Appendix; Ddns And Pppoe Network Settings; Advanced Port Forwarding Technology - ICP DAS USA iCAM-MR User Manual

Appendix

DDNS and PPPoE Network Settings

One of the advantages of adopting DDNS and PPPoE services is to save the cost of renting a global IP
address. When you power on a IP camera with a video server and connect to the Internet with the PPPoE
service, the camera asks your ISP for a dynamic global IP address. This Internet-accessible IP address will
be renewed by the ISP every time you log on the Internet.
Whenever the IP is changed, the camera with the video server will notify the DDNS server of your new IP
address. A remote user who intends to connect to the camera with the video server can enter the
domain name in the web browser. The domain name will be translated to a new IP address to be used by
the camera.

Advanced Port Forwarding Technology

Communication port forwarding technology has been widely used to share a global Internet IP to other
devices on the network. The infrastructure of this technology is shown in the below figure, in which the
port 80 of the IP router is forwarded to the device with an IP of 192.168.0.10, and the port 81 of the
router is forwarded to the device with an IP of 192.168.0.11. When a remote PC on the Internet tries to
access the port 81, the user is actually accessing 192.168.0.11, private IP given by the router.
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