i am an iOS developer, i want to use OpenVpn as a middle server for user authentication and then limit all traffics that comes to the backend server (main server) except the OpenVpn server , so it's safe and i have a powerful authentication for my users.
user--->OpenVpn<---backend server
the app has more than 1150 user, i am a little bit confused! can i use the free version of the OpenVpn for no? because it will cost me at least 7000$.
right now i need the cheapest way for sure.
Thanks for your time
