Introduction: What’s New for 2004

This release of Microsoft® Host Integration Server 2004 offers many new and improved features. These features are highlighted below by product area.

Security Model

This release of Host Integration Server 2004 implements a new security model. The access control for the Host Integration Server 2004 components is based on two Windows security groups specified during setup. The Host Integration Server 2004 runtime group provides access to the Microsoft Windows® account under which all the services run. The Host Integration Server 2004 Admin group is used to provide access to users performing administrative tasks.

Setup and Configuration

Host Integration Server 2004 now installs with a new, Common Setup program used in other Microsoft e-Business products, such as Microsoft BizTalk® Server 2004.

In addition, the Resource Location Wizard has been replaced by a new Configuration Wizard, which allows you to configure all Host Integration Server 2004 services, databases, and subdomain information more efficiently, either during or after setup. A shortcut to the new Configuration Wizard is located in the Host Integration Server 2004 Start menu.

Transaction Integrator

One goal of Host Integration Server 2004 is to enable enterprise developers to move towards a services-oriented architecture (SOA) using the .NET Framework. Transaction Integrator (TI), formerly COM Transaction Integrator for CICS and IMS (COMTI), allows Microsoft Windows developers to publish business rules in mainframe CICS and IMS applications as XML Web services. The new TI Designer runs within Microsoft Visual Studio® .NET 2003, providing a more efficient developer experience. At the same time, TI has been extended to support AS/400 applications by offering a Report Program Generator (RPG) Import Wizard and distributed program call runtime across a TCP/IP network connection.

Host Integration Server 2004 includes innovative technologies, such as TI host-initiated processing (HIP) that offers TCP/IP and SNA listeners that allow a server computer running Windows to function as a peer to IBM mainframe and AS/400 computers. For example, CICS programmers can call into Windows COM+ or .NET server components, as if they were another CICS transaction program by using familiar programming models such as CICS distributed program link (DPL). HIP allows enterprises to more effectively move portions of their application logic or data onto the more cost-effective Windows and SQL Server platforms, while ensuring logical and secure bidirectional application communication.

Host Integration Server 2004 offers industry-standard technologies allowing the network administrator to move towards pure TCP/IP WANs and datacenters. Transaction Integrator supports the CICS enhanced TCP/IP listener and persistent TCP/IP connections.

The new TI allows computers running Windows to extend the functionality of existing IBM mainframe and IBM midrange AS/400 line-of-business (LOB) applications. In Host Integration Server 2004, TI offers both host-initiated processing (HIP) as well as the previously offered Windows-initiated processing (WIP). In Host Integration Server 2004, TI also supports AS/400 applications, as well as mainframe CICS and IMS applications, when integrated across a TCP/IP network connection. TI has been enhanced to offer support for the .NET Framework. Using the new TI Designer, which runs in the context of the Visual Studio .NET 2003 integrated development environment, Windows developers can use TI WIP for .NET to wrap existing LOB applications as XML Web service or .NET server components. In Host Integration Server 2004, the administrator can utilize the new TI Manager which combines TI WIP and HIP Microsoft Management Console (MMC) snap-ins into one view, allowing administrators to efficiently define and manage WIP and HIP component applications.

Finally, TI has a number of other new features, including:

  • An alternative to explicit callback security by using the COMTIContext parameter to pass a user ID and password.
  • Control of the TCP/IP CICS transaction request message (TRM) for interoperability with CICS using TCP/IP custom TRMs.
  • Override of the remote environment (RE), program name, transaction name settings in a type library using the COMTIContext parameter.
  • Support for persistent connections in WIP through client context. In Host Integration Server 2000, COMTI had to open and close a connection each time it made a method call to the mainframe. On the mainframe side, CICS had to start and stop a transaction program. In Host Integration Server 2004, persistent connections allow TI to open a connection for the first method in a group of methods, make all the method calls, and then close the connection. On the mainframe side, CICS starts an instance of the transaction program, keeps the instance active between method calls, and then stops the program after the last call.
  • Support for CICS Enhanced Listener through the enhanced listener message (ELM) programming model. Host Integration Server 2004 takes advantage of the CICS Transaction Server 2.2 Enhanced Listener to provide client and server continuity and improved scalability for both the Transaction Integrator (TI) client and CICS environments through a more streamlined application level protocol exchange sequence. When you use the Enhanced Listener, TI bypasses the transport logic that waits for a TRM reply and immediately sends the application request data after the request header. TI then receives a single data stream and interprets the TRM reply prior to processing the application reply data.
  • Windows Initiated and Host Initiated Single Sign-On (SSO)
  • Arabic EBCDIC 420 bi-directional layout conversion
  • Client Context provides an alternative to Explicit Call Back Security
  • WIP Override RE via Client Context
  • WIP Override Program Name via Client Context
  • WIP Override Transaction Name via Client Context

The additional functionality provided by HIP and other forthcoming features prompted a renaming of the features and functionality that you may be familiar with in earlier versions of Host Integration Server:

  • COM Transaction Integrator for CICS and IMS (COMTI) is now called Transaction Integrator (TI).
  • COMTI Management Console is now called TI Manager.
  • COMTI Component Builder is now called TI Designer.

See Also

Persistent Connections with the Mainframe

Using Custom TRMs and ELMs with COMTIContext

Security Integration

This release of Host Integration Server 2004 ships with Enterprise Single Sign-On (SSO), enabling single sign-on to end users for enterprise application integration (EAI) solutions. SSO is comprised of two main elements:

  • Windows Initiated SSO maps Microsoft Windows accounts to back-end systems
  • Host Initiated SSO allows host requests to access Windows accounts

SSO simplifies the management of user IDs and passwords, both for users and for administrators, by enabling users on host and Windows accounts to access systems more efficiently than before.

