User guide

User Guide 171
dynamic NAT
(Also known as IP masquerading or port address translation) A method of hiding
network addresses from hosts on the external or on a less trusted network. Hosts
elsewhere on the Internet see only outgoing packets from the Firebox itself.
dynamic packet filtering
Filtering based not only on service types, but also on conditions surrounding the
initiation of a connection.
ECC (Elliptic Curve Cryptosystem)
A method for creating public key algorithms based on mathematical curves over
finite fields or with large prime numbers.
encryption
The process of disguising a message to hide its substance.
entropy
A mathematical measurement of the amount of uncertainty or randomness.
ESMTP (Extended Simple Mail Transfer Protocol)
A protocol that provides extensions to SMTP for sending email that supports
graphics, audio, and video files, and text in various foreign languages.
ESP (Encapsulation Security Payload)
A protocol used in IPSec used with IPSec Branch Office VPN and MUVPN. ESP
encapsulates and authenticates IP packets to be passed over the tunnel,
providing confidentiality, data integrity, and origin authentication. ESP is similar
to AH, except that it provides encryption.
Ethernet
Networking standards, originally developed in 1973 and formalized in 1980,
involving the transmission of data at 10 Mbps using a specified protocol.
Ethernet address
A unique address that is obtained automatically when an Ethernet adapter is
added to the computer. This address identifies the node as a unique
communication item and enables direct communications to and from that
particular computer.
event
Any network incident that prompts some kind of notification.
event processor
See
WatchGuard Security Event Processor .
expand
To display all subordinate entries in an outline or in a folder.
extension
See
file extension .