DNS Filtering at a glance

February 15, 2019


What is DNS


To explain what DNS (Domain Name System) is, let’s resort to a very widely used metaphor – DNS is a phone book for the internet. To access a domain/site, we habitually type in the browser the necessary domain name, like nyt.com. However, to load this site on your web connected device, your internet browser uses this site’s IP (Internet Protocol) address, a numerical combination of digits and dots, like, for The New York Times site. 


The DNS protocol is used to translate a domain name into the numerical combination the internet browsers operate with. For us, humans, it is much easier to memorize the name of a site, like nyt.com, rather than a numerical combination of 8 digits or longer. Imagine how many numerical combinations you should have memorized to reach your favorite domains if there were no DNS! The DNS protocol is at the very heart of the internet as DNS is indispensable for accessing domains.

Why is there a necessity for DNS filtering


Now we’ve found out what DNS is, it is time to better understand what DNS filtering is and what it is needed for. DNS filtering is a technique of blocking access to certain websites or entire groups of websites with the similar content. This is all about user online safety, not about internet censorship. 


Experienced web surfers know, one can find anything on the internet – literally, the content users consider useful, work-related, entertaining, of educational value as well as the most gross, heinous stuff no sane person would ever like to see – like, adult and child sexual abuse, terrorism-related content, etc. 


And the thing is, internet users often stumble upon the unwanted stuff even without actively looking for it. For example, adult and even porn images can appear in online ads, found all over the internet, whether site visitors want to see such ads or not. Just think of harm children can come to when accessing age-inappropriate and dangerous internet resources. 


Young web surfers are easily lured to make in-app and online purchases with their parents’ hard-earned money. Kids have little understanding if they can really afford these purchases (usually, not) and how much such purchases are worth.


You can unintentionally click a phishing link and leave your personal information to phishers who then can use it to harm you in lots of different ways – from publishing this personal info and the most private of your images online to selling your personal info to internet bad actors for their shady purposes to stealing your identity and your

money from a bank account, to name just a few. 


In case internet users reach a malicious resource, they risk infecting their devices with several kinds of malware. It can wreak an irreparable havoc on the operating system of these devices. And they can become a source of malware infection for any network the infected devices connect to. Getting rid of malware often requires expensive expertise and, at times, is just impossible. 


DNS filtering is what SafeDNS provides and what can be of immense help for you to prevent the cyber threats mentioned above! According