So for work, we use an LT2P IPSEC vpn which works simple and easily with both Android and Windows 10. Unfortunately as many people likely know (after a few google searches it seems) the client for this is pretty crap in Ubuntu 16.04.
The two main packages for this is strongswan and xl2tpd. There is apparently some network manager plugins that will allow you to configure a VPN connection directly where you would setup a Wi-Fi or LAN connection using a GUI, but unfortunately, these don’t allow me to enter the correct information to use the VPN the way we have it setup.
Our setup uses a shared PSK, and a username and password.