Telnet Designer Tools

In this section:

Telnet Designer offers the following selections under the Tools menu:


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Emulator Tool

Access the Emulator tool from either the main menu (Tools, then Emulator) or from the Emulator tool icon. The Terminal Emulator dialog box opens with the Connection tab displayed, as shown in the following image. In this window, you set the parameters that allow you to connect to the system you want to emulate, and select the Telnet Designer mode in which you will work.

The following table lists and describes the parameters available in the Terminal Emulator Connection tab.

Parameter

Description

Host

DNS name or IP address of the system you will connect to for the emulation session.

Terminal

Type of terminal you will use for the emulation. The available selections are tn3270 and tn5250.

SSL/TLS

This option allows you to enable a Secure Sockets Layer (SSL)/Transport Layer Security (TLS) security connection.

Port

Port number of the connection.

Mode

Emulation mode that Telnet Designer will use for the session. The modes are Emulation, RPC (Remote Procedure Call), Web, and Rec (Recorder).

Click Run to connect to the designated system. Click Cancel to exit the Terminal Emulator dialog box.

The Advanced tab of the Terminal Emulator dialog box is shown in the following image. The Advanced tab provides additional settings to further define the connection.

The following table lists and describes the parameters available in the Terminal Emulator Advanced tab.

Parameter

Description

Extended Attributes

Allows the session to send extended attributes from the back-end application. These attributes are returned to the application without modification. The following attributes are allowed: background color, character set, field outlining, field validation, and foreground color.

Note: If you select a code page in the Language parameter that supports double byte character set (DBCS) code pages, the extended attributes parameter is the default.

Language

The code page for the language used by the host system.

LU Name

Allows 3270 application users to specify a particular terminal name (LU) or Pool name (LU pool) to use in its connection with the mainframe. As a result, the mainframe can then dedicate specific connections and privileges to specific telnet ports.

Click Run to connect to the designated system. Click Cancel to exit the Terminal Emulator dialog box.

The Security tab of the Terminal Emulator dialog box is shown in the following image. When the SSL/TLS check box is selected in the Connection tab, the Security tab provides additional security settings that must be defined.

The following table lists and describes the parameters available in the Terminal Emulator Security tab.

Parameter

Description

SSL Version

Select one of the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocol versions to use for the connection:

  • SSL v3
  • TLS v1

By default, TLS v1 is selected.

Server Certificate

Select one of the following server certificate options:

  • Always Accept
  • Ask Before Accepting

By default, Always Accept is selected.

Preferred CipherSuite

Select an available CipherSuite to use for the connection from the drop-down list.

By default, None is selected.

The implementation of the SSL/TLS security connection relies on the implemenation of Oracle Java Secure Socket Extension (JSSE). JSSE is included as a standard component of JRE Version 1.4 and higher. SSL Version 3.0 and TLS Version 1.0 are currently supported by iWay Emulation Adapter (3270/5250).

iWay Emulation Adapter (3270/5250) uses its own trust store file to store server certificates. The file is called iway_telnet_jssecacerts and will be created in the following directory:

<JRE-home>\lib\security

If the Always Accept value is selected in the Security tab of the Telnet Designer for the Server Certificate parameter or ACCEPTCERTIFICATE='1' is included in the RPC scripts, then an unrecognized server certificate will be stored in the trust store file. If the Ask Before Accepting value is selected in the Security tab of the Telnet Designer for the Server Certificate parameter or ACCEPTCERTIFICATE='2' is included in the RPC scripts, then a dialog window with the certificate information is displayed and you must decide whether or not to accept the server certificate.

You can also select a cipher suite to use for encryption and integrity check purposes. However, it is possible that a server may not support the preferred cipher suite and a connection will not be established as a result. If no preferred cipher suite is selected, the Telnet client will negotiate with the server based on a set of cipher suites and use one that both parties can support.

The Record mode of the Telnet Designer still records unencrypted data. As a result, you can not use SSL/TLS to connect to a player server, even if the recorded dump is recorded from a SSL/TLS session.



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Player Server Tool

To access the Player Server tool, click Tools from the menu bar and select Player Server. You can also click the Palyer Server icon on the toolbar. The Player Server dialog box opens, as shown in the following image.

The Player Server dialog box allows you to run prerecorded emulations that were created in Recorder mode. A selection of prerecorded emulation files appears in the Available Dumps list. Click Run to activate the selected simulation. Click Cancel to exit the Player Server.


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Options

You can edit certain attributes for the Emulator and Player Server tools through the Options dialog box. To access the Options dialog box, click Tools from the menu bar and select Options.

The available options appear in the Options dialog box under the following tabs:

The Options dialog box is shown in the following image with the Emulator tab selected.

The following table lists and describes the Emulator options.

Option

Description

Font Size

Determines the font size of the emulation.

Auto Reconnect

Automatically re-establishes the emulator session if the connection to the host is lost.

The Options dialog box is shown in the following image with the Player Server tab selected. These options set the attributes used when running the Player Server tool to connect to a recorded dump.

The following table lists and describes the Player Server options.

Option

Description

Initial Port

The port on the local machine used to connect to a recorded dump. Each new player session will automatically select a new port number in this port sequence, adding one to the previous port number.

Max sessions

The maximum sequence of port numbers allocated to the player server. As each new player session is opened, a new session in this sequence of numbers will be assigned. Port numbers in the sequence are reused after all numbers in the sequence have been assigned. This also indicates the maximum concurrent number of player sessions that can be in use.

Min Threads

The minimum number of processing threads that are allocated to the current player session.

Click OK to activate the settings. Click Cancel to exit the Options dialog box.


iWay Software