D-Link NetDefend DFL-CP310 User Manual page 471

other ways intentionally breaches
computer security. The end result is
that whatever resides on the
computer can be viewed and
sensitive data can be stolen without
anyone knowing about it.
Sometimes, tiny programs are
'planted' on the computer that are
designed to watch out for, seize and
then transmit to another computer,
specific types of data.
HTTPS
Hypertext Transfer Protocol over
Secure Socket Layer, or HTTP over
SSL.
A protocol for accessing a secure
Web server. It uses SSL as a
sublayer under the regular HTTP
application. This directs messages to
a secure port number rather than the
default Web port number, and uses a
public key to encrypt data
HTTPS is used to transfer
confidential user information.
Hub
A device with multiple ports,
connecting several PCs or network
devices on a network.
I
IP Address
An IP address is a 32-bit number that
identifies each computer sending or
Glossary of Terms
receiving data packets across the
Internet. When you request an
HTML page or send e-mail, the
Internet Protocol part of TCP/IP
includes your IP address in the
message and sends it to the IP
address that is obtained by looking
up the domain name in the Uniform
Resource Locator you requested or
in the e-mail address you're sending
a note to. At the other end, the
recipient can see the IP address of
the Web page requestor or the e-mail
sender and can respond by sending
another message using the IP address
it received.
IP Spoofing
A technique where an attacker
attempts to gain unauthorized access
through a false source address to
make it appear as though
communications have originated in a
part of the network with higher
access privileges. For example, a
packet originating on the Internet
may be masquerading as a local
packet with the source IP address of
an internal host. The firewall can
protect against IP spoofing attacks
by limiting network access based on
the gateway interface from which
data is being received.
Glossary of Terms
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