In addition, the new Password Sync adapters allow synchronization of passwords. A password sync adapter is an application you create that is registered within the configuration store.

Data Integration

New to this release are a .NET Framework-enabled Managed Provider for DB2 and a DB2 Network Protocol Client (DRDA AR), over which the ODBC, OLE DB, and Managed Provider communicate to the remote DB2 database server. The Data Access Tool and Data Source Wizard allow you to create and manage connection definitions to DB2 and host file systems, and make it easier to define the Host Column Descriptions used to access host data sets.

Additional new features include:

  • Windows Initiated and Host Initiated Single Sign-On
  • DB2 Distributed Transactions (two-phase commit) over TCP/IP
  • DB2 Connection Pooling
  • Arabic EBCDIC 420 bi-directional layout conversion
  • DB2OLEDB support for multiple result sets on calls to DB2 stored procedures
  • SNAOLEDB support access to VSAM data sets from SQL Server DTS
  • UNICODE, Double-Byte, and Mixed-Byte character set support when accessing DB2
  • Ability to import DB2 Connect configuration files
  • Additional DB2 configuration properties such as DBMS Platform (optimizing data conversion across platforms), Default Qualifier (simplifying SQL syntax), and Quoted Prefix (ensuring better support for generic consumers such as SQL Server)

Network Integration

The new IP-DLC Link Service offers support for the industry-standard HPR/IP protocol, which IBM calls Enterprise Extender. This in turn provides SNA connectivity for applications using dependent and independent sessions over a routable IP network. The IP-DLC link service is an add-on feature to the existing SNA protocol node, transmitting each SNA packet across the IP network as a UDP datagram.

From an application perspective, such as a 3270 emulator or WinAPPC program, there is no change in functionality. However, the SNA network traffic from branch-deployed or centrally-deployed Host Integration Server computers can be routed across the IP network directly to an IBM mainframe system running OS/390 V2R10 or later and using an OSA or OSA Express compatible network adapter.

Secure Sockets Layer (SSL) and Transport-Level Services (TLS) allow a network administrator using the TN3270 Service to increase the overall security of the enterprise network when accessing mainframe terminal and printer resources, including authentication of access to mainframe sessions and encryption of data between client emulator and TN3270 server.

Although the Microsoft 3270 Client (emulator) does not support SSL or TLS, many third-party software vendors offer 3270 emulators that support this functionality, including Attachmate, IBM, NetManage, and WRQ.

Software Developers Kit

The Host Integration Server 2004 Programmer's Guide now installs with the core product documentation.

Online Documentation

The new, redesigned Host Integration Server 2004 documentation set is now entirely online. In addition to the documentation that ships with the product, you can download a fully updated documentation set over the Web on a quarterly basis. Some documents are included on your product CD; some documents are available only on the Web.

Perhaps the most important addition to the documentation is the focus on security. In keeping with the Microsoft Trustworthy Computing Initiative, the entire documentation set has been rewritten and now includes the following:

  • The Secure Deployment Guide is a comprehensive source for the latest and most powerful deployment techniques to secure your Host Integration Server environment. This guide is required reading for Administrators, Programmers, and End Users.
  • Understanding Windows Security offers a broad overview of computer security today, describes the STRIDE model for threat analysis, and lists the most common security threats and how to mitigate them.
  • Numerous Security Tips placed throughout the conceptual, procedural, and developer material offer current best practices when and where you need them.
  • General prescriptive guidance appears wherever appropriate in the documentation to help you increase system security, mitigate security threats, and decrease attack surfaces.

What’s New in this Documentation Update

This update of the Host Integration Server 2004 online documentation includes expanded material about the subjects below. This new material can be found in the Network Integration User's Guide.

Configuring IP-DLC Link Service for IBM Enterprise Extender

Host Integration Server 2004 offers an efficient means to integrate Systems Network Architecture (SNA) within data centers, across wide area networks (WANs) and in branch offices through a new link service, IP-DLC (Internet Protocol – Data Link Control), also known as IBM Enterprise Extender. The IP-DLC link service provides SNA connectivity for applications using dependent and independent sessions over a native IP network. This section will assist mainframe programmers and Host Integration Server 2004 administrators in configuring the IP-DLC link service.

Deploying Microsoft Host Integration Server 2004 in a TCP/IP Wide Area Network

This section describes how the IP-DLC (Internet Protocol–Data Link Control) link service of Microsoft Host Integration Server 2004 makes it possible to integrate vital mainframe data and business rules with new e-commerce solutions developed with Microsoft Windows-based programs. The IP-DLC link service of Host Integration Server 2004 enables you to connect directly to IBM mainframe computers through a pure TCP/IP wide area network or local area network. This section contains three detailed scenarios for deployment. Two of these scenarios describe migration from Host Integration Server 2000 to Host Integration Server 2004, and the third describes a new implementation based on Host Integration Server 2004.

Integrating Enterprise Business Processes with Microsoft Windows Using Host-Initiated Processing

This section uses the example of communication between a central data center and multiple branch offices to describe how the Host-Initiated Processing (HIP) feature of Microsoft Host Integration Server 2004 enables such communication. It assumes that the external (branch office) sources of data are likely to be based on Windows-based computing solutions, while the central data center likely relies on legacy data storage systems. HIP makes it possible to bring data from external sources into the legacy batch processing flow without disrupting pre-defined automated processing schedules.

To download updated Host Integration Server 2004 Help from, go to

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