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Security / IBM i (OS/400, i5/OS)

While auditing every possible action and object access is great from a security perspective, reality says that's not going to happen. Carol discusses how to lessen the impact of auditing on your system.

By Carol Woodbury

Don't get me wrong. Speaking from a security professional's perspective, the more you audit, the better. Information in the audit journal is invaluable when performing forensics and extremely helpful to the system and security administrators to debug daily issues. But here's where the ideal must meet the practical. The fact of the matter is, the storage capacity on most systems doesn't allow you to turn on every auditing feature and log every object access. So what do you do when you find that your system is filling up with audit journal receivers? This article discusses some options.

Read more ...

It's a well-known fact that many auditors aren't knowledgeable about IBM i. But they're learning! Here are several IBM i configuration settings that you'd better hope your auditor never fully understands.

By Carol Woodbury

Because auditors aren't usually IBM i-savvy, administrators will often choose a configuration or provide an answer that, if fully understood by their auditor, would never be allowed. Here are some of the things that fall into that category. And yes, I'm hoping that your auditor reads this article!

Read more ...

Everyone's aware of the dangers of *ALLOBJ, *SECADM, and *SPLCTL special authorities. But what about the rest? This article discusses the issues you should be aware of when assigning the other special authorities.

By Carol Woodbury

When discussing the concept of "least privilege access" that is, giving users only the authorities necessary to do their jobs it's obvious that only trusted users should be granted *ALLOBJ special authority. It's also obvious that *SECADM, which allows users to create user profiles and modify them when they have *USE authority to the profile, should be given only to the people who need to maintain user profiles. Since *SPLCTL is the *ALLOBJ of spooled files, obviously you only grant that special authority to users who are allowed to see all spooled files on the system. But who should be assigned the rest of the special authorities, and what vulnerabilities might you be causing when assigning these special authorities? Let's take a look.

Read more ...

Sometimes you run across a user profile and you see that it's being used, but you have no idea of its purpose. This article discusses how to discover a profile's use.

By Carol Woodbury

When helping clients remove profiles from their systems or reduce authorities assigned to profiles, I often face a situation in which the current administrator is uncertain whether a profile is being used and, if it is, what it's used for. The first time I was faced with the dilemma of determining a profile's use, I thought it would be easy. Simply enable object auditing of *ALL on the profile and see when it's being used, right? Wrong. Not all operations on all object types are audited. When I checked Appendix E of the IBM i Security Reference manual, I realized that the use of a user profile is not audited via object auditing.

Read more ...

The Wall Street Journal stated that, as part of the Equifax breach, database queries were performed “that provided access to documents and sensitive information stored in databases in an Equifax legacy environment.” Many organizations have dubbed their IBM i as “legacy.”

By Carol Woodbury

We don’t yet know the details of the Equifax breach. But just for fun, let’s assume for the moment that their legacy system was indeed an IBM i. What could Equifax have done to protect themselves?

Read more ...

What can organizations do when using “best practices” settings cause something to break? This article discusses your options.

By Carol Woodbury

Of course, implementing what is recommended as a “best practice” is what you should strive to do. However, I’ve found that there are instances when implementing a best practice setting in its most literal sense will cause issues. What should you do? Ignore that aspect of security and move on? No. You’ll want to find an alternative solution that meets the spirit of the best practice recommendation but fulfills it differently. In the security and audit world, that’s called a “compensating control.” Let’s look at some examples.

Read more ...

With so much fake news floating around, I thought I’d take the time to debunk the fake news I hear about IBM i security.

By Carol Woodbury

When I visit new clients, I often find that they have been misguided somewhere along the way and/or are making assumptions about features of IBM i security that were once true but aren’t any longer. This article goes through some of the more common misconceptions I hear.

Read more ...

With so much information in the IBM i audit journal, you have to know what you’re looking for. Otherwise, you may miss some important information.

By Carol Woodbury

Whether you’re using a product such as HelpSystems’ Compliance Monitor or getting information directly out of the audit journal yourself, this article will help you have a better understanding of what’s available.

Read more ...
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