D-Link DCS-935L User Manual And Service Information page 49

Section 4 - Security
2. View the Network Camera
Click on the Setup button at the top of the screen. Scroll to the bottom of the Network Setup page to display the ports used by HTTP and Streaming
audio and video. If necessary, these ports can be changed if they are already in use by other devices (e.g. in a multiple camera environment).
Note: The HTTP port is required to be opened for the DCS-935L.
D-Link DCS-935L User Manual 49