I have windows 2019 standard server configured with following roles and its cofigure with static IP 192.168.0.10
Active Directory Controller Server
DNS Server
DHCP Server
VPN Server
I have added Routing Remote Access to the server's firewall
I am using d-link dwr-960 4G router and implemented port forwarding in the router to forward traffic to the VPN Server.
But anytime I try to connect to the VPN Server I get error:
"The remote connection was not made because the attempted vpn tunnel failed. The VPN sever might be unreachable. If this connection is attempting to use an L2TP/IPsec tunnel, the security parameters required for IPsec negotiation might not be configured properly"
I have been trying to resolve this for the past week using all the online suggestion but I have been successful.
I have included relevant pages of the router settings.






