WebRTC manages to leak my IP when I use proxy, but when I use VPN it only shows VPN server's IP (both proxy and VPN were system-wide). What's the key difference? Google Chrome was used in both tests (webRTC leak test). https://browserleask.com — site I used to run both tests. It also doesn't matter whether I use local TOR 127.0.0.1:9150 proxy or remote proxy server. Results were the same.