WebRTC implement STUN (Session Traversal Utilities for Nat), a protocol that allows to discover the public IP address. To disable it: Mozilla Firefox: Type "about:config” in the address bar. Scroll down to “media.peerconnection.enabled”, double click to set it to false. Google Chrome: Install Google official extension WebRTC Network Limiter . Opera: Type "about:config" in the address bar or go to "Settings". Select "Show advanced settings" and click on "Privacy & security". At "WebRTC" mark select "Disable
In this context, with "DNS leak" we mean an unencrypted DNS query sent by your system OUTSIDE the established VPN tunnel.
In brief: Windows lacks the concept of global DNS. Each network interface can have its own DNS. Under various circumstances, the system process svchost.exe will send out DNS queries without respecting the routing table and the default gateway of the VPN tunnel, causing the leak.
Links to ipleak.net (49)
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