A VPN tunnel is the encrypted connection your device builds with a VPN server the moment you connect. Every request you send after that (a page load, an app sync, a video stream) travels through it before reaching the open internet. The rest of this article covers what's actually happening inside that tunnel, which protocols build it, and how VPN Super handles the details so you don't have to.

A VPN tunnel isn't a physical thing. There's no separate lane carved into the internet. It's a name for what happens when your device and a server agree on an encryption method, then wrap every packet you send in that encryption before it leaves your device. Anyone watching the connection from outside, whether that's your ISP, the Wi-Fi network at a coffee shop, or someone on the same router, sees scrambled data going to one IP address. They can't read what's inside it.

How does a VPN tunnel work, step by step?

Here's what happens, in order, when you tap Connect:

1. Your device and the VPN server agree on an encryption method (the protocol, more on that below) and exchange keys used to encrypt and decrypt traffic.
2. Your device wraps each outgoing packet in that encryption. This step is called encapsulation: the original packet becomes the encrypted payload of a new one.
3. The encrypted packet travels across the regular internet to the VPN server. To anyone intercepting it along the way, it just looks like noise addressed to the server's IP.
4. The VPN server decrypts the packet, unwraps it, and sends the original request out to its destination (a website, an app's servers, a streaming service) using its own IP address instead of yours.
5. The response comes back to the VPN server, gets encrypted again, and travels back through the tunnel to your device, which decrypts it and hands it to whatever app asked for it.

This repeats for every packet, for as long as you're connected. A useful way to picture it: it's less like a fixed pipe running underground and more like an armored car that gets a brand-new, sealed route assigned every time it makes a trip. The route isn't reused, and nobody outside the car can see what's inside it.

Here's what that protects. On hotel or airport Wi-Fi, anyone else on the network with the right tools can potentially watch unencrypted traffic, a technique called packet sniffing. Log into your email or bank on that network without a VPN, and someone nearby could capture your login details. With the tunnel active, they see encrypted noise instead. The same mechanism protects you whether you're checking email at a gate or settling in with VPN Super's streaming VPN in a hotel room. The tunnel is what's doing the protecting, wherever you're connecting from.

Which protocols build the tunnel, and does VPN Super use WireGuard?

The "protocol" is the specific method your device and the server use to encrypt and manage the tunnel. Different protocols trade off speed, battery use, and how well they hold up on restrictive networks. This is also the part where a lot of VPN explainers get vague, or worse, imply their app uses one universal protocol everywhere. VPN Super doesn't work that way. The protocol available to you depends on which device you're using.

A quick read on each protocol:

• Auto: not a protocol itself. It's VPN Super picking the best available protocol for your network and device. Available on iOS, Android, and Windows.
• Super: VPN Super's own protocol, built to stay reliable on networks that actively try to block or throttle VPN traffic. iOS and Android only.
• OpenVPN: a widely used, well-tested protocol. Slower to reconnect after a drop than newer alternatives, but broadly compatible.
• WireGuard: a newer, lighter protocol that reconnects fast and generally performs better on unstable connections. On VPN Super, that's Windows and Mac.
• IKEv2: handles network switches well, for instance when your phone hands off from Wi-Fi to mobile data mid-connection.
• V2Ray: designed to disguise VPN traffic as regular web traffic, which makes it useful on networks that specifically try to detect and block VPN connections. Live in Iran, Russia, Oman, and Togo. Read more about V2Ray.

So does VPN Super use WireGuard? On Windows and Mac, yes. On iOS and Android, no: those two run on Auto, Super, IKEv2, OpenVPN, or V2Ray instead. Neither answer is more correct than the other. The right protocol depends on what you're running the app on, and VPN Super's Auto mode, where it's available, handles that decision for you.

Is a VPN tunnel the same thing as split tunneling?

No, and the names cause confusion. A VPN tunnel is the encrypted connection itself. Split tunneling is a setting that decides which apps use that tunnel and which don't. For example, routing your browser through the VPN while your local printer app talks directly to your home network.

On VPN Super, Split Tunneling is available on Android and Android TV, where you can choose which apps go through the tunnel and which bypass it. iOS and Apple TV only support DNS-based split tunneling, a narrower version limited by how Apple lets VPN apps work on those platforms. That's not the full app-by-app control the Android side has. Windows and Mac don't offer split tunneling right now.

What happens if my VPN tunnel drops?

If your connection drops mid-session, whether the Wi-Fi cuts out, you walk out of range, or the network changes, the tunnel closes. For a moment, your device may fall back to sending traffic outside the tunnel, unencrypted, before it reconnects. That's the exact gap a Kill Switch closes: it blocks all internet traffic the instant the tunnel drops, until the VPN reconnects, so nothing leaks out in between.

On VPN Super, Kill Switch is available on iOS and Android, off by default. You turn it on in settings if you want that extra layer. It's not yet available on Windows, Mac, Apple TV, or Android TV. What is a VPN kill switch covers exactly how it behaves on each platform and how to turn it on.

Can a VPN tunnel be hacked or leak my data?

The tunnel itself, the encryption between your device and the server, is not something an attacker on your network can just read. What actually causes leaks in practice is usually one of two things: the tunnel drops and traffic briefly goes around it (which a Kill Switch prevents), or a DNS request slips outside the tunnel and reveals which sites you're visiting even though your traffic itself stayed encrypted.

DNS and IPv6 leak protection close that second gap. On VPN Super, that's confirmed live on Windows and Mac. VPN Super hasn't confirmed DNS and IPv6 leak protection status on iOS and Android yet, so this article isn't claiming it there. Check the app's current feature list on your device if that matters for your use case. And to be clear about the third kind of leak: WebRTC leak protection isn't available on any VPN Super platform today.

How do I set up a VPN tunnel?

You don't build one by hand. If you've seen instructions for setting up a VPN manually, entering a server address and protocol into your phone or computer's built-in VPN settings, that's not how VPN Super works on any platform. Open the app, tap Connect, and the app builds the tunnel and picks the protocol for you (or lets you choose one, where that's available). That's the whole setup.

Is a VPN tunnel different from a proxy?

This also clears up a common mix-up. "VPN tunnel" describes what any VPN does, not a specific app. If you're looking for a particular tool with "tunnel" in the name, that's a different product entirely, so double-check you're looking at the right thing before you compare features.

What can't a VPN tunnel do?

How do I check that my VPN tunnel is actually working?

Once you're connected, confirm the tunnel is doing its job rather than assuming it. Search "what is my IP" before and after connecting; the address should change. A dedicated DNS leak test site will show whether your DNS requests are routed through the tunnel or leaking to your ISP's servers. If every server listed traces back to your VPN provider rather than your ISP, the tunnel is handling DNS correctly. If you ever see your real IP or your ISP's DNS servers listed while connected, reconnect. If it keeps happening, switch protocols. Some networks interfere more with one protocol than another.