Category

DNS Filtering

Category

Domain Name System (DNS) is an addressing system used by the internet through which domain names are located and translated into internet protocol (IP) addresses. When a user attempts to access a website through an internet browser, a DNS query is performed. The DNS server matches the request to the respective IP address of the domain and responds to the query by loading the requested web page on the user’s browser.

So what is DNS Filtering? It is a technique by which access to specific websites, web pages, or IP addresses, can be blocked or permitted. If a DNS filter is in place, the IP address being returned from the DNS server will be checked before it is permitted to load on the user’s browser. Therefore, DNS filtering ensures that the user is protected from online threats like viruses, malware, ransomware, and so on. DNS web filtering can also be used to block inappropriate websites and web pages that the user may be searching for, especially at the workplace.

The internet represents a revolutionary step forward in the way data is stored and accessed, and in the way business is done. Most enterprises make use of user-friendly websites or web applications which allow their users to interact and transact.

But allowing users to seamlessly interact with your server and database presents some problems too. Primary among them is that it is difficult to differentiate between genuine users and hackers.

Company X is a leading insurance company which provides laptops to all employees for their work, regardless of their grade in the organization’s hierarchy.

The company has deployed a gateway firewall, incorporated with a DNS filter to blacklist or whitelist access to certain websites. In this manner, users are denied access to malicious websites, and threats due to unauthorized website use is prevented while users are within the office network.