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Chapter 7: Using The Router’s Web-based Utility
DMZ
EtherFast Cable/DSL Router with 8-Port Switch
• 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 protocol.
• 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.).
• Ext. Port. Enter the number of the external port used by the server in the Ext. Port column. Check with the
Internet application documentation for more information.
• TCP or UDP. Select the protocol UDP or TCP for each application. You cannot select both protocols.
• Int. Port. Enter the number of the internal port used by the server in the Int. Port column. Check with the
Internet application software documentation for more information.
• IP Address. Enter the IP address of the server that you want the Internet users to be able to access. To find the
IP address, go to “Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter.”
• Enabled. Check the Enabled box to enable the service you have defined. UPnP Forwarding will not function if
the Enabled button is left unchecked. This is disabled (unchecked) by default.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes. For further help on this tab, click the Help button.
DMZ
The DMZ screen allows one local user to be exposed to the Internet for use of a special-purpose service such as
Internet gaming and videoconferencing. Whereas Port Range Forwarding can only forward a maximum of 10
ranges of ports, DMZ hosting forwards all the ports for one PC at the same time.