D-Link DCS-5230 User Manual page 66

Section 4 - Security
The Setup > Network Setup page displays the port settings for your camera. If necessary, these ports can be changed
if they are already in use by other devices (e.g. in a multiple camera environment).
Note: Both the HTTP port and RTSP port are required
to be opened for the DCS-5230. Please refer to page
68 on how to open ports in the router.
D-Link DCS-5230 User Manual 66