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Operating Instructions
48
How the DynamicDNS service works
1. Your ISP assigns a global IP address to your Internet access account that
changes periodically. This is the address needed to access the camera over
the Internet.
2. When your ISP-assigned global IP address changes, your camera
automatically notifies the DynamicDNS service server of the new address in
the DynamicDNS. The camera notifies the DynamicDNS service server of the
new address in DynamicDNS in the following cases.
– When starting the camera
– When an update interval time has been set.
– When clicking the [Save] button
3. The DynamicDNS server contacts the Domain Name System (DNS) server
and registers your new global IP address to your chosen DynamicDNS
address (such as "bob.viewnetcam.com").
4. When you enter your DynamicDNS address in your web browser while away
from home or the office, the DNS server looks up the global IP address
assigned to your DynamicDNS address.
5. The DNS server finds your current global IP address and allows you to connect
to your camera.
Note
• Ask your ISP about what type of IP address you are using.
• Some ISPs assign you a local IP address. In this case, the DynamicDNS
service cannot be used.
• If the camera is using a port number other than 80, the port number must
be specified at the end of the DynamicDNS URL. For example:
Using port 80: http://(Cameraname).viewnetcam.com
Using any other port: http://(Cameraname).viewnetcam.com:Port
Number
DynamicDNS service server
ISP
DNS
server
Internet
New address registered with
DNS server
Camera reports new address
Camera connection established
Global IP address
changes
Off-site PC
On-site Network
Camera
DNS looks up
current address
3.
4.
2.
1.
5.