Hello! We had an application that gives our sellers access to the server database everywhere. It connects with the public static IP and a specific port, but the modem of the ISP doesn't allow the configuration of the remote IP address, so basically it's open to everyone. At the moment we had a router connected to the modem, all the pcs are in the router network and almost all the function of the modem are disabled so that the router could provide better security. The only things left are the dmz that design the router as the receiver of all the traffic coming at the modem and the port forwarding toward the router IP. In the router I opened the port requested by the app, the remote IP is the one from wich the app is connecting and the destination is the address of our server. Now the app doesn't connect to the server, am I doing something wrong?