Chapter 8 Glossary - Watchguard Firebox X20E Reference Manual

Glossary
CHAPTER 8
This glossary contains a list of terms, abbreviations, and acronyms frequently used
when discussing networks, firewalls, and WatchGuard products.
active mode FTP
One of two ways an FTP data connection is made. In active mode, the FTP
server establishes the data connection. In passive mode, the client establishes
the connection. In general, FTP user agents use active mode and Web user
agents use passive mode.
Address Resolution Protocol (ARP)
A TCP/IP protocol used to convert an IP address into a physical address such
as an Ethernet address.
address space probe
An intrusion measure in which a hacker sequentially attacks IP addresses.
These probes are usually attempts to map IP address space to look for security
holes that a sender might exploit to compromise system security.
AH (authentication header)
A protocol used in IPSec available for use with IPSec Branch Office VPN. AH
provides authentication for as much of the IP header as possible (except for
mutable fields that are nondeterministic, such as TTL fields) and all upper
protocols and payload. It offers the functionality of ESP except for
confidentiality, which ESP's encryption provides.
Alias
Aliases are shortcuts that enable you to identify groups of hosts, networks, or
users with one identifying name. They are used to speed user authentication
and service configuration.
armed
When a Firebox is armed, it is actively guarding against intrusion and attack.
ARP
See Address Resolution Protocol.
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