How to set up a VPN server on android?

Question

Android

Hello!
It is necessary to connect several phones to the network via the Internet. I thought VPLS through MPLS labels through a provider, but a bunch of agreements are needed, since different providers. EoIP / IPSec will not work, because not all routers support it, I generally keep quiet about GRE! What protocol to use and how to set up a vpn server on android?! If this is not possible, then write what to use to solve the above problems!
Be sure to help, please!
Thanks in advance for your replies!!!

Answer 1

You raise the VPN server on the server
and on the phones - clients,
or you can gnaw on cacti
https://forum.xda-developers.com/showthread.php?t=...