LOREX Technology Surveillance Systems User Manual
Consu
Guide
THE BASICS OF REMOTE
VIDEO ACCESS
mer
English Version1.0
Copyright © 2006 Lorex Technology Inc.
ww.lorexcctv.com
Table of Contents
Introduction............................................................................................................................................................. 2
Background to the Technology............................................................................................................................... 3
Types of Surveillance Systems.......................................................................................................................... 3
What is the difference between Local and Remote Network Surveillance?...................................................... 3
How do I configure my gateway/router?............................................................................................................. 5
How to I locate the video devices?..................................................................................................................... 5
What is the difference between a Static and Dynamic IP Addresses? .............................................................. 6
What is the difference between an internal and an external IP Addresses? ..................................................... 6
What is port forwarding? ................................................................................................................................... 7
What is Domain Name Service (DNS)?............................................................................................................. 7
What does a Dynamic DNS service do?............................................................................................................ 7
Implementing Remove Access............................................................................................................................... 7
Where is the best place to start?....................................................................................................................... 7
What does setting up a gateway/router involve?................................................................................................ 8
Is Dynamic DNS really necessary?.................................................................................................................... 8
What do I need on the client side to display video?........................................................................................... 8
Glossary.................................................................................................................................................................. 8
Conclusion.............................................................................................................................................................. 9
Introduction
There are many video surveillance products available today that allow the video signals to be accessed via
digital, network connections. These products are suitable for use over Internet connections, allowing access from
anywhere in the world. However, many users are not familiar with the technologies needed to get this to work
reliably.
This document provides a background to networking and remote network access concepts pertaining to video
surveillance and is intended to give the Do-It-Yourself user a fundamental understanding of key concepts for all
network video products.
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Background to the Technology
Types of Surveillance Systems
In discussing video surveillance systems there are three types to consider;
– Direct Surveillance
– Local Network Surveillance
– Remote Network Surveillance
Direct Surveillance Systems display the video images on a monitor or PC-system screen without using a data
network, as shown in the following figure. Only the cameras connected to the monitor or the PC-system can be
viewed on their respective systems;
PC Video System
Monitor
Figure 1: Direct Surveillance Systems
Network Surveillance systems use a data network to connect to the video devices, so that the video signals can
be accessed using a digital data protocol across the network. To do this the devices need to be designed for
Internet Protocol (IP) networking.
What is the difference between Local and Remote Network Surveillance?
If you wish to view the video images from any of the network-enabled video devices using a viewer application or
web browser that is connected to the Local Area Network(LAN), such as the PC(a) in the figure below, then this
is considered local network surveillance. In this case the video signals never reach the Internet and there is no
special setup required. If you wish to view the video from a network location not directly connected to the LAN
you must go through the Internet. This is considered remote network surveillance and remote access
configuration is required. The two figures below illustrate the differences between these.
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