User guide

168 WatchGuard Firebox X Edge
cryptanalysis
The art or science of transferring cipher text into plain text without initial
knowledge of the key used to encrypt the plain text.
CRYPTOCard
An authentication system that uses an offline card to hash encryption keys,
which increases their safety against unauthorized decryption.
cryptography
The art and science of creating messages that have some combination of being
private, signed, and unmodified with non-repudiation.
CSLIP (Compressed Serial Line Internet Protocol)
A protocol for exchanging IP packets over a serial line, which compresses the
headers of many TCP/IP packets.
custom filter rules
Filter rules created in WatchGuard Policy Manager to allow specific content
types through the Firebox.
data
Distinct pieces of information, usually formatted in a special way.
data compression
A way of storing data in a format that requires less space than usual. Data
compression is particularly useful in communications because it enables devices
to transmit the same amount of data in fewer bits.
datagram
A packet of data that stands alone. Generally used in reference to UDP and
ICMP packets when talking about IP protocols.
data transmission speed
The number of bits that are transmitted per second over a network cable.
DCERPC (Distributed Computing Environment Remote Procedure Call)
A call that allows connections bound for port 135 on a machine. These initial
calls typically result in a response from the trusted machine that redirects the
client to a new port for the actual service the client wants.
decompress
To expand a compressed file or group of files so that the file or files can be
opened. See also
compress .
decrypt
To decode data that has been encrypted and turn it back into plain text.
dedicated server
A computer on a network that is assigned to function only as a resource server
and cannot be used as a client.