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Android app for detecting VPN usage and network tunneling signals.
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README.md

Android VPN Detector

Research tool for analyzing VPN detection mechanisms on Android.

Features

  • Detect VPN via NetworkCapabilities.TRANSPORT_VPN
  • Analyze active vs global VPN state
  • Interface detection (tun0, wg0)
  • Native + Java network enumeration

Purpose

Demonstrates how apps can detect VPN presence even with split tunneling.

Permissions

  • android.permission.ACCESS_NETWORK_STATE — used to access network state via ConnectivityManager
  • android.permission.QUERY_ALL_PACKAGES — used to enumerate installed applications in order to detect known VPN clients

Screenshots

VPN Active (full tunnel)

VPN Split / Bypass (still detectable)

License

MIT