Security Technology Explained

5 Nifty Ways to Use DNS to Your Advantage

James Frew 27-03-2017

With the internet getting ever faster it can be easy to forget about the structure behind it. Away from the physical infrastructure of cables, telephone lines, and routers, a digital structure exists that directs all your traffic around the web.


One of the most underappreciated parts of that digital infrastructure is the Domain Name System (DNS). DNS is often referred to as the phonebook of the internet, but it is far more than just a lookup service.

What Is DNS?

The DNS’s main function is to turn an easy to remember URL into the IP address for the site. Your default DNS server will usually be the one provided by your internet service provider (ISP).

Type into the address bar of your browser and a request is sent to your DNS server to get the site’s IP address. If your ISP can find the site in its DNS database then it will send the site back to you.

DNS Record

With billions of websites, your ISP won’t maintain a comprehensive list of every DNS record in the world. If the site isn’t listed in your ISP’s database then it will request the record from other servers. The record is stored a cache so that requests to that site are quicker in the future. If after trying a number of DNS servers it can’t find a record for the website, you will be presented with a name_not_resolved error.


DNS Server Error

Most of the time leaving your ISP’s DNS server as your default will do just fine, but there are some surprising benefits to shaking things up and trying out alternative servers.

1. Supercharge Your Browsing

It takes less than a couple of seconds usually for a website to load, which isn’t an unreasonable amount of time. But if you had the option to speed it up for free it would seem like the obvious thing to do. Changing your DNS provider can improve loading times for many different reasons How to Optimize Your DNS for Faster Internet "The Internet is just a series of tubes" as one man so wisely stated. Unfortunately, it’s not as simple as that. There’s a complex architecture that supports the Internet, and data packets need to travel... Read More . There are a lot of variables in the system but the main difference is that a separate DNS server is likely to have more sites cached than your local ISP.

A program like NameBench can compare your DNS lookup performance Find the Fastest DNS to Optimize Your Internet Speed Other DNS servers can be faster than your ISP's DNS servers. Find the best DNS settings for your connection with these tools. Read More to other public DNS options, and recommend which server would speed up your connection the most.


2. Add Network-Wide Parental Controls

OpenDNS is a DNS server owned by networking giant Cisco, and incorporates adult site “blacklists”. When a request is made for a lookup to one of the blacklisted sites then the request is blocked.

OpenDNS Parental Controls

Many home routers will allow you to change the network’s default DNS server, which means you could set up the OpenDNS on your entire home network giving you the ability to blacklist sites to protect your kids while they are online 7 Family Safety Tools To Keep Your Kids Safe Online Like the real world, the internet can sometimes be a scary place for your kids. There are some great apps and tools to keep them safe; here are some we think are the best. Read More . Family Shield is OpenDNS’ free server, but they also offer Home and VIP Home options if you want more customization on the filters.

3. Bypass Geo-Restrictions

There are many reasons that you may legitimately want or need to bypass geo-restrictions to access region-blocked video and music. While you could use a VPN for this, there is another simpler way 2 Effective Ways to Access Region-Blocked Videos Without a VPN Internet users outside of the United States are blocked from accessing the wealth of streaming video and music content available to Americans. Even Americans are deprived of international services like BBC iPlayer. Faced with this,... Read More .


Services like UnoDNS are able to unblock region-restricted content by replacing your IP address with one of theirs during a DNS lookup. This tricks the website into thinking you are in a location where the content isn’t blocked. If you change to UnoDNS on your router then the content is unblocked without you having to do anything.

4. Avoid Censorship

Censorship is used by oppressive governments around the world in order to try and restrict the speech of its citizens. No individual government has the power to “shut down” parts of the internet. What they really do is block the site at the local ISP level. When Twitter was blocked by the Turkish government in 2014, some surprising graffiti started to show up.

The numbers in the graffiti were and — Google’s public DNS servers. By spreading the word through graffiti, Turkish citizens were able to undermine the government’s attempt to block the social network.


5. Increase Security

In recent years we have grown used to hearing about website hacks and data leaks What You Must Learn From the Big Security Events of 2016 There is no denying that 2016 is widely regarded as a "bad year", particularly for data security. But what can we learn from the leaks, breaches, and surveillance increases? Read More . An often overlooked problem is when a DNS server is hacked or goes offline. In October 2016 a large DDoS attack took down Dyn DNS for a number of hours. Some of the largest websites in the world like Twitter, Spotify, Reddit, and others use Dyn as their upstream DNS. The DDoS attack meant that some of the most popular services were inaccessible.

Without changing your server, you would just have to wait until your DNS server comes back online. If the attacker is particularly malicious they may even change DNS records to redirect to phishing or malware-ridden pages. By choosing a DNS server that has a good track record of security How To Change Your DNS Servers & Improve Internet Security Imagine this - you wake up one beautiful morning, pour yourself a cup of coffee, and then sit down at your computer to get started with your work for the day. Before you actually get... Read More — like Google’s Public DNS or OpenDNS — you minimize the chances of being victim to these attacks.

Time to Give DNS a Shot

One of the best parts of the DNS is how straightforward it is to change your DNS server. It means that you can experiment, and maybe even have different DNS servers for different situations. If  you don’t get the result you were looking for, it only takes a few seconds to change it back.

Changing your DNS can make a huge impact on your browsing speed, improving your security, bypassing censorship and geo-restrictions. So before jumping to more complicated solutions, try changing your DNS server as a free and easy way to improve your internet experience.

Have you tried any of these DNS tips? Did they make the improvement you were hoping? Do you think we missed any? Let us know in the comments below!

Image Credit: asharkyu via, Phantom Open Emoji via Wikimedia Commons

Related topics: DNS, Georestriction, Internet Censorship.

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  1. Daredevil
    April 7, 2017 at 2:00 pm

    One of the best useful article I have read.

    • James Frew
      April 7, 2017 at 2:02 pm

      Thanks very much! Let me know if you try any of them out!

  2. RW
    March 28, 2017 at 12:02 pm

    Yes, I can, and have, changed DNS on my desktop. I have even done it on the router I use. But, both still have to go thru the modem to access the internet, meaning I am using the DNS set by the ISP. But now I am adding an extra step to the process, my DNS selection redirected to the ISP selection then redirected back to my selection. Unless my understanding of the process is not correct.

    • James Frew
      March 28, 2017 at 12:43 pm

      DNS settings on individual devices over rule DNS settings on routers or modems.

  3. RW
    March 27, 2017 at 6:08 pm

    That sounds good. But in practice, probably not really beneficial. Most of us do not have a direct connection to the internet. We use a piece of equipment called a modem, that is provided by our ISP. The ISP has already set the DNS in the modem to their own server. Most often, that DNS setting can not be changed by the user, so we are locked in to the server the ISP has selected.

    • James Frew
      March 27, 2017 at 7:06 pm

      You might not be able to change the DNS settings on the modem but that doesn't prevent you from setting it up on each machine/smartphone. OpenDNS has a great how-to on it.

    • J
      March 28, 2017 at 1:10 am

      You might want to take a look at the modem/gateway that the ISP gave you. MANY of them will allow you to go into the settings and change the DNS servers that are used.

      Also a large number of use have this cool thing called a router. This router sits behind the gateway from your ISP and can be told to use the DNS service of your choosing.