Peer (P2P) to connect to your system from the internet. However, since the P2P connection can be slow, we recommend redirecting the user's setup port on the firewall of his router to allow a quick and direct connection to the camera system.
Proper configuration of the forwarding rules of your router port is a necessary step that must be taken to view cameras anywhere. By default, the router or firewall will block the ports that the DVR or NVR uses to connect. This is not a mistake. It is the basic network security.