VPN · 6 min read · May 30, 2026

What is a VPN and How Does It Work?

A VPN encrypts your internet traffic and hides your IP address. Here's exactly how it works, what it protects you from, and what it doesn't.

VPN is one of the most talked-about privacy tools on the internet — and also one of the most misunderstood. Some people think it makes them completely anonymous. Others think it's only for bypassing Netflix geo-blocks. The truth is somewhere in between.

What is a VPN?

A VPN (Virtual Private Network) is a service that creates an encrypted tunnel between your device and a server operated by the VPN provider. All your internet traffic passes through that tunnel before reaching the public internet.

The result: websites see the VPN server's IP address instead of yours, and your ISP sees encrypted traffic instead of your browsing activity. For context on why this matters, see what your IP address reveals about you →

How a VPN Works — Step by Step

Without a VPN, the path of your internet request looks like this:

Your device → Your ISP → Website

Your ISP can see every site you visit. The website sees your real IP address and location.

With a VPN connected:

Your device → Encrypted tunnel → VPN server → Website

1. Your device encrypts all outgoing data using the VPN protocol
2. The encrypted data travels to the VPN server (your ISP sees only encrypted traffic, not what you're doing)
3. The VPN server decrypts the data and forwards your request to the website
4. The website sees the VPN server's IP, not yours
5. The response comes back through the same encrypted tunnel

What a VPN Protects You From

Your ISP Seeing Your Browsing

Without a VPN, your ISP logs every website you visit. A VPN encrypts your traffic so your ISP only sees that you're connected to a VPN server — nothing more. Note that your ISP still sees DNS queries unless you also use encrypted DNS (DoH/DoT).

IP-Based Tracking

Websites, ad networks, and analytics tools use your IP address to identify and track you across sessions. A VPN replaces your real IP, breaking that tracking chain.

Public Wi-Fi Snooping

On public Wi-Fi (coffee shops, airports, hotels), anyone on the same network can potentially intercept unencrypted traffic. A VPN encrypts everything, making interception useless.

Geo-Restrictions

Content that's blocked in your country (streaming libraries, websites, services) can often be accessed by connecting to a VPN server in a country where it's available.

What a VPN Does NOT Protect You From

This is the part most VPN ads skip:

• Website tracking via cookies — if you're logged into Google or Facebook, they know who you are regardless of your IP
• Browser fingerprinting — your browser leaks a unique combination of settings that can identify you even without an IP
• Malware — a VPN doesn't scan or block malicious files
• Your VPN provider — you're shifting trust from your ISP to the VPN company. If they log data and are compelled to share it, you're exposed. Choose a provider with a verified no-logs policy.
• Account-based tracking — if you're logged in, the site knows it's you

VPN Protocols Explained

The protocol determines how the VPN tunnel is built. The main ones:

| Protocol | Speed | Security | Best for | |----------|-------|----------|----------| | WireGuard | Very fast | Excellent | Default choice in 2026 | | OpenVPN | Moderate | Excellent | Legacy, very trusted | | IKEv2 | Fast | Good | Mobile (reconnects well) | | L2TP/IPSec | Slow | Moderate | Avoid if possible |

Most modern VPN apps handle protocol selection automatically. WireGuard is the recommended default.

VPN vs Proxy — What's the Difference?

A VPN is often compared to a proxy server — both hide your IP, but they work very differently. A proxy only covers one app and has no encryption. A VPN covers your entire device with full encryption. Read the full VPN vs Proxy comparison →

Choosing a VPN

Key things to look for:

• No-logs policy — independently audited, not just claimed
• WireGuard support — for fast, modern connections
• Kill switch — cuts internet if the VPN drops, preventing IP leaks
• DNS leak protection — ensures DNS queries go through the VPN
• Jurisdiction — avoid VPNs based in countries with mandatory data retention laws

Providers worth considering: Mullvad (most private), ProtonVPN (open source, Swiss jurisdiction), NordVPN (most popular, audited no-logs).

Free VPNs — Are They Safe?

Generally, no. Running VPN infrastructure costs money. If the service is free, the business model is usually selling your data — the exact opposite of what you want from a privacy tool.

There are exceptions: ProtonVPN's free tier is genuinely no-logs and funded by paid subscribers. Avoid anything that shows ads or has unclear ownership.

How to Verify Your VPN is Working

After connecting to a VPN, visit IPLocator and check:

1. Your IP address should match the VPN server's IP, not your real one
2. Your location should show the VPN server's city
3. Your ISP should show the VPN provider's name

If any of these still show your real details, you may have a DNS or WebRTC leak — check your VPN app's leak protection settings.

Ready to use one? See how to hide your IP address →