My router only has UPNP option, how do I do so I can watch camera remotely on webpage ?

1.Enter the camera’s web page to modify the camera’ s http port,(don’t use 80,81,82.Range is 80-65535)
2.Enter the router,open the UPNP,then on the camera’s web page to refresh the UPNP.
If the status shows "Fail",please click Refresh.
If status shows “succeed”,so UPNP is set successfully. You can watch the video on webpage from outside.

But if status shows “fail” always,please reboot the camera,then refresh the UPNP again,and refresh the router’s UPNP too.