Vilfo has several VPN providers already pre-configured. If your VPN provider is missing, you can ask them to get in contact with us and we'll try to integrate them.
You can also manually upload their configuration files to use them until we've been able to integrate them.
There are a couple of prerequisites before integrating a VPN provider:
Having an API that lists all servers & allowing us access to that API
Multiple people have requested the provider
All VPN servers use the same ports and certificates
The provider uses credentials for authentication instead of certificates