Ddns - Planet Networking & Communication ICA-E6260 User Manual

2 Mega-pixel PoE Plus Speed Dome IP Camera
ICA-E6260

3.9.3 DDNS

There are surveillance solutions that consist of single cameras scattered over a wide territory,
therefore, each of those cameras should be connected to Internet in order to become
accessible by Control Centers, such as chain stores, bus stops, currency exchange booths,
etc.
In such cases, one of the practical networking solutions is to use DSL modem on camera site
and let the camera obtain the dynamic IP address from the Internet Service Provider through
the DSL modem using PPPoE connection, which is much more cost-effective than applying
for static IP address.
However, there is one drawback in this solution – in order to do the remote surveillance from
the Control Center, the NVR Server in the Control Center has to know the address of the IP
camera at all times in order to get the video stream from the camera. If the camera's network
connection has been reset for any reason, the camera will get a new IP address through DSL
modem, which may be different from the previous one. NVR will not know about this change,
and the connection between the camera and NVR will fail.
There however exists a solution that makes sure the NVR can find the camera even if the
camera IP changes frequently. Our cameras support Dynamic DNS or DDNS service that
allows frequently changing IP be mapped to a certain unchangeable domain name. The
mapping database and its updating engine are hosted in one of the Dynamic DNS servers;
the camera supports PLANET DDNS services for free.
Every time the IP camera gets an IP that is different from previous one, it notifies the public
DDNS Service about the change. The DDNS Service updates its database immediately,
mapping the assigned domain name (for example camera123.planetddns.com) to the new IP
address. In NVR settings, only the domain name (camera123. planetddns.com) is used to
identify the camera. Every time when NVR needs to connect to the camera, it asks from
DDNS Service what the current camera's IP is. The DDNS Service instantly responds to
NVR and tells it the camera's IP. Now NVR will use the IP of the camera to connect to the
camera and the video stream from the camera to NVR can be initiated.
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