Can the same WireGuard tunnel be used for multiple devices?

Have you tried using the same WireGuard configuration for multiple devices and connecting with the WireGuard VPN server? You may also think if it is possible. So let me explain to make it clear to you.

Well, technically it is possible to do so. Technically, you can connect multiple devices using the same WG configuration file (.conf). I have also tested it by setting up the WireGuard VPN server on the DigitalOcean droplet by deploying an Ubuntu server and it works.

Well though it worked for me and I didn’t find any issue technically it is possible, but it is not recommended.

But why?

Well, WireGuard assigns each peer (device) a unique key pair. While you can theoretically share the same WireGuard configuration across multiple devices, doing so will cause IP conflicts because each device will be assigned the same internal VPN IP address, which may lead to instability and connectivity issues.

Best Practice

It is always best to create a unique key pair and internal IP address for each device to avoid these problems mentioned above. The VPN server will typically be set up to handle connections from multiple clients simultaneously, but each client should ideally have its own unique identity and configuration for seamless performance.