How a VPN Works
Visual Explainer & Interactive Tutorial
Curious about what your internet service provider (ISP) can see? Our interactive VPN packet tracer demonstrates exactly how a Virtual Private Network builds a secure, encrypted tunnel to mask your IP address and protect your browsing data.
Packet Tracer V1.0
Simple Explanation
This simulation shows the massive difference in what your Internet Service Provider and websites can see when data travels across the web.
Without a VPN: Look at the "ISP Surveillance" bar. It showed your simulated IP address (24.55.10.1) and exactly what website domain you were visiting. Even if the content is HTTPS encrypted, the metadata—meaning where you are going—is visible, allowing them to build a browsing profile.
With a VPN: The ISP bar only showed that you were talking to a "VPN Server" and the destination was masked through tunnelling. They know you are online, but they do not know where you are going. The website saw the VPN's IP address (45.33.22.11) instead of yours, protecting your location.
Tech Glossary
- ISP Surveillance
- Your Internet Service Provider can legally monitor and log the domains, meaning websites, you visit for their own analytics or to comply with laws. A VPN hides the final destination from them.
- Encryption
- The process of scrambling your data into unreadable code. In our simulation, the red packet represents visible metadata, while the green packet represents a secure tunnel.
- IP Address
- Your digital fingerprint. It tells websites where you are located physically. A VPN replaces your personal IP with an anonymous one from the VPN server.
Frequently Asked Questions
What exactly does a VPN hide from my ISP?
A Virtual Private Network (VPN) encrypts your internet traffic, preventing your Internet Service Provider (ISP) from seeing the specific websites you visit, the files you download, or the data you send. They will only see that you are connected to a VPN server, but not the contents of that connection.
What is a VPN tunnel?
A VPN tunnel is a secure, encrypted connection established between your device and the VPN server. It acts like a protective shield around your data, ensuring that even if someone intercepts your network packets, they cannot read the information inside.
Does a VPN change my IP address?
Yes. When you connect to a VPN, your real IP address is masked and replaced with the IP address of the VPN server you connected to. This helps protect your physical location and identity from the websites and services you access.