D-Link DCS-5020L User Manual page 38

Section 4 - Configuration
Note: You MUST also set up your router/gateway for Port Forwarding/Mapping; this will enable remote viewing of your camera via the Internet. Please
refer to your router's instruction manual on how to open up ports (port forward). For additional help on configuring your camera to work with your router,
please refer to Appendix A: Installing the DCS-5222L on a Router Without UPnP. For installing multiple cameras, ONE port per camera must be opened
on your router, in addition to the Web server (HTTP) port which is used for configuration. Also, some browsers may restrict some ports, such as 1 or 22, for
security purposes. If you have problems accessing your camera through HTTP, try using a port higher than 1024.
After making any changes, click the Save Settings button to save your changes, or click the Don't Save Settings button to discard your changes.
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