Chapter 4. Glossary - McAfee FIREWALL 2.1-GETTING STARTED Getting Started

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Glossary
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Address
A data field in a packet header that specifies either the sender or the intended
receiver of the packet. Note that computers can often see data packets that are
not intended for them.
Administrator
The person responsible for handling computer configurations as well as
support.
Allow/Block (packets)
The action to take on a packet. Block means the packet is not sent/received.
Allow means it is sent/received.
ARP
Address Resolution Protocol.
Authentication
The property of verifying that a person or system is who or what it claims to
be. This can be achieved via Virtual Private Networks.
BO
Short for "Back Orifice", a trojan remote control program. This program is
designed to illustrate the serious security breaches that are possible when
using the Windows operating systems. It has been used to cause a lot of
mischief and damage. BO's default setup is to listen on UDP port 31337.
BRKill
An attack program that exploits the security implementation weakness of
Microsoft's TCP/IP. Starting with the IP address and a good guess of a TCP
connection running (particularly on IRC or using PPTP), the attack finds the
TCP packet sequence numbers and then attempts to close the connection by
spoofing a "disconnect" packet.
Broadcast (networks)
A message addressed to all computers on a specified subnetwork.
Getting Started 31