Watchguard Firebox X20E Reference Manual page 70

Optional interface
An interface that connects to a second secured network, typically any network
of servers provided for public access.
out-of-band (OOB)
A management feature that enables the Management Station to communicate
with the Firebox via a telephone line and a modem. OOB is very useful for
remotely configuring a Firebox when Ethernet access is unavailable.
packet filtering
Controlling access to a network by analyzing the incoming and outgoing
packets and letting them pass or halting them based on the IP addresses of the
source and destination. Packet filtering is one technique, among many, for
implementing security firewalls.
passive mode FTP
See active mode FTP.
PCMCIA (Personal Computer Memory Code International Association) card
A standard compact physical interface used in personal computers. The most
common application of PCMCIA cards is for modems and storage.
permission
Authorization to perform an action.
PLIP (Parallel Line Internet Protocol)
A protocol for exchanging IP packets over a parallel cable.
Policy Manager
One component in the WatchGuard LiveSecurity System, consisting of the
user interface used to modify and upload a Firebox configuration file.
pop-up window
A window that suddenly appears (pops up) when an option is selected with a
mouse or a function key is pressed.
port
A channel for transferring electronic information between a computer and a
network, peripherals, or another computer.
port address translation
See dynamic NAT.
port forwarding
In the LiveSecurity System, an option in which the Firebox redirects IP
packets to a specific masqueraded host behind the firewall based on the
original destination port number.
port space probe
An intrusion measure whereby a hacker sequentially attacks port numbers.
These probes are usually attempts to map port space to look for security holes
which the sender might exploit.
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