Firefox and Chrome have implemented WebRTC that allow requests to STUN servers be made that will return the local and public IP addresses for the user. These request results are available to javascript, so you can now obtain a users local and public IP addresses in javascript.
Test Your Router - RouterSecurity.org There is a WebRTC Leak Test at BrowserLeaks.com. The Mullvad VPN has a tester page to insure that you are connected to their service. It also does a WebRTC test. See https://am.i.mullvad.net. In March 2018, Paolo Stagno created ip.voidsec.com. See his blog about it and the source code. VPN provider OVPN offers a WebRTC leak test. Mullvad VPN Review (2020): Is It Truly Anonymous? | BlinkList Aug 24, 2019 How to fix WebRTC leaks - VPN Reviewer Sep 08, 2016
Mullvad VPN review | TechRadar
Test Your Router - RouterSecurity.org There is a WebRTC Leak Test at BrowserLeaks.com. The Mullvad VPN has a tester page to insure that you are connected to their service. It also does a WebRTC test. See https://am.i.mullvad.net. In March 2018, Paolo Stagno created ip.voidsec.com. See his blog about it and the source code. VPN provider OVPN offers a WebRTC leak test. Mullvad VPN Review (2020): Is It Truly Anonymous? | BlinkList
Jun 14, 2020
WebRTC is a technology that allows users to communicate with video and audio directly in the browser without any plugins installed. An unfortunate side effect is that your real IP is at risk for being exposed, stripping you of your anonymity. Why would a Mullvad server be blacklisted? Most likely because someone, while connected to our GitHub - mullvad/webrtc-ips: Demo: https://mullvad.github Firefox and Chrome have implemented WebRTC that allow requests to STUN servers be made that will return the local and public IP addresses for the user. These request results are available to javascript, so you can now obtain a users local and public IP addresses in javascript. Mullvad VPN review | TechRadar Apr 28, 2020 Which VPNs Leak? IP, DNS & WebRTC VPN Leak Tests Jun 24, 2020