How to check if sites use WebRTC

Discussion in 'Guides' started by RGiskardR, Mar 30, 2018.

  1. RGiskardR

    RGiskardR Malware Tester Silver Member

    WebRTC is one of these new technologies that is on the one hand pretty useful and on the other a privacy nightmare as it can be abused.

    WebRTC, the RTC stands for Real-Time Communications, is a set of APIs that all major web browsers support. Its primary use is to integrate better communications capabilities in the browser that websites and services may utilize for voice and video chat, and other communication forms.

    WebRTC is enabled by default in Firefox, Chrome and other browsers, and websites and services may use it without user interaction.

    One of the issues with WebRTC from a privacy point of view is that browsers may leak the "real" IP address of the device to websites. Since there are no WebRTC permission prompts, sites may do so without users even knowing about it.

    Users who connect to a VPN, Socks proxy or Tor, may have the IP of their device leaked automatically because of this which is a huge privacy issue that is ignored for the most part by browser makers.

    Only a few browsers include options to block WebRTC IP leaks. Vivaldi has an option under Settings > Privacy to disable the broadcasting of the device's IP address, and Firefox users may disable WebRTC entirely even by setting media.peerconnection.enabled to false on about:config.

    Add-ons like uBlock Origin, WebRTC Leak PRevent for Chrome, or Opera.

    Privacy conscious Internet users know that WebRTC may leak the IP address of the device, but the bulk of users don't.

    Full reading:
    revC0de, Trim and silversurfer like this.
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