Ddns & P2P - Planet Networking & Communication ICA-E3550V User Manual

5 Mega-pixel Bullet IR PoE IP Camera
ICA-E3550V
be used when the connection to the Primary DNS Server fails.
After changing any of the items above, press Apply to save the changes. The Reset button undoes the
changes that had just been made but not Applied yet.
3.8.3 DDNS and P2P
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, most of which offer basic services for
free, such as www.dyndns.org.
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.dyndns.org) to the new IP address. In NVR settings,
only the domain name (camera123.dyndns.org) 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
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