Gateway
This is the address of the device that links the local network (to which the
AdderLink 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 AdderLink 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
AdderLink IP. The IP access control feature (configurable by a remote admin user)
allows certain network address ranges to be denied access to the AdderLink 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 AdderLink 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 Adder Technology as 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 AdderLink IP will attempt to
locate a DHCP server on the network. If such a server is located, it will supply
three things to the AdderLink 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 AdderLink IP remains connected and switched on.

Discover allocations

IP address
This is the identity of the AdderLink IP within a network. The IP address
can be thought of as the telephone number of the AdderLink 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’.