- Private DNS only encrypts domain translation requests, while VPN protects all internet traffic.
- VPNs allow you to hide your real IP address and change your geographical location, something a DNS server alone cannot do.
- Using a VPN usually makes private DNS redundant, since VPNs typically integrate their own encrypted DNS servers.
You've probably come across the terms VPN and private DNS while looking for ways to make your browsing a bit more secure. At first glance, they might seem to do the same thing because they both promise more privacy, but the reality is that they're completely different. While one ensures that no one knows which "door" you're knocking on, the other builds a secure tunnel so no one can see what's inside your bag.
Browsing the internet today without considering security is, frankly, playing with fire. Between internet providers snooping on everything and governments erecting barriers wherever they please, understanding these tools is crucial for eliminating your online footprint and protecting yourself. In this article, we'll break down how they work , their similarities, and, above all, when it's best to use one or the other so you don't get ripped off.
What on earth is DNS and why does it matter?
To understand private DNS, you first need to know what conventional DNS is. Imagine it's the internet's contact list . Computers don't understand names like "google.com"; instead, they communicate using numbers called IP addresses. DNS is responsible for translating that user-friendly name into an IP address that the machine can understand.
Here's the problem: by default, your internet service provider (ISP) handles this translation. This means your provider knows exactly which pages you visit, even if they can't see the exact content of what you're doing on them if the website uses HTTPS. Furthermore, many ISPs use DNS to censor or block websites, simply by having the "translator" report that the page doesn't exist.
The leap to Private DNS: Lock down your queries
A private DNS doesn't change the basic translation function, but it adds a layer of modern encryption . Instead of sending the query in plain text (which anyone can read along the way), it uses protocols like DoH (DNS-over-HTTPS) or DoT (DNS-over-TLS) so that the request travels encrypted.
There are several ways to achieve this. DoH mixes DNS traffic with normal web traffic (port 443), making it nearly impossible for network monitors to detect. DoT, on the other hand, uses port 853 , which is more direct but easier for network administrators to block. There's also DNSCrypt, the veteran of the group and very powerful, although it's not as compatible with all devices.
The power of VPNs: Total protection
A VPN, or Virtual Private Network, goes much further. It doesn't just translate names; it creates an encrypted, end-to-end tunnel between your device and a remote server. When you connect, all your internet traffic, without exception, travels through this tunnel. This means your real IP address is hidden and replaced by the VPN server's IP address.
Thanks to this, you can do things a DNS server doesn't allow, such as bypassing geographical restrictions . If you want to access Netflix's Japanese catalog, you simply connect to a server there, and the website will think you're physically located in Japan. Furthermore, a VPN protects your data on public Wi-Fi networks, preventing any hacker from intercepting your information.
Direct comparison: What are the real differences?
To avoid confusion, let's analyze the points where these two technologies clash. In terms of security and privacy , VPNs win hands down because they encrypt the entire data flow, while private DNS only encrypts the query about the website's location.
- Speed: Here, private DNS has the advantage. Since it doesn't have to encrypt all traffic or pass through a distant intermediary server, the impact on speed is zeroA VPN, depending on its quality, can slightly slow down the connection.
- Compatibility: Setting up a DNS is incredibly easy and compatible with almost anything, from a mobile phone to a game console. A VPN usually requires a native app or more complex router configurations.
- Cost: Many private DNS services are free or very cheap. Quality VPNs that truly respect privacy usually require a monthly subscription.
SmartDNS: An intermediate point
There's also SmartDNS, which is basically a souped-up DNS with a proxy server. Its purpose isn't privacy, but rather to trick streaming services into granting access to content from other countries without sacrificing speed. The downside is that it doesn't offer encryption or hide your real IP address, making it a convenience tool, not a security solution.
Can they be used together or is it a waste of money?
Here's an important distinction. Almost all premium VPNs already include their own private DNS servers . When you activate the VPN, your DNS queries already travel through the encrypted tunnel. Attempting to set up an external private DNS while using a VPN can be counterproductive, as it could lead to DNS leaks , causing some requests to escape the tunnel and reveal your activity.
If you don't use a VPN, setting up a private DNS (like those from Cloudflare or Quad9) is a brilliant idea to prevent your internet provider from keeping such a detailed record of your activity. But if you already have a good VPN active, there's no need to complicate things by configuring additional DNS servers.
Quick setup on your devices
If you've decided on a private DNS, setting it up is a piece of cake. On Android , simply go to Network & Internet and look for the "Private DNS" option to enter the hostname. On Windows or Mac , you do it from the network properties, changing the DNS IP addresses to something like 1.1.1.1 or 8.8.8.8.
For the VPN, the easiest way is to download the provider's official app, choose your country, and click the connect button. If you're an advanced user, you can install the VPN on your router so that all your home devices, including your Smart TV or game console, are automatically protected.
Technical evolution: From IPv4 to IPv6 and TLS encryption
All of this is happening in a constantly changing environment. We've gone from IPv4 (with its limited 32-bit addresses) to IPv6 , which offers an astronomical number of addresses so that no device is left without a connection. This has brought new types of DNS records, such as the AAAA record , necessary to handle these longer addresses.
At the same time, security has evolved. The old SSL has given way to TLS (Transport Layer Security) , which is the protocol that now supports most encryption on the web and is the basis on which modern private DNS systems operate to ensure that information is not altered.
