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Network configuration
This page allows you to
configure the various
aspects of the IP port and its
relationship with the local
network.
Network Config
Net Mask
255.255.255.0
192.168.42.154
No
Gateway
VNC Port
HTTP Port
5900
80
Clear IP Access Control
Cancel
Save
IP Address
00:0F:58:00:00:04
Use DHCP
MAC Address
Gateway
This is the address of the device that links the local network (to which the CPU IP
is connected) to another network such as the Internet. Usually this is a network
switch or router and it will be used whenever a device to be contacted lies
outside the local network.
VNC port
This is the logical link through which communications with a remote VNC viewer
will be channelled (see
What is a port?
). The default setting is 5900 which is
a widely recognised port number for use by VNC software. However, in certain
circumstances it may be advantageous to alter this number - see
Security issues
with ports
for more details.
Note: The VNC port and HTTP port can be set to the same port number in order
to simplify router and firewall configuration. If this is done then the CPU IP will
“listen” for both types of traffic on the single port.
HTTP port
This is the logical link through which communications with a remote web
browser will be channelled. The default setting of 80 is an established standard
for web (HTTP – HyperText Transfer Protocol) traffic though this can be changed
to suit your local network requirements.
Clear IP access control
This option removes all entries from the IP access control feature within the
CPU IP. The IP access control feature (configurable by a remote admin user)
allows certain network address ranges to be denied access to the CPU IP. If set
incorrectly, it is possible to exclude all network users and so this option provides
an emergency recovery point.
MAC address
Media Access Control address – this is the unique and unchangeable code that
was hard coded within your CPU IP unit when it was built. It consists of six 2-
digit hexadecimal (base 16) numbers separated by colons. A section of the MAC
address identifies the manufacturer, while the remainder is effectively the unique
electronic serial number of your particular unit.
Use DHCP
DHCP is an acronym for ‘Dynamic Host Configuration Protocol’. Its function is
particularly useful when connecting to medium size or larger networks, such
as the Internet. When this option is selected, your CPU IP will attempt to locate
a DHCP server on the network. If such a server is located, it will supply three
things to the CPU IP: an IP address, an IP network mask (also known as a Subnet
mask) and a Gateway address. These are not usually granted permanently, but
on a ‘lease’ basis for a fixed amount of time or for as long as the CPU IP remains
connected and switched on.
Discover allocations
.
IP address
This is the identity of the CPU IP within a network. The IP address can be
thought of as the telephone number of the CPU IP. Unlike the MAC address,
the IP address can be altered to suit the network to which it is connected. It can
either be entered manually or configured automatically using the DHCP option.
When the DHCP option is enabled, this entry is greyed out.
Net mask
Also often called the ‘subnet-mask’, this value is used alongside the IP address
to help define a smaller collection (or subnet) of devices on a network. In this
way a distinction is made between locally connected devices and ones that are
reachable elsewhere, such as on the wider Internet. This process helps to reduce
overall traffic on the network and hence speed up connections in general.
To get here
1 Use the local keyboard and log on as the ‘admin’ user.
2 Press
(hotkeys may be different).
3 Select ‘Configuration’.
4 Select ‘Network configuration’.
