Stormshield SN series Configuration Manual page 442

SNS - USER CONFIGURATION MANUAL V.3
GLOSSARY
PAT (Port Address Translation)
Modification of the addresses of the sender and recipient on data packets. Changes in IP address
involve the PAT device's external IP address, and port numbers, instead of IP addresses, are used
to identify different hosts on the internal network. PAT allows many computers to share one IP
address.
Peer-to-peer
Workstation- to- workstation link enabling easy exchange of files and information through a
specific software. This system does not require a central server, thus making it difficult to
monitor.
Ping (Packet Internet Groper)
An internet utility used to determine whether a particular IP address is accessible (or online). It is
used to test and debug a network and to troubleshoot internet connections by sending out a
packet to the specified address and waiting for a response.
PKI (Public Key Infrastructure)
A system of digital certificates, Certificate Authorities and other registration authorities which
verify and authenticate the validity of parties involved in an internet transaction.
Plugin
An auxiliary program that adds a specific feature or service to a larger system and works with a
major software package to enhance its capacity.
Port redirection (REDIRECT)
The use of a single IP address to contact several servers.
Port scanning
A port scan is a technique that allows sending packets to an IP address with a different port each
time, in the hopes of finding open ports through which malicious data can be passed and
discovering flaws in the targeted system. Administrators use it to monitor hosts on their networks
while hackers use it in an attempt to compromise it.
PPP (Point-to-Point Protocol)
A method of connecting a computer to the internet. It provides point-to-point connections from
router to router and from host to network above synchronous and asynchronous circuits. It is the
most commonly used protocol for connecting to the internet on normal telephone lines.
PPPoE (Point-to-Point Protocol over Ethernet)
A protocol that benefits from the advantages of PPP (security through encryption, connection
control, etc). Often used on internet broadband connections via ADSL and cable.
PPTP (Point-to-Point Tunneling Protocol)
A protocol used to create a virtual private network (VPN) over the Internet. The internet being an
open network, PPTP is used to ensure that messages transmitted from one VPN node to another
are secure.
Private IP Address
Some IP address ranges can be used freely as private addresses on an Intranet, meaning, on a
local TCP/IP network. Private address ranges are
172.16.0.0 to 172.31.255.255
192.168.0.0 to 192.168.255.255
10.0.0.0 to 10.255.255.255
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