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How WebRTC Can Reveal IP Addresses Behind a VPN or Proxy

How WebRTC Can Reveal IP Addresses Behind a VPN or Proxy VPNs and proxies route many of your internet connections through another network endpoint. But your browser can also use other networking mechanisms. One worth understanding is WebRTC .

  • ICE candidates reveal public IP addresses distinct from VPN/proxy IPs
  • STUN server observes source address during ICE gathering, potentially disclosing public IP
  • Mismatch between public WebRTC address and expected HTTP exit IP indicates potential IP leak

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