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Types of camera connections

How to connect the cameras

1. Direct connection of IP camera to the Internet

Fig.1

This method is used when the client has installed many cameras, each of which is connected to the Internet without using a router and all are situated in different locations (they cannot be combined in a single local network). For example: a lot of minor objects in different cities. The basic requirement is to use a static IP address. Disadvantage: poor protection against attacks from the Internet because there is no firewall.

2. IP-camera is connected within a local network. The router has a public (“white”) static IP address.

This connection method is recommended when there is already a local computer network connected to the Internet via a router. Requirements: IP-video camera should have either a static IP address or dynamically receive the same IP address. This method can have several scenarios:

There is a small number of IP cameras within the local framework (1-3 cameras), the router allows making the “Port forwarding” (port redirection).

Fig. 2 “Use of port redirection”

There is a large number of IP-cameras within the local framework (more than 3 cameras), the router allows making the IPSec tunnel.

Fig.3 “Use of IPSec tunnel”

3. IP-camera is connected within the local framework. The router has a private (“grey”) static IP address.

This connection method is recommended when there is already a local computer network connected to the Internet via a router. Requirements: IP-video camera should have either a static IP address or dynamically receive the same IP address. This method can have several scenarios:

There is a small number of IP cameras within the local framework (1-3 cameras), the router allows making the “Port forwarding” (port redirection).

Fig. 4 “Use of port redirection and ISP NAT”

There is a large number of IP-cameras within the local framework (more than 3 cameras), the router allows making the IPSec tunnel.

Fig.5 “Use of IPSec tunnel and ISP NAT”


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