I'm trying to setup a new VPN with Windows 2012 r2. NAT is not used in this network, the server has two NIC's both with Public IP's. I'm using an address pool rather than DHCP. When I use DHCP I don't seem to be able to get an IP assiged to the internal adpater without changing the IGMP Interface. I have virtually the identical setup in Windows 2003 and it works fine. I seem to connect okay but then get error 720, this occurs from both Windows 7 & Windows 10 machines that are able to conncet to the domain internally without any issues.. For Windows Authentication I have EAP, CHAP and MS CHAPv2. I've tried it with and without EAP selected and tried various settings on the the client.
I can see the client connect on the server the only thing I'm not sure about is that under remote Clients it shows the status of Not NAP-Capable.