how to use setting the VPN server for in-built windows 10

https://channel9.msdn.com/Series/Windows-Server-2012-Entry-Level/Windows-Server-2012-Entry-Level-11

https://www.youtube.com/watch?v=5GWIHv94KPM


http://www.thewindowsclub.com/configure-vpn-connection-windows



for ubuntu client setting

https://torguard.net/knowledgebase.php?action=displayarticle&id=54

notice

if your router or computer did not have the DHCP  pleas set the IP address to the incoming connection