Ddns Service - Seenergy SVR-504 User Manual

SVR-500 Series
Network Video Recorder

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 configuration of its configured hostnames,
addresses or other information stored in DNS.
A popular application of dynamic DNS is to provide a residential user's
Internet 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.
Please make sure a valid DNS server has been configured under the
"Network Setting" page in order for this function to work properly.
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 gat-
way 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 (de-
fault 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.
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