DNS Leak Prevention & DoH Secure Resolution Masterclass

Preventing ISP DNS hijacking and WebRTC public IP exposure with encrypted DoH resolvers and strict routing policies.

Reading time: 1 min
By:
Proton Security Team
Security
DNS LeakWebRTCDoHSecurityPrivacy

Understanding DNS Leaks

Even with active proxies, unencrypted UDP port 53 DNS queries routed to local ISP servers can completely expose your browsing destination and location.

Core Defense Mechanisms

  1. Deploying DNS over HTTPS (DoH): Encrypt DNS queries inside standard TLS packets (https://1.1.1.1/dns-query or https://8.8.8.8/dns-query).
  2. Mitigating WebRTC IP Leaks: Disabling browser STUN leaks that bypass virtual network interfaces.
Last modified: