Linksys BEFW11S4 manual Instant Wireless Series, Wireless Access Point Router with 4-Port Switch

Instant Wireless® Series

The Preset Applications are among the most widely used Internet applications that may require forwarding. They include the following:

•FTP (File Transfer Protocol) A protocol used to transfer files over a TCP/IP network (Internet, UNIX, etc.). For example, after developing the HTML pages for a website on a local machine, they are typically uploaded to the web server using FTP. FTP includes functions to log onto the network, list directories, and copy files. It can also convert between the ASCII and EBCDIC character codes. FTP operations can be performed by typing com- mands at a command prompt or via an FTP utility running under a graphical interface such as Windows. FTP transfers can also be initiated from within a web browser by entering the URL preceded by ftp://.

•Telnet A terminal emulation protocol commonly used on Internet and TCP/IP-based networks. It allows a user at a terminal or computer to log onto a remote device and run a program.

•SMTP (Simple Mail Transfer Protocol) The standard e-mail protocol on the Internet. It is a TCP/IP protocol that defines the message format 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 a telephone number, whether the user is currently logged on, and the last time the user was logged on. The person being “fingered” must have placed his or her profile on the system in order for the information to be available. Fingering requires entering the full user@domain address.

•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.

Wireless Access Point Router with 4-Port Switch

•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, 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 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.

5.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 D: Finding the MAC Address and IP Address for Your Ethernet Adapter.

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.

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