Watchguard Firebox X20E Reference Manual page 65

firewall crash opens all traffic in both directions. Fail-shut is the default failure
mode of the WatchGuard LiveSecurity System.
field
An area in a form or Web page in which to enter or view specific information
about an individual task or resource.
file extension
A period and up to three characters at the end of a file name. The extension
can help identify the kind of information a file contains.
filters
Small, fast programs in a firewall that examine the header files of incoming
packets and route or reject the packets based on the rules for the filter.
Firebox
The WatchGuard firewall appliance, consisting of a red box with a purpose-
built computer and input/output architecture optimized as the resident
computer for network firewall software.
firewall
Any technological measures taken to secure a computer network against
unwanted use and abuse via net connections.
firewalling
The creation or running of a firewall.
flash disk
An 8-megabyte, on-board flash ROM disk that acts like a hard disk in a
Firebox.
FTP (File Transfer Protocol)
The most common protocol for copying files over the Internet. See also active
mode FTP.
gateway
The IP address through which messages pass.
graphical user interface (GUI)
The visual representation on a computer screen that allows users to view,
enter, or change information.
header
A series of bytes at the beginning of a communication packet that provide
identification information about the packet such as its computer of origin, the
intended recipient, packet size, and destination port number.
Help system
A form of online information about a software or hardware system.
High Availability
High Availability enables the installation of two Fireboxes on one network in
a failover configuration. At any given moment, one Firebox is in active mode
while the other is in standby mode, ready to take over if the first box fails.
Reference Guide 61