D-Link DCS-5230L User Manual page 51

Appendix A - Installing the DCS-5230L on a Router Without UPnP
3) Open the HTTP Port
The HTTP port option under Port Detail Settings is used when multiple
cameras are being installed behind a single public IP address and will be
accessed remotely OR for using a port other than the default port for image
viewing. For each additional camera that is installed, you must assign the
appropriate Web server port for each camera to enable remote viewing.
By default, port 80 (Web server port) is open. If these ports are available
for use, you DO NOT have to open a second port and can proceed to the
next section.
If port 80 is not available (for example, if you are already using port 80 to
run a Web server or your ISP blocks access on port 80), you MUST open
a second port and designate a new Web server port (800, 801, 802, etc.).
Similarly, if port 554 is not available, you will need to open a different port
for RTSP.
Note: Be sure to take note of these settings since these same settings will be used to configure your router.
Note: Some ISPs block traffic on commonly used ports like port 80 to disallow consumers from putting a server on
their network. Be sure to check with your ISP so that you can open the appropriate ports accordingly. If your ISP does
not pass traffic on port 80, you will need to change the Web server port the camera uses from 80 to something else,
like 800. If you are behind a residential gateway, you will need to open a corresponding port on your gateway as well.
Not all gateways are the same. Please refer to your gateway's user's manual for specific instructions on how to forward
ports.
D-Link DCS-5230L User Manual 46