Refer to this video for the solution
https://www.youtube.com/watch?v=UOG-UlXNmDw
Things to do:
- Make sure that the VPN Server's IP assignment is within the DHCP Pool. I was using from 2.2.2.1 when I should have used from 192.168.1.1 (eg 192.168.1.50 to 192.168.1.59)
- Allow UDP 1723 in the Inbound rules of Windows Firewall
- Also in the Inbound Rules, the Public Profile for "File and Printer Sharing (SMB-In), in the Scope Tab add "Internet" to the Remote IP Addresses.