Filter
Top Products
EtherFast
®
Cable/DSL Routers
59
Instant Broadband
™
Series
• Telnet A
terminal
emulation
protocol
commonly
used on the
Internet and
TCP/IP-
based net-
works. It
allows a user
at a terminal
or computer
to log onto a
remote
device and
run a pro-
gram.
• SMTP
(Simple
Mail
Transfer
Protocol)
The stan-
dard e-mail
protocol on the Internet. It is a TCP/IP protocol that defines the message for-
mat and the message transfer agent (MTA), which stores and forwards the
mail.
• DNS (Domain Name System) The way that Internet domain names are
located and translated into IP addresses. A domain name is a meaningful and
easy-to-remember “handle” for an Internet address.
• TFTP (Trivial File Transfer Protocol) A version of the TCP/IP FTP proto-
col that has no directory or password capability.
• Finger A UNIX command widely used on the Internet to find out informa-
tion about a particular user, such as telephone number, whether currently
logged on or the last time logged on. The person being “fingered” must have
placed his or her profile on the system. Fingering requires entering the full
user@domain address.
58
• HTTP (HyperText Transport Protocol) The communications protocol used
to connect to servers on the World Wide Web. Its primary function is to
establish a connection with a Web server and transmit HTML pages to the
client web browser.
• POP3 (Post Office Protocol 3) A standard mail server commonly used on
the Internet. It provides a message store that holds incoming e-mail until
users log on and download it. POP3 is a simple system with little selectivity.
All pending messages and attachments are downloaded at the same time.
POP3 uses the SMTP messaging protocol.
• NNTP (Network News Transfer Protocol) The protocol used to connect to
Usenet groups on the Internet. Usenet newsreaders support the NNTP pro-
tocol.
• SNMP (Simple Network Management Protocol) A widely used network
monitoring and control protocol. Data is passed from SNMP agents, which
are hardware and/or software processes reporting activity in each network
device (hub, router, bridge, etc.) to the workstation console used to oversee
the network. The agents return information contained in a MIB
(Management Information Base), which is a data structure that defines what
is obtainable from the device and what can be controlled (turned off, on,
etc.).
You must check the Enable box to enable the applications you have defined.
To add a server using UPnP Forwarding:
1. Enter the name of the application in the appropriate Application Name
field.
2. Next to the name of the application, enter the number of the external port
used by the server in the Ext. Port column. Check with the Internet appli-
cation software documentation for more information.
3. On the same line, select the protocol UDP or TCP.
4. Enter the number of the internal port used by the server in the Int. Port col-
umn. Check with the Internet application software documentation for more
information.
Figure 8-17