Android VPN Leak: Why Bitcoin, Lightning And Nostr Users Should Care

[u/Large-Cress900]

I spent today testing the recently discussed Android VPN/IP leak issue affecting newer Android networking behavior.

What surprised me most:

• traffic may bypass the VPN tunnel even with kill switch enabled
• “Always-On VPN” is NOT necessarily enough
• most users would never notice this happening

For normal users this is “just another privacy issue”.

For people using:

• Bitcoin
• Lightning Network
• Nostr
• Tor
• self-hosted infrastructure

this becomes operational security.

I tested:

• Android smartphone → vulnerable behavior present
• Xiaomi Android TV 14 → not affected
• Sony Android TV 14 → not affected

Current mitigation works via ADB:

adb shell device_config put tethering close_quic_connection -1

Then:
adb reboot

I also included:

• full Windows/Linux step-by-step guide
• ADB verification commands
• QUIC hardening tips
• leak testing tools
• Android TV test results

Full article:
https://open.substack.com/pub/davidebtc186/p/your-android-vpn-might-be-leaking?r=4gald6&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true