WebRTC Leak
A browser feature that can reveal your real IP address even when you're behind a VPN.
WebRTC powers browser-based video calls. To establish peer-to-peer connections it enumerates your local network interfaces, and by default that list — including your real public IP — is available to JavaScript on any page. VPN users can be de-anonymised this way.
Fixes: use a browser that restricts WebRTC by default (Brave, Firefox with privacy.resistFingerprinting), install an extension that disables it, or use a VPN client that blocks the leak system-wide.
Related terms
A service that encrypts your internet traffic and routes it through a server in another location.
Identifying a user by combining many small browser and device attributes into a unique signature.
The ability to control what information about you is collected, shared and inferred online.