What Is a VPN Tunnel?
a VPN Tunnel — an encrypted virtual path across an untrusted network that makes two endpoints behave as if directly and privately connected — the core mechanism of every VPN.
How it works
A VPN tunnel wraps (encapsulates) your original traffic inside encrypted packets addressed between the two tunnel endpoints. Anyone intercepting sees only encrypted data between those endpoints — not the real source, destination or content inside. The receiving end decrypts and forwards the original traffic onward.
Why it matters
Tunnels are how site-to-site and remote-access VPNs actually work — IPsec tunnels between offices, SSL/TLS tunnels for remote workers. Understanding encapsulation (a packet inside a packet) is key to grasping VPNs, GRE and overlay networks. See what a VPN is.
Frequently asked questions
What is a VPN tunnel?
An encrypted virtual path across an untrusted network — it encapsulates your traffic inside encrypted packets between two endpoints, keeping the real content private.
How does a VPN tunnel work?
It wraps original packets inside encrypted ones addressed between the tunnel endpoints; the far end decrypts and forwards the original traffic, so interceptors see only encryption.
What is the difference between a VPN and a VPN tunnel?
The tunnel is the specific encrypted path/mechanism; the VPN is the overall private network service built using one or more tunnels.
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