DNS Spoofing: What is it and How to Avoid it?


Since you are reading this blog, I assume you already know what DNS is and how does it function? If not, do not worry; let me put this in the simplest form ever. DNS refers to domain name system which associates the domain name of every website to its dedicated and unique IP address. This is done in order to make servers understand what a user is looking for. After all, not everyone knows English right? Or in this case, binary is the language to learn!

Now coming back to the topic,

What is DNS Spoofing?

In order to make you understand this technical attack on DNS, let me tell you some technicalities of DNS. When a user types a website in the browser, the browser sends the request firstly to the local DNS server. This request gets accepted by the local DNS server and the query is matched with the stored IP addresses in the database. When found, the Local DNS immediately sends the perfect response to the user with the required IP address. This is how a website is opened in the browser.

Now imaging a bug in the DNS server which breaks the core functionality of the server and confuses it with bogus IP addresses. The entire system will get hacked and you may lost all your personal belongings and secret data to the bug.

This is not any bug. Hell, this is not a bug at all. It is DNS Spoofing!

In simpler words, DNS spoofing is a type of DNS hacks which feeds the DNS server with malicious information about one or more domain names. This way, the DNS server responds to a query by redirecting the user to a bogus site without any warning or notice.

This, in-turn, results in e-mail hacking, bank account hacking, personal files hacking, system hacking and virus infections.

Scary. Isn’t it?

This brings me to the next topic of this blog:

How to Prevent Yourself from Becoming a Prey to DNS Spoofing?

The way DNS servers work, there is no protocol to automatically locate the malware and eliminate it. However, there is an ultimate way by which this DNS hack can be tackled with:

Install a DNS Firewall:

DNS firewall is designed with pre-loaded set of instructions which prevents this kind of DNS hacks from happening. Since DNS spoofing is one of the most dangerous and widely spread DNS security issues, DNS firewall is the best way to approach it.

By taking the help of a DNS Firewall, you will be secured from the sites which attackers have created especially for spoofing purposes. Any attempt to play with your DNS settings will be restricted by the DNS Firewall and you’ll be notified not to visit that site again.

Not only that, the bogus site will be added to the DNS Firewall’s universal blacklist and hence, every users who have a firewall, will be protected against the blacklisted sites.

I hope I was helpful in this blog post about “What is DNS Spoofing and How can We Avoid it”. Put your questions in the comment section below and I’ll try my best to address them as quickly as possible!

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