3Com OfficeConnect 3C16771 User Manual page 13

Terminology 13
DoS Attacks — Denial of Service Attacks. An attempt to
stop one of your services running, such as a Web or FTP
server. There are several kinds of DoS attacks.
IP address — The Internet Protocol address is the network
layer address of a device assigned by the user or network
administrator of an IP network. An IP address consists of 32
bits divided into two or three fields: a network number and
a host number or a network number, a subnet number, and
a host number.
IP Spoof — A type of DoS attack. An IP spoof uses a fake
IP address to bypass security settings which may bar access
from the real IP address.
IRC — Internet Relay Chat. Provides a way of
communicating in real time with people from all over the
world.
ISP — Internet Service Provider. A business that provides
Internet access to individuals or organizations.
Internet Firewall — Used in this guide to refer to both the
OfficeConnect Internet Firewall 25 and the OfficeConnect
Internet Firewall DMZ.
LAND Attack — A type of DoS attack. In a LAND attack, a
packet is sent that appears to come from the same address
and port that it is sent to. This can hang the machine to
which it is sent.
Management Station — This is the workstation from
which you run the Web-based management interface for
the Internet Firewall.
Management Interface — This is the Web-based
application which you use to set up the Internet Firewall to
protect your network from attack and to control access to
the Internet for LAN users.
NAT — Network Address Translation. NAT refers to the
process of converting the IP addresses used within a private
network to Internet IP addresses.
NNTP — Network News Transfer Protocol. This protocol is
used to distribute Usenet news articles over the Internet.