TunnelCheck

An Android app that detects active VPN connections and tunneling tools on the device.

Checks VPN Transport Queries ConnectivityManager for all active networks and inspects their capabilities. Reports a detection if any network has TRANSPORT_VPN set.

Tunneling Apps Scans for a list of known VPN and proxy apps by package name using PackageManager. Reports the names of any installed apps.

Work Profile Checks UserManager for the presence of a managed or work profile. Detects both running inside a work profile (isManagedProfile) and a work profile existing alongside the personal profile (userProfiles.size > 1).

Network Interfaces Enumerates all network interfaces via NetworkInterface.getNetworkInterfaces() and matches their names against known VPN prefixes: tun, tap, ppp, wg, utun, ipsec, xfrm, zt, tailscale.

Proxy Ports Attempts a TCP connection to 127.0.0.1 on a set of ports commonly used by local proxies and tunneling tools: 80, 443, 1080, 3127, 3128, 5555, 8000, 8080, 8081, 8888, 9000, 9050, 9051, 9150. Reports any that are occupied.