How ISPs Bypass Encrypted DNS to Track All Traffic

Do you think your encrypted DNS keeps your browsing private? In this video, I demonstrate why fancy DNS solutions like Cloudflare, Quad9, or Pi-hole won’t stop ISPs from seeing and blocking the websites you visit. Using a Raspberry Pi configured as a man-in-the-middle router and a simple Python script (sniblocker.py), I show you exactly how Server Name Indication (SNI) leaks your destination in clear text, even when using TLS 1.3 or HTTPS. Watch as I actively monitor and censor connections to major news sites on my own network, proving how easily governments or internet service providers can log your traffic. Finally, we discuss why routing all your traffic through a VPN is the only reliable way to completely encrypt your SNI data and protect your privacy in 2026.

// Python script //
SNI Blocker Python Script: https://github.com/davidbombal/sni-dn…

// YouTube video REFERENCE //
Your Fancy DNS Tricks Won’t Save You!: Your Fancy DNS Tricks Won’t Give You Privacy
How your ISP tracks you (even with encrypted DNS): How your ISP tracks you (even with encrypt…

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// MENU //
0:00 – Introduction

01:29 – Use-Cases
02:48 – MITM Monitoring Explanation

03:13 – How to Block Websites
06:19 – More sni_filter.py Examples

07:59 – SNI Monitoring
13:09 – Outro

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Disclaimer: This video is for educational purposes only.
#dns #sni #censorship

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  • David Bombal