the risk lies
The information is on your computer, and you're certain you never send personal information over the Internet. Despite the precautions you may have in place, there are still numerous ways in which malicious people can invade your privacy. This is easily achieved by putting a malware, Trojan or virus on your PC.

Malwares are used by their creators to access critical information on your computer as well as using your PC to infect others. They also attack websites for profit and sending spam messages. Before understanding the precautions to take, It is important to analyze their most common ways of getting control over your PC and stealing information.

First, they can access the computer through downloads. These Trojans disguise themselves as useful programs that are regularly downloaded. Examples are the modified versions of respective programs that are malware infected. Such versions are mostly referred to as the cracks for the programs.

Your PC can also be infected through files that may not look like programs at first glance. For instance, you may download a video or songs containing an executable file. Other examples include screen savers, which are equally dangerous as any other program.

Malware may also use security ‘holes' in popular programs or the operating system. The exploits use the ‘holes’ left open unintentionally in the operating system. Users who do not upgrade their software for released security updates are vulnerable to malware penetration.

How the firewall protects your computer
When you want to visit a particular website, it may not be easy to remember their numerical addresses. So, the DNS converts the site name to the IP address of the PC. This is done by sending a DNS request packet to another computer known as the DNS server asking it for the IP address. The server sends a response packet containing the sought information, enabling your computer to send a request package to the particular website which responds by sending the requested web page.

Firewalls work by inspecting both the incoming and outgoing connections. They keep a memory of the programs that initiate each connection, and they use this information to perform stateful inspection. The setback of using advanced firewalls is that they tend to use a lot of network resources as well as CPU, which slows your computer.
A breach of someone's privacy can be adversely intimidating. To prevent this, you should install DNS Firewall on your computer to ensure protection from malware. Enjoy your browsing! The website is a useful resource if you would like to learn more information.