Our third party IT provider left us. We need to get a VPN connection setup with a client as soon as possible. I am mostly a software guy and networking is beyond my scope. We have been provided the Peer IP address and the NAT of the local machine we will be hitting on their end. We were also sent a PSK but no other credentials (they might send when we are ready to test I guess).
Whats the best tutorial to get the job done. They provided no specs on their end and we need to accomplish this connection as soon as possible. Is it not as simple as opening the IP on our firewall and creating a new network connection using the VPN option?