use endian as a VPN appliance behind another firewall

Hi,

I was wondering if I could use Endian (or any other OPENVPN server, but I’m used to Endian now)  in the following situation :

Roadwarrior user on hotspot or home connection --- INTERNET --- [PUBLIC IP -> NETWORK FIREWALL -> INTERNAL IP 192.168.53.1 ] – SUBNET 192.168.53.0

-          Server 1 : 192.168.53.10

-          Server 2 : 192.168.53.12

-          OpenVPN : 192.168.53.90

The idea is to have remote users VPN into the openvpn server (either using ipsec, or the cert/password way), once authenticated, allow access to the rest of the 192.168.53.0 subnet

The clients would use the openvpn client, or just the built in windows client in case of ipsec vpn

Te network firewall is managed the provider of the wan, but we can ask to open up the required ports to forward to the openvpn server

Any feedback?

Thanks

Olivier