WebRTC leak test and permission check
WebRTC, the browser's built-in real-time communication stack, discovers network addresses via STUN. Even behind a proxy or VPN it can reveal your real public or LAN IP — a WebRTC leak. This page runs the check locally and compares the addresses WebRTC exposes with your current egress IP.
If a public IP different from your proxy exit shows up, restrict WebRTC (e.g. the WebRTC Network Limiter extension in Chrome, or media.peerconnection.enabled=false in Firefox). Camera, microphone, location and notification permission states are listed too.
Related tools
More networking guides on the blog: 小磊哥の博客