Q: How is UPNP working?
A: In current software, UPNP only contains port forwarding. It is used to do port forwarding automatically. 
     If you enable UPNP on both your camera and router, camera will automaticly do port forwarding between them. However, 
UPNP is also easily affected by different routers or firewalls, sometimes it may show failed status. In this case, please do port forwarding manually in your router, forward to camera’s ip and port. After that, UPNP succeed or failed has no effect on remote access.