# How to Detect VPN using Swift
VPNs are widely used for privacy, but they can also be exploited to bypass geo-restrictions, manipulate in-app content, or hide fraudulent activity. Detecting VPN usage in your iOS app is challenging, but there are solution which make it practical and reliable.
### What is VPN?
A **VPN (Virtual Private Network)** encrypts traffic and routes it through remote servers. While this protects privacy, it can also help attackers:
* **Bypass geo-restrictions** (e.g., accessing services from unsupported countries)
* **Hide malicious activity** like bot traffic or credential stuffing
* **Exfiltrate sensitive data** undetected
Attackers often use common VPN apps (NordVPN, ExpressVPN, ProtonVPN) or system-level tunnels to disguise their actions. From a security perspective, detecting VPN usage is like knowing if a user is “wearing a mask”.
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Usage of VPN does **not** automatically impose threat.
{% endhint %}
### How to Detect VPN Usage?
Detecting VPNs isn’t trivial—many providers change IPs, use stealth protocols, or blend with normal traffic. DIY solutions (like hardcoding VPN IP ranges) are unreliable and outdated quickly.
Instead, use expert SDKs that:
* Actively monitor for VPN interfaces and tunnels
* Stay updated against new evasion techniques
* Provide callbacks so your app can respond instantly
### Popular Libraries for VPN Detection
#### freeRASP (by Talsec)
The most robust, developer-friendly and free choice for iOS.
* [Actively maintained](https://docs.talsec.app/freerasp/whats-new-and-changelog)
* Comes with [**14 extra detections**](https://docs.talsec.app/freerasp/wiki/threat-detection) like app integrity, runtime manipulation (hooking with Frida), emulators, debugging, screenshots, etc.
* Trusted by [**6000+ apps worldwide**](https://42matters.com/sdk-analysis/top-security-and-privacy-sdks#talsec)
**Integration Example:**
```swift
import TalsecRuntime
let config = TalsecConfig(
appBundleIds: ["YOUR_APP_BUNDLE_ID"],
appTeamId: "YOUR TEAM ID",
watcherMailAddress: "WATCHER EMAIL ADDRESS",
isProd: true
)
extension SecurityThreatCenter: SecurityThreatHandler {
public func threatDetected(_ securityThreat: TalsecRuntime.SecurityThreat) {
print("Found incident: \(securityThreat.rawValue)")
}
}
public enum SecurityThreat: String, Codable, CaseIterable, Equatable {
// ... other cases ...
case systemVPN
// VPN detected
}
```
**Malwarelytics for Apple**
* Aside from VPN detection, it also contains additional security checks
* Enterprise grade of checks
* Might be expensive for small apps
**Integration Example:**
```swift
class RaspDelegate: AppProtectionRaspDelegate {
func vpnChanged(active: Bool) {
// handle VPN detection
}
}
```
### Comparison Table
| Feature | freeRASP | Malwarelytics |
| ------------------------- | -------- | ------------- |
| Works Offline | Yes | Yes |
| Easy Integration | Yes | Yes |
| Broader Security Coverage | Yes | Yes |
| Free | Yes | No |
#### Commercial Alternatives
When evaluating mobile app security and Runtime Application Self-Protection (RASP), developers often compare various Talsec alternatives to find the right fit for their architecture. The "right choice" depends on the specific problem you need to tackle and which vendor offers the best **bang for your buck**.
The market is diverse, offering different philosophical approaches to protection. Talsec prioritizes top-tier root detection and a balanced security SDK portfolio covering the most popular attack vectors. Meanwhile, some vendors specialize primarily in heavy code obfuscation and compiler-based hardening, while others focus on a drag-and-drop (no-code) integration experience for DevOps-oriented teams. There are also solutions dedicated specifically to API security, active cloud hardening, enterprise compliance, or gaming protection. The most prominent providers alongside **Talsec** include **Guardsquare**, **Appdome**, **Promon**, **Build38**, **Approov**, and **AppSealing**.
### Key Takeaway
VPN usage can bypass app restrictions and pose security risks, but **detection doesn’t have to be DIY or error-prone**. Tools like **freeRASP** provide reliable, continuously updated detection, letting you respond proactively to potential threats.
👉 If you want **VPN detection plus root, Frida, emulator, and tampering protection** in one free package, start with [**freeRASP by Talsec**](https://talsec.app/).
{% hint style="success" %}
Handle App Security with a Single Solution! Check Out Talsec's Premium Offer & Plan Comparison!
#### Apps Security Threats Report 2025
#### Plans Comparison
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{% endhint %}
