Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

Glossary
MX (mail exchanger)
records
676
Entries in DNS that define where e-mail addresses within domain names get
delivered.
name resolution The process in which name servers supply address and hostname information
to hosts.
name server A network computer that maintains a relationship between IP addresses and
corresponding domain names.
NAS (Network Access
server)
NAT (network address
translation)
A computer that is specially made to receive communications from outside an
organization and distribute them within the organization on its network. It uses
TACACS +, RADIUS, or other protocols for authorization and sometimes for
accounting.
The ability of the Sidewinder G2 to rewrite the source address of a packet to a
new IP address specified by the administrator.
nested rule group A nested rule group is a rule group that you place within another rule group.
network-layer proxy Also known as a circuit proxy. Network-layer proxies check data at the
transport and session (TCP/IP) layers to verify that the data packet complies
with expected standards.
NIC (network interface
controller)
NNTP (network news
transport protocol)
Hardware, like a computer circuit board, that contains a port or a jack that
enables a computer to connect to network wiring (ethernet cable, phone line,
etc.).
The protocol by which network news articles are transferred or read across
the Internet.
node (1) Any network device such as a workstation or server.
(2) The connection point for devices in a network.
non-anonymous FTP An FTP site that can only be accessed by individuals who enter a valid user
name and password.
nslookup (name server
lookup)
NSS (network service
sentry)
NTP (network time
protocol)
A UNIX command that allows you to interactively query a DNS server and
ensure the name server is properly resolving host names and IP addresses.
Manages servers and proxy services on the Sidewinder G2.
A protocol that provides a way to synchronize all clocks on a network, or to
synchronize the clocks on one network with those on another network.
object Generally an item that you can individually select and manipulate, including
shapes and pictures that appear on a display screen, as well as less tangible
software entities.