Linksys BEFSR81 User Manual page 27

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. (SMTP may also need to be forwarded.)
NNTP (Network News Transfer Protocol) The protocol used to connect to
Usenet groups on the Internet.
SNMP (Simple Network Management Protocol) A widely used network mon-
itoring 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 net-
work. 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 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.
5. Enter the IP address of the server that you want the Internet users to be able
to access. For information about finding the IP address, go to "Appendix F:
Finding the MAC Address and IP Address for Your Ethernet Adapter."
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Instant Broadband Series
®
EtherFast Cable/DSL Router with QoS and 8-Port Switch
®
6. Check the Enable box to enable the services you have defined. UPnP
Forwarding will not function if the Enable button is left unchecked. This is
disabled (unchecked) by default.
Port Triggering
To access the Port Triggering screen (Figure 6-22), used to allow the Router to
watch outgoing data for specific port numbers, click the Port Triggering but-
ton from the Port Range Forwarding screen. The IP address of the computer
that sends the matching data is remembered by the Router, so that when the
requested data returns through the Router, the data is pulled back to the proper
computer by way of IP address and port mapping rules.
1. Enter the Application Name of the trigger.
2. Enter the Trigger Port Range used by the application. Check with the
Internet application for the port number needed.
3. Enter the Incoming Port Range used by the application. Check with the
Internet application for the port number needed.
4. Click the Apply button to apply these settings, or click the Cancel button
to delete any values you've entered.
Figure 6-22
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