Lightning SA MultiCom, User Manual

Page: 156 / 172

Glossary
156 Glossary User’s Manual
While a hacker means an amateur programmer it increasingly is recognized as
meaning a person trying to get unauthorized access to your computer or network
with the purpose of causing damage, stealing or manipulating information.
Host Name
A name that is used to identify and IP address in a way more user-friendly than a
set of numbers alone. While host names are easier to remember they rely upon
some method to translate the name into an IP address (such as using DNS.)
Because of this it may be easier to use just the IP address when troubleshooting
connectivity problems.
Hub
A physical device that contains multiple ethernet ports which allows devices on
different network segments (or cables) to communicate. Data packets that reach
the hub are copied to all of the other ports it is connected to.
Please note that not all hubs can communicate at the same speed. Some hubs
work only at 10Base-T speeds or 100Base-T speeds while some can support
mixed speeds together. Be sure the hub matches your needs and existing
hardware.
ICMP
Internet Control Message Protocol messages are typically messages relating to
network errors, congestion, timeouts of data packets and echoes (used by the ping
command) by a device on the network. These messages are sent in the IP header
and are often sent by a firewall on the path the data packet was traveling.
See RFC792, and RFC1256 for more information on router advertisement and
solicitation.
IKE
Internet Key Exchange (formerly called the ISAKMP/Oakley key exchange)
negotiates the parameters needed to build a secured connection with IPSec. This
occurs using TCP or UDP port 500. After a successful key exchange encrypted
data can travel between the two points.
See RFC2407, RFC2408, RFC2409.
Interface
This is the physical port on the back of your ethernet device. There are many
possible interfaces depending on your model of MultiCom Firewall, the LAN
(also known as the local area network), the WAN (also known as wide area