SnapGear VPN Router User Manual page 7

IDB
Internet
Intranet
IPSec
LAN
LED
MAC Address
Masquerade
NAT
Net Mask
NTP
PAT
Introduction
Intruder Detection and Blocking. A feature of your SnapGear VPN Router that
detects connection attempts from intruders and optionally blocks all further
connection attempts from the intruders' machine.
A worldwide system of computer networks - a public, cooperative, and self-
sustaining network of networks accessible to hundreds of millions of people
worldwide. Technically, what distinguishes the Internet is its use of a set of
protocols called TCP/IP.
A private TCP/IP network contained within an enterprise.
Internet Protocol Security. IPSec provides interoperable, high quality,
cryptographically based security at the IP layer, thus offering protection for all
network communications.
Local Area Network.
Light-Emitting Diode.
An Ethernet address set by the manufacturer.
The process by which a gateway on the local network modifies outgoing packets
to replace the source address of these packets with its own IP address. In this
way, all IP traffic originating from the local network appears to come from the
gateway itself and not the machines on the local network.
Network Address Translation. The translation of an IP address used on one
network to another IP address known on another network.
The way that computers know which part of a TCP/IP address refers to the
network, and which part refers to the host range.
Network Time Protocol (NTP) is used to synchronize clock times in a network
of computers.
Port Address Translation. The translation of a port number used on one network
to another port number known on another network.
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