AS400 Security Guide for IBM i Buyers

Start With Evidence, Not Product Names

A serious AS400 security project should begin with evidence about the current environment: user profiles, special authorities, object authority, exit point exposure, audit journal settings, password policy, remote access paths, and current monitoring. Product demos are useful later, but they do not replace a security inventory.

Buyers who skip the evidence step often buy a narrow tool and then discover the highest-risk access path was somewhere else.

Sequence The Controls

IBM i security improvement is easier to sustain when it is phased. Start with privileged users and obvious authority sprawl, then add MFA where interactive and remote access risk is highest, then improve event visibility through SYSLOG, SIEM, or QRadar integration.

The goal is not to make every control perfect on day one. The goal is to reduce the highest-risk paths first while creating enough reporting that progress can be proven.

Do Not Leave IBM i Outside The SIEM

Many organizations centralize security monitoring but leave IBM i events out of the same workflow. That creates a visibility gap for the exact system that often runs finance, inventory, manufacturing, or order processing.

IBM i security events should be normalized and forwarded in a way the SOC can use. The destination may be QRadar, Splunk, or another SIEM, but the key requirement is useful context, not just more logs.

Make Remediation Owned Work

A security assessment is only valuable if someone owns the remediation plan. Buyers should assign owners for authority cleanup, MFA rollout, exit point controls, audit reporting, SIEM mapping, and exception policy.

Without ownership, security findings become a static report. With ownership, they become an operating workflow that can satisfy auditors, insurers, customers, and internal leadership.

Common questions about this Security topic.

What should AS400 security software protect first?

Start with privileged users, special authorities, remote access, exit points, and audit visibility. Those areas usually create the highest risk and the strongest evidence gap during audits or cyber insurance reviews.

Does IBM i security need SIEM or QRadar integration?

If the organization already uses a SIEM or SOC workflow, IBM i should not be invisible to it. SYSLOG and SIEM integration can make IBM i events part of the same monitoring and incident-response process as the rest of the environment.

Sources

• IBM developer article on connecting IBM i to SIEM systems