We have VPN role on Windows Server 2016 and a Public IP assigned to Server's NIC So users from other sites can connect to the server, It used to work just fine until it was inaccessible and when pinging the server's public IP it is unreachable although the right configuration are set and nothing changed.
The odd thing is when stopping the VPN service on the server the server's public IP become reachable and what is more strange the users used to connect via VPN connection can connect now to the server without initiating VPN connection.
My question is if the security of the server is compromised in this situation and is this considered direct access service? and how to go back to the old working settings when VPN server is started and running and users can connect only when initiating a VPN connection?
Regards.