User manual

© MOBOTIX AG • Security Vision Systems • Made in Germany
www.mobotix.com • [e-mail]
124/144
Expansions For The MOBOTIX System
A.1.2 Switch
A switch connects individual network-ready units to one another and delivers data from
the sending units to the receiving units. In larger networks, one or more switches form the
backbone of the system over which the data is transferred to the individual computers and/
or network devices. In a smaller network, this function is normally performed by a router
with multiple network ports (for example, in a home network).
A.1.3 Router
A router is normally used to establish a connection to the Internet. Technically speaking, a
router transfers requests to external IP addresses of computers that are located outside of
the local network. If a router has a sucient number of network ports, it can also perform
the functions of a switch.
A router performs these functions, among others, for the units joined in the network:
•
DHCP: Using this function, individual network devices in the local network (cameras and
computers) are automatically assigned unique IP addresses to enable communication
between these units.
•
Internet Connection: The router establishes a connection to an Internet service provider
(ISP) and receives a unique public IP address (an address that is recognized and
available online). Requests sent to an external IP address (e.g., a website) are sent
to this public address via the router and the results are sent back to the requesting
computer. Normally, a permanent connection to the provider is established.
• DynDNS: Each time the Internet connection is reestablished, the ISP automatically
assigns the router a dierent public IP address (for example, if the provider interrupts
the connection overnight). In order to assign a unique, static name to these dynamic
IP addresses, register with a DynDNS provider (for example,
www.dyndns.org)
and create a unique name for your router and Internet connection (for example,
myhomenetwork.dyndns.org).
This unique name (for example,
myhomenetwork.dyndns.org) is entered into
the router along with the registration information of the DynDNS provider (user name
and password). Each time the router's public IP address is reset by the provider, the
router registers this IP address with the DynDNS provider where the address is then
linked to your unique name.
• Port Forwarding: It is possible to access individual network devices (for example,
cameras) from outside the network using this router feature. A camera is assigned
to a port in the router. This port sends information to the internal network address of
the camera. In conjunction with DynDNS, you can access your first camera as follows:
my-camera.dyndns.org:19801. MxEasy configures the integrated cameras
automatically so that each camera can be used from outside the network as a proxy
camera.
For more information on these services, see Section“ Directly Accessing MOBOTIX Cameras
Via The Internet “ in the Software Manual . DynDNS and Port Forwarding are also dealt
with in
Section 4.9.3 “Connecting Remote Cameras Using DynDNS” .