What Is DNS and Why You Should Care
Domain Name Servers sounds like a big scary techy word. However, the concept is relatively simple and adjusting your DNS is an essential step in your cybersecurity. Best of all it’s free, and it can speed up your internet.
Domain Name Servers are large databases that track and store what IP belongs to each domain When you type a web address “www.imfeelingfabulous.com “ into a browser. Your computer sends those instructions to your router, and your router passes the message to your internet provider to go find “www.imfeelingfabulous.com”. The message sent to your provider ‘s DNS cache which then looks up the IP address connected to that domain and directs you there to get the recent updates.
Ok so that’s great but really why should I care, you ask. The reason is not all DNS servers are the same, and typically the default DNS provided by your ISP is lacking in speed and features.
The two most popular DNS that people use are Google and OpenDNS. Google is great for speed and reliability. OpenDNS has excellent rates and also has prebuilt filters that filter out malicious sites. What that means is if you accidentally click on an email linked to a known phishing site OpenDNS will block that site keeping you a whole lot safer. OpenDNS also comes with family filters which work great for preventing kids from accessing inappropriate content.
More recently there is a new DNS provided by IBM, Packet Clearing House and Global Cyber Alliance called Quad9. It combines information collected from over 18 Threat Intelligence Providers. Here is a quote from there website explaining how it works.
Quad9 routes your DNS queries through a secure network of servers around the globe. The system uses threat intelligence from more than a dozen of the industry’s leading cyber security companies to give a real-time perspective on what websites are safe and what sites are known to include malware or other threats. If the system detects that the location you want to reach is known to be malicious, you’ll automatically be blocked from entry – keeping your data and computer safe.