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Network Management & Monitoring

TCP/IP FOR VSE

Transmission Control Protocol/Internet Protocol

Platform: VSE
TCP/IP FOR VSE  provides a complete solution for connecting the mainframe to today's Internet world.

U.S. Patent: 11,108,671


  • Our TCP/IP stack provides a seamless interface with the Internet, allowing VSE mainframe applications to participate fully in the global business arena
  • Built-in tools make VSE functions and facilities immediately available to network-attached users
  • Optional and third-party products bring the full power and reliability of mainframe computing to the e-Commerce world
  • Standard stack features
  • Runs on a range of operating system versions
  • 2.3.x is running on 21st Century Software's VSEn V6.3 and IBM's z/VSE V6.2*
  • 2.2.x is for running on IBM's z/VSE V6.2
  • 2.1.x is for running on IBM's z/VSE V6.1
  • 1.5F/G is for running on IBM's z/VSE V5 and below

*Note: 2.3.x will also run on older z/VSE releases. These older z/VSE releases are out of service for technical support from IBM, but CSI will support TCP/IP FOR VSE unless the issue is related to the operating system

  • Supports network connections via OSA (LCS) and OSA-Express® adapters in an Ethernet network. Some legacy network types are still accepted.
  • Extensive monitoring and tuning capabilities that can be extended to any level of granularity, including specific destination addresses
  • Customizable security features protect both network access and configuration information
  • Built-in connection management provides request queuing and automatic detection and clean-up of “lost” connections
  • A complete set of servers, including TN3270, FTP, and LPD
  • Client software such as FTP, LPR, Email, and Telnet
  • Additional support software, such as PDF creation
  • Additional optional features distributed with TCP/IP FOR VSE:
  • CSI Firewall Shield—Network Security
  • GPS—General Print Server
  • SecureFTP—SSL/TLS-enabled FTP server and client
  • SSL/TLS—Secure Sockets Layer/Transport Layer Security
  • CSI internal cryptographic services for applications using SSL 3.0, TLS 1.1, and TLS 1.2 protocols
  • OPENSSL third-party cryptographic services for applications using TLS 1.2 and TLS 1.3 protocols
  • See-TCP/IP—Performance monitor for VSE and TCP/IP
  • Standard features of TCP/IP FOR VSE to consider implementing:
  • FTP—File Transfer Protocol
  • Easy, direct access to VSAM, BIM-Edit, LIBR, VSE/POWER, ICCF, and other VSE resident files
  • VSAM KSDS files can be retrieved completely or by key range
  • FTPBATCH for quick, easy, efficient batch FTP transfers
  • Automatically send VSE/POWER files directly to end users
  • Convert text files to PDF format for easy viewing
  • Allow users and applications to retrieve and store files on Windows, Linux, z/OS, z/VM, or any other platform running the TCP/IP protocol
  • Securely transfer confidential files with the SecureFTP feature
  • Telnet TN3270 server
  • Allow users to log directly onto 3270 VTAM applications such as CICS
  • End users use a TN3270 PC client to directly access the VSE system
  • LPR client for printing directly to printers on remote hosts
  • Automatic printing of VSE/POWER LST queue entries to remote printers
  • Multiple printing solutions
  • General Print Server (GPS) services for sending CICS VTAM TN3270 printer data to remote LPD servers running on any other platform
  • LPR client for sending VSE/POWER queue files to any other platform running an LPD server
  • LPD server on VSE for receiving printer data into the VSE/POWER queue from any platform running an LPR client
  • PDF conversion service to turn VSE/POWER LST queue files into PDF format that can then be sent directly from VSE to any other platform using FTP or EMAIL
  • Email
  • Batch client to email most VSE-resident files directly to remote users
  • PDF generation of text and embedded graphics is also available
  • Web
  • Provide static HTML pages to any browser
  • Easy configuration with standard VSE library members
  • Ping, Traceroute, DISCOVER, and other powerful tools allow a site to analyze its TCP/IP network from VSE
  • Advanced diagnostics for detailed problem analysis
  • User-defined security processing to limit access or functions to a remote user or group of users
  • Control message output and, if you have CSI's FAQS/ASO® product, inspect TCP/IP FOR VSE activities and automate VSE processing; for example, submit a job when an FTP has completed
  • Create your own TCP/IP FOR VSE applications with the provided Application Programming Interfaces (APIs):
  • SOCKET MACRO interface for Assembler programs
  • BSD/C interface useable from C, COBOL, Assembler, or any other language that supports standard linkage
  • EZASOCKET calls by all languages are also supported for easier portability
  • High-Level Preprocessor Interface for COBOL, PL1, or Assembler
  • Cryptographic interfaces for using SSL/TLS with strong encryption algorithms like AES, Triple-DES, RSA, or SHA1, MD5, and support for third-party OPENSSL cryptographic services
  • Socket interface for REXX programs
  • Examples are available to speed up program development

Data Sheet

TCPIP for zVSE
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Required Components


Optional Components


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