Detection of VPN

A VPN (virtual private network) can be used to tunnel all traffic from the device through a remote server. Although VPNs are primarily used to add a level of security, they can also pose a danger when the device connects to a dubious network. For example, some free VPN services might use invasive advertising or sell browsing data to third parties. Last but not least usage of a VPN might be restricted or illegal in some countries.

Configuration

This feature can be configured during the Malwarelytics initialization phase:

val raspConfig = RaspConfig.Builder()
    .vpn(DetectionConfig)
    // configuration of other RASP features
    .build()

Available values of DetectionConfig:

Value Description
NoAction indicates that the VPN will not be automatically detected. A manual check is still possible.
Notify indicates that the VPN will be automatically detected and observers will be notified.
Exit(
exitUrl:String?)
indicates that the VPN will be automatically detected and the app will be terminated when a VPN is automatically detected.

VPN detection defaults to DetectionConfig.Notify.

List of available parameters for some config values:

Parameter Description
exitUrl:String? defines the URL to be opened when the app is terminated because of the automatic detection. Defaults to null.

Usage

After initialization, the VPN detection feature can be accessed via RaspManager. This can be used to register an observer or to trigger a manual VPN detection check.

Registering an Observer

VPN detection can trigger a certain action. To achieve that, an observer needs to be configured and registered.

Observer configuration:

val raspObserver = object : RaspObserver {
    override fun onVpnDetected(vpnEnabled: Boolean) {
        // handle VPN detection
    }
    // handle detection of other RASP features
}

The observer can be registered in RaspManager. When it is no longer needed, it can be unregistered again.

raspManager.registerRaspObserver(raspObserver)
raspManager.unregisterRaspObserver(raspObserver)

Triggering a Manual Check

VPN detection check can be triggered manually in RaspManager by calling the isVpnEnabled() method. A simple boolean answer is given.

val isVpnEnabled = raspManager.isVpnEnabled()

More information on general RASP feature configuration and usage can be found in this overview.

Last updated on Nov 21, 2023 (13:06) View product
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