Network Configuration - Black Box ACR2004A User Manual

Network configuration

This page allows you to configure the various aspects of the IP port and its
relationship with the local network.
MAC address
Media Access Control address – this is the unique and unchangeable code that
was hard coded within your Wizard 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 Wizard IP will attempt to
locate a DHCP server on the network. If such a server is located, it will supply
three things to the Wizard 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 Wizard IP remains connected and switched on.
Discover allocations.
To get here
1 Using VNC viewer or a browser, log on as the 'admin' user.
2 Click the 'Configure' button in the top right corner.
3 Click the 'Network configuration' option.
IP Address
This is the identity of the Wizard IP within a network. The
thought of as the telephone number of the Wizard 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.
IP Network 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.
IP Gateway
This is the address of the device that links the local network (to which the
Wizard IP is connected) to another network such as the wider Internet. Usually
the actual gateway is a network switch or router and it will be used whenever a
required address lies outside the current 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.
HTTP Port
This is the logical link through which communications with a remote web
browser will be channelled (see What is a
established standard for web (HTTP – HyperText Transfer Protocol) traffic though
this can be changed to suit your local network requirements.
IP Access Control
This section allows you to optionally specify ranges of addresses which will or
won't be granted access to the Wizard IP. If this option is left unchanged, then
the default entry of '+0.0.0.0/0.0.0.0' ensures that access from all IP addresses
will be permitted. See Setting IP access control
IP address can be
port?). The default setting of 80 is an
for details.
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