How to bind your VPN to your torrent client on Windows and Mac

Using a VPN for torrenting is essential. Without one, every other person downloading or seeding the same torrent can see your real IP address. Plus, your ISP will be able to see exactly what you’re torrenting. The best VPNs keep your torrenting private by creating an encrypted tunnel which routes your internet traffic to a VPN server before sending it onwards.

However, if your VPN drops out – or you forget to connect in the first place – it’s possible for your unencrypted traffic to leak through the network, which exposes your home IP to any prying eyes. That’s where VPN binding comes into play.

In short, VPN binding is a setting within your torrent client that only allows it to download or seed a torrent if your VPN is active. If your VPN is switched off, your torrent client physically cannot connect. It’s a belt-and-braces approach, and vital if you want to be as safe as possible while torrenting.

NB: We do not condone downloading copyrighted or illicit material. Privacy is a fundamental right, but we don’t advocate using it to break the law.

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What is "VPN binding"?

VPN binding is a feature on some torrent clients that allows you to pick your VPN network interface (akin to your ethernet or Wi-FI interface) and route all of your traffic through that connection only. Technically, “network interface binding” covers more than just VPN clients, but the terms are basically interchangeable for our purposes. If you see that a torrent client supports network interface binding, it supports VPN binding.

The reason you’d want to do VPN binding is that it’s another layer of failsafe for your VPN client. Most VPN clients come with a “kill switch,” which disconnects you from the internet when you lose connection to the VPN server you’re using. This keeps you from accidentally sending sensitive information or exposing your IP over an unencrypted connection.

VPN binding works in much the same way. If you can’t send traffic through the VPN connection, the torrent client won’t send any traffic at all. That stops you from downloading over an unencrypted line if you accidentally turn your kill switch off, or if you forget to connect to your VPN in the first place.

Notably, VPN binding works with any VPN. The steps below are the same no matter which VPN you use. However, be aware that you may have to repeat these steps each time you restart your computer, due to the VPN using a different interface.

Which torrenting clients support VPN binding?

Not every torrent client supports VPN binding, as it’s a fairly advanced option. qBittorrent allows you to do it fairly easily, as well as Vuze, so we’re outlining those two below. We’ve also seen that it’s potentially possible to bind through a VPN on Deluge, but it’s significantly more difficult. You can check out the forum notes here.

However, if you’re using Transmission, Bittorrent, or uTorrent, you’ll need to rely on a VPN kill switch or stick to IP binding, which isn’t quite as fool-proof.

How to set up VPN binding on Windows

Setting up VPN binding on Windows is fairly simple, but it requires a little preparation.

First of all, you’ll need to find the network interface that your VPN client has set up inside Windows so that you can direct all of your torrent traffic through it. Each VPN will have a slightly different adapter name, but the steps will stay the same:

• Connect to your VPN
• Open the Start menu and go to Network Connections
• Look for a network adapter that matches the name of your VPN provider (It may also have a generic name referencing “OpenVPN” or “WireGuard”)
• Note down what the adapter is called, as well as the system name for it (something like “tun0”)

You now know which network connection you’ll need to load into your torrent client in the next step.

If you use qBittorrent:

• Open your VPN and connect to a server
• Open qBittorrent and go to Tools > Options > Advanced
• Find the “Network interface” dropdown and select your VPN adapter
• Click OK and restart qBittorrent

If you use Vuze:

• Open your VPN and connect to a server
• Open Vuze and go to Tools > Options
• Click “Mode” from the sidebar and change the configuration mode to “Advanced”
• From the sidebar, click “Connection” and then “Advanced Network Settings”
• In the “Bind to local IP or interface” entry field, input the name of the interface you found earlier
• Make sure that you also click the “Enforce IP bindings even when interfaces are not available” checkbox
• Click Save and restart Vuze

How to set up VPN binding on Mac

It’s as easy to set up VPN binding on Mac as on Windows, but the process is slightly different.

First, you’ll need to pick the network interface that the VPN client creates and load that into your torrent client. However, instead of going through a menu, you can easily grab the info you need from the terminal:

• Open your VPN and connect to a server
• Open Terminal (CMD + Space and then type “Terminal”, or by Applications > Utilities)
• Copy the following command, paste it into Terminal, and hit return: route get default | grep interface
• Terminal will respond with the interface your device is currently using. For example: "interface: utun4"
• utun[x] – "x" being a number – is the network interface that is currently active. Because you connected to the VPN beforehand, this is the interface that your VPN is using, and the one to use when setting up VPN binding.

You now know which network connection you’ll need to load into your torrent client in the next step.

If you use qBittorrent:

• Open your VPN and connect to a server
• Open qBittorrent and go to Tools > Options > Advanced
• Find the “Network interface” dropdown and select the utun you found earlier
• Click OK and restart qBittorrent

If you use Vuze:

• Open your VPN and connect to a server
• Open Vuze and go to Tools > Options
• Click “Mode” from the sidebar and change the configuration mode to “Advanced”
• From the sidebar, click “Connection” and then “Advanced Network Settings”
• In the “Bind to local IP or interface” entry field, put in the name of the interface you found earlier
• Make sure that you also click the “Enforce IP bindings even when interfaces are not available” checkbox
• Click Save and restart Vuze

How does VPN binding work?

When you connect to the internet, your operating system creates a “network interface” that represents the physical channel you’re sending your traffic through. If you’re connected through both Ethernet and Wi-Fi, you’d have two separate network interfaces on your OS that handle each physical connection separately.

Connecting through a VPN creates a “virtual” network interface with an encrypted tunnel attached to it. To the OS, it’s no different from a regular network interface. All your computer does is send and receive traffic through that interface, it doesn’t have to worry about how the routing works after that.

By binding your torrent client to that virtual network interface, you’re telling it that it can only send traffic through that interface. If the interface can’t route traffic to the rest of the internet, the torrent client is essentially “blind”. It can’t opportunistically use another network interface instead.

So, if your connection to the VPN goes down, the virtual interface goes down too and the torrent client just stops sending and receiving traffic, all without your real IP address ever being exposed.

Do I really need to bind my VPN to my torrent client?

You might be wondering whether it’s even worth binding your torrent client if you’re already using a kill switch. Well, we’ve tested the kill switches of all the VPNs we review, and what we’ve found is that they’re generally very good but not completely infallible.

Every once in a while, an edge case pops up where a VPN client’s kill switch doesn’t work properly or some traffic ends up bypassing the tunnel. If you want to be absolutely sure that your torrent traffic is protected by a VPN, using VPN binding is the way to go. You’re splitting the trust between the implementation between the torrent client and the VPN. Both would have to fail to expose your home IP when you’re using VPN binding

When it comes down to it, VPN binding is an extra layer of security that takes less than a minute to set up. It’s well worth enabling it in your torrent client just for the added confidence that your IP won’t be exposed while you’re torrenting.