> For the complete documentation index, see [llms.txt](https://docs.talsec.app/freerasp/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.talsec.app/freerasp/freerasp/wiki/threat-detection/system-vpn-detection.md).

# System VPN detection

Detecting a running VPN service on mobile devices is critical for security-sensitive applications, as it can indicate potential privacy and security risks. VPNs can obscure the user’s actual IP address and route data through servers potentially under external control, which might interfere with geographical restrictions and bypass network security settings intended to protect data integrity and confidentiality. Such anonymising features could be exploited to mask illicit activities, evade compliance controls, or access services from unauthorised regions. FreeRASP checks whether the system VPN is enabled.

Below are code snippets demonstrating system VPN detection across various platforms:

```dart
// Android system VPN detection
override fun onSystemVpn() {
    TODO("Not yet implemented")
}

// iOS system VPN detection
case systemVPN

// Flutter system VPN detection
onSystemVPN: () => print("System VPN detected")

// Cordova system VPN detection
systemVPN: () => {
    // Place your reaction here
}

// React Native system VPN detection
systemVPN: () => {
    // Place your reaction here
}

// Capacitor system VPN detection
systemVPN: () => {
    // Place your reaction here
}
```

{% hint style="info" %}
**Recommended action:** Log the event on your BE
{% endhint %}


---

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