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3.1.2 DDNS Service
DDNS, which stands for “Dynamic DNS”, is a method, protocol, or network
service that provides the capability for a networked device, such as a router
or computer system (in this case, the NVR) using the Internet Protocol Suite,
to notify a domain name server to change, in real time, the active DNS con-
figuration of its configured hostnames, addresses or other information stored
in DNS.
A popular application of dynamic DNS is to provide a residential user’s Inter-
net gateway that has a variable, often changing, IP address with a well known
hostname resolvable through standard DNS queries.
This is useful if the NVR is placed on the Internet with a dynamic public IP,
which once the DDNS is properly setup, users can access the NVR remotely
with the DDNS domain name without worrying if the IP hs changed or not.
The NVR currently only works with free DDNS service provided by “DynDNS”. For
more information, please go to www.dyndns.com
If the NVR is placed behind a router or Internet gateway, please make sure port
forwarding for port 80 is configured on the router or the gatway in order for the
DDNS function to properly register with the service.
It’s often suggested to use
the DDNS function in the router/gateway for such case instead.
Once you have the DDNS function successfully up and running, please DO NOT
forget to configure port forwarding for the NVR web port (default 80) and the
streaming port (default 9877) in the router/gateway for remote viewing. You can
then type in http://yourddnsdomain in the browser to access the NVR remotely
for live view.
