Operating Systems

• Authentication: userids, passwords, key pairs, tokens, etc.

• Authorization: controlled access to files and system resources

• Network security, firewalls, etc.

• “Data at rest”: security of intermediate files created as data is transformed or relayed.

Meeting these requirements with z/OS alone can be a nightmare. Many excellent z/OS products are available to address these issues, but their combinations can be complex and costly. Each often involves a new, unique configuration of tools, Job Control Language (JCL), scripting, coding, testing, and capacity planning.

A solution exists. A wide variety of tools are available on Unix/Linux that make this easy to do and they’re all free. Some organizations are even compelled to completely abandon z/OS and convert to an open systems platform, choosing instead to confront a whole new set of problems.

So why not combine the best of both worlds? In this article, we describe how to use Linux as a gateway for exchanging files over the Internet with your business partners, while retaining z/OS operational control of the processes and data. We show how Linux and free or open source tools can effectively be used to extend proven z/OS technology.

The hardware and software requirements are surprisingly minimal. Here’s what you’ll need:

• Hardware: a 512MB/10G Intel PC or Linux on System z guest or Logical Partition (LPAR)

• z/OS software:

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