How is DoH different from DNS over TLS (DoT)?

Both protocols encrypt DNS traffic, but DoH uses the standard HTTPS infrastructure, making it blend more seamlessly with regular web traffic. DoT requires a separate port, which can make it easier to identify and block.

Does DoH make my internet browsing completely private?

Not entirely. While DoH protects DNS queries, it doesn’t hide your IP address or encrypt other kinds of traffic. To maximize privacy, consider using DoH alongside a VPN.<span class="ql-cursor"></span>

Can organizations block harmful websites if DoH is enabled?

Yes, but enforcing such controls becomes more complex. Organizations may need advanced solutions to analyze HTTPS traffic while respecting user privacy.

Is DoH beneficial for cybersecurity?

Absolutely. DoH counters specific threats like DNS hijacking and spying. However, users and organizations should implement complementary security measures to address broader risks.

What is the DoH Protocol?

DNS over HTTPS (DoH) is a protocol that ensures privacy and security by encrypting your DNS queries. Instead of sending these queries in plain text, DoH hides them within HTTPS traffic to prevent eavesdropping or tampering by malicious actors.

Think of it as putting a private envelope around your internet address requests, keeping them safe from prying eyes.

Understanding the DoH Protocol

The Domain Name System (DNS) works like a phonebook for the internet, helping translate human-friendly web addresses into the numerical IP addresses computers use to communicate. Traditionally, these DNS queries are sent unencrypted, making them visible to anyone monitoring the network.

DoH steps in to solve this vulnerability by encrypting DNS requests and transmitting them through secure HTTPS connections. This prevents internet service providers (ISPs), hackers, or other intermediaries from spying on your online activity or interfering with legitimate connections.

For instance, if you try to visit www.example.com, a typical DNS query might reveal your intended site to third parties. With DoH, that query is encrypted and can’t be easily intercepted or manipulated.

Why Does the DoH Protocol Matter?

DoH plays a vital role in protecting user privacy and improving cybersecurity by:

Blocking Surveillance: Since DNS requests are encrypted, ISPs or attackers can’t easily track what websites you’re visiting.
Preventing Hijacking: Malicious actors can’t manipulate your DNS queries to redirect you to phishing websites or inject malware into your browsing.
Protecting Public Wi-Fi Users: DoH adds a layer of security for individuals using unsecured Wi-Fi networks, reducing the risk of exposure.

However, DoH isn’t without controversy. It can complicate network monitoring for organizations and make it harder to enforce cybersecurity policies. Businesses must balance privacy gains with their ability to detect and mitigate threats effectively.

How to Use DoH

There are several ways to enable DNS over HTTPS on your devices, depending on your browser, operating system, or network:

Browser Settings: Most modern browsers, like Chrome, Firefox, and Edge, have built-in options to enable DoH.
Operating System Features: Platforms like Windows 11 include system-wide settings to activate encrypted DNS queries.
Third-Party Services: Some DNS providers, such as Cloudflare, Google, or CleanBrowsing, offer DoH support for enhanced privacy.