Earlier this month IBM Systems Magazine published an article by Joel Tilton
Note you can also navigate from there to Joel's earlier article on achieving PCI compliance for FTP.
You might also be interested in the Redbook
Products discussed include IBM InfoSphere Guardium, IBM Security zSecure, IBM Security QRadar, IBM Security Key Lifecycle Manager, IBM Security Identity Manager, IBM Security Access Manager, and others.
Linux on System z employs some unique technologies that can potentially make delivering overall network security easier by providing centralized management capabilities and reducing the number of control checks -- device coupling controls, auditing and troubleshooting functions, and predefined network configurations (such as the HiperSockets adapters, technology that enables high-speed communications between partitions on a server with a hypervisor).
The IBM Redbooks tech note "Security for Linux on System z: Securing Your Network" offers a rather detailed abstract that explains these tools and how they work in order to set up a secure network, focusing on the task of configuring virtual switches to automatically manage which users can couple with them. An excellent read of a few minutes that can bring you a wealth of knowledge on secure networking.
To expand your Linux on System z security experience even further, you can tackle the complete Redbook publication this note was abstracted from: Security for Linux on System z. If you need more basic hands-on experience using Linux on System z (and cloud), take a look at the video IBM Linux on System z Cloud Test Drive to better understand virtualization, deployment, and image management from both a user and an administrator point of view.
From IBM Redbooks, Using the IBM Security Framework and IBM Security Blueprint to Realize Business-Driven Security can help organizations effectively visualize security issues by creating a bridge to address the communication gap between the business and technical perspectives of security. By using the IBM Security Framework to characterize the business viewpoint and the IBM Security Blueprint to describe the technology landscape, your organization connects with a lingua franca that puts both sets of concerns on the same page. Please visit the site for multiple download and discussion options
In the video, IBM Security Strategy Director Ravi Srinivasan explains why IBM combined these two topics in this Redbook. 3:59