Mocha TN5250 (XP version)

For easy work with IBM AS/400 (System i, iSeries) sessions, try our popular Mocha TN5250 emulator. For a Windows 7/8 version click here
Mocha w32 tn5250 is designed for XP and older OS types. Looking for a Windows 7/8 version click here
Mocha w32 TN5250 for Windows XP   Try it free for 30 days
Price information
24.85 USD (~18 EUR)
250 USD Unlimited site license (*)
Lifetime free upgrades and support

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(*) With a company site license it is possible to install the product on an unlimited number of work-stations.

  • - Supports all standard 5250 emulation features
  • - Alternate screen size (24x80 or 27x132)
  • - SSL (Secure Socket Layer) (see below)
  • - Small and fast. The package is only 807 K byte
  • - User defined functions keys
  • - German and Danish menu/dialog text option + possible to make your own language version
  • - Support for Euro
  • - Mouse wheel support (page up/down)
  • - Device name support
  • - Hotspots (Fx and Fxx text on the 5250 screen can be used as buttons)
  • - Last Transaction Time Indicator
  • - Hardcopy of screen
  • - Mail support
  • - Proxy login
  • - Keyboard macro support
  • - Possible to configure the toolbar
  • - Many trim parameters
  • - Online Help
  • - Installation/Uninstallation programs
  • - Lifetime free upgrades to new versions of the product
  • - Low cost : Single User license 24.85 USD or 250 USD for a Company License.


Information about the SSL option

With the Secure Sockets Layer (SSL) protocol, it is possible to establish a secure connection between the AS/400 and a Telnet client.
Limitations in Mocha TN5250 SSL:
  • - Only support for 128 bit key length.
  • - No validation of the Certificate from the AS/400.

A Certificate is used for the AS/400 to proving its identity. We have selected not to include such an option, as to keep the use of SSL as simple as possible. For most customers the main reason to select the SSL protocol, is to make the data traffic secure.
IBM AS/400 Information Center includes a number of publications about SSL issues.
Make a search for telnet ssl or try i400 Technical Studio (TCP Reference) and select Select Trouble shooting SSL-enabled Telnet server.

This Web page includes a summary of how to build an AS/400 system with SSL support.

We assume below you will NOT use an external Certificate Authority, but generate local digital certificates for your system.

1. Install following AS/400 software programs on the AS/400 (V4R4)
  • - Digital Certificate Manager (DCM), option 34 of OS/400 (5769-SS1)
  • - TCP/IP Connectivity Utilities for AS/400 (5769-TC1)
  • - IBM HTTP Server for AS/400 (5769-DG1)
  • - One of the IBM Cryptographic Access Provider products: 5769-AC2 (56-bit), or 5769-AC3 (128-bit). Notice AS/400 Model 150 uses products 5649-AC5 and 5649-AC6
2. Configure the Digital Certificate Manager

2.1 Start the HTTP Server on the AS/400 as an ADMIN instance.

Issue following AS/400 commands:
  • - 5. Start TCP/IP servers
  • - Server application *HTTP
  • - Server instance *ADMIN

2.2 Start a Web browser as Internet Explorer 4.0/5.0/6.0 on a PC.

Select URL http://your_system_name:2001 A screen with 2 major options will be displayed. Select Digital Certificate Manager
A new screen with a menu is displayed. Select Certificate Authority (CA)
Select Create a Certificate Authority, and fill out the form. In our test case, we selected key length 512.

We must now assign the new certificate to the Telnet Server.
Go back to the main menu, and select System Certificates. Select work with secure applications
Click the button next to the application QIBM_QTV_TELNET_SERVER.
Select Work with system certificate
Select the Certificate to use.
Click Assign new certificate.
Verify a Yes is displayed next to QIBM_QTV_TELNET_SERVER. If it says No, there is something wrong.
3.0 Start Telnet Server on the AS/400.
At an AS/400 prompt write: 

4.0 Verify the Telnet Server is ready for a SSL session

At an AS/400 prompt write: 
If the Telnet server is ready, a local port with the text telnet- should be displayed. Actually the port text is telnet-ssl, but it is truncated in the default display. 

5.0 Start Mocha 5250

If Netstat displayed the correct information's, start mocha w32 tn5250, and select menu - file - connect - advanced -
Enable the SSL option.
Press Ok , Ok, and if the SSL session works correct, the status line in mocha tn5250 will display ONLINE-SSL.  

If it does not work, check the IBM documentation for the AS/400. We can only offer very limited support on AS/400 configuration. Please use the IBM support function for such issues.