This page allows you to view and modify Telnet related options. For a complete explanation of the Telnet server, please see Computer Management.
Here you can specify which port / address you want ExpertAssist to listen on for telnet connections. This defaults to the standard telnet port of 23, and all available interfaces. Changes take effect when ExpertAssist services are restarted.
Allow the ExpertAssist’s built-in terminal emulator connections to the remote computer. If disabled, the built-in Java client available via Computer Management|Command Prompt page cannot be used to access Telnet.
Specify whether telnet connections will be accepted from the standalone telnet clients on the specified TCP/IP port. If disabled you will only be able to telnet the remote computer using the ExpertAssist’s built-in terminal emulator via Computer Management|Command Prompt page.
Enable or disable the logon message sent by the ExpertAssist’s Telnet Server when a connection is established. The logon message includes the version of the operating system and ExpertAssist.
If you do not want to let anybody who connects to the Telnet ports know the version of the operating system and ExpertAssist, disable this option.
Here you can specify the maximum number of connections to the Telnet Server. It's a good idea to set a reasonable limit, especially on computers connected to the Internet. Every new connection uses resources on the computer.
Here you can set the login timeout (number of seconds the user may remain idle during the login process), the idle timeout (number of seconds the user may remain idle during a Telnet session) and the session recovery timeout. When a Telnet connection is broken ungracefully (that is, the user does not type exit at the command prompt) it is possible to reconnect to the session and continue work where it was left off for a period of time. You can specify the amount of time for which you want the lost telnet session to remain available. Any and all running programs started by the user in the Telnet session will be available when the session is resumed.
Here you can specify the default parameters for the ExpertAssist’s built-in Telnet client . This client is available from the Command Prompt page under the Computer Management object.
Specify the number of columns to be used in the Telnet client window. This number determines the width of the window.
Specify the number of rows to be used in the Telnet client window. This number determines the height of the window.
Select the Console mode from the drop-down list. Select from Stream, Full (ANSI colors) and Full (monochrome).
Select this checkbox to allow the system to prompt the user for the console parameters.
ExpertAssist is able to act as a simple HTTP daemon and serve files from a specified directory. The default Custom Page path and index file is defined in the Custom Pages section on the Appearance page of the Preferences section. All other custom pages are reached from a link on the Custom HTTP default index file.
ExpertAssist supports limited access via wireless devices using the Wireless Application Protocol (WAP). These devices are usually mobile phones, with limited screen size, limited memory, and limited processor capacity. For this reason, they do not understand HTML – pages displayed on WAP devices are written in WML, which is based on XML. Graphics are simple black-and-white images.
When you access ExpertAssist via the WAP interface, you are prompted to log in. Enter your username and password using the phone’s controls then click the OK link. If ExpertAssist does not recognize your WAP device as such, it might cause your WAP browser to display a message regarding unknown content, a compile error, or something similar. In this case, you can edit the contents of the WapClients.cfg file found in your ExpertAssist folder to make the user agent known as a WAP device. Further information on the format of the file is found inside. It is a plain text file and can be edited using any text editor.
With HTTP and the browser interface, you have a fairly simple job securing your communication: simply create an SSL certificate, install the certificate in your browser, and use HTTPS as the protocol.
With the WAP interface, things are more difficult, since your phone does not directly communicate with ExpertAssist. WAP devices connect to a WAP gateway that acts like an intelligent proxy server:
While this is of no concern when browsing WAP pages for stock quotes or weather forecasts, it raises two issues when a secure connection is required:
When using a commercial gateway (such as the ones provided by cell phone companies) the first issue is usually not a problem. However, your cell phone provider will probably not install your self-generated ExpertAssist certificates, so the secure connection between the gateway and ExpertAssist will not be established.
When accessing ExpertAssist from your phone, always use the HTTPS protocol by specifying HTTPS:// in the beginning of the URL. This will encrypt the data sent and received between the gateway and the ExpertAssist installation.
Here is a brief description of how to configure a Nokia7110 to use a WAP gateway:
You will be greeted with an Info screen that displays some essential information about the computer.
At the bottom of this screen (and at the bottom of every screen) you will find the main menu that allows you to select ExpertAssist functions accessible via the WAP interface.
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