WebRTC leak test

What is a WebRTC leak?

WebRTC is an API with the purpose of enabling a direct link between web browsers when using services like VoIP and file sharing peer-to-peer. WebRTC is included in the majority of web browsers.

It can however also leak your private IP addresses even though you're connnected to a VPN service.

How are IP addresses leaked through WebRTC?

WebRTC sends so-called STUN requests, returning your network adaptor’s internal and external IP addresses. Since these STUN requests are made through UDP, they are not transported over HTTP or SOCKS, which both are based on the networking protocol TCP. This is what a request looks like: