Audits, Logging, and Reporting
Log management
Logs provide the accountability half of access control. To be useful they must be complete, time-synchronized (NTP), protected from tampering, retained per policy, and actually reviewed. Centralizing logs in a SIEM enables correlation across systems and alerting on patterns no single log would show.
- Protect logs with write-once storage or a separate log server; administrators should not be able to edit their own audit trail.
- Clipping levels set a threshold before an alert fires, reducing noise from routine errors.
- Key control indicators and metrics turn raw events into something management can act on.
Audits and third-party assurance
- Internal audits are cheap and frequent but less independent.
- External and third-party audits provide independence and are often required by regulation.
- SOC 1 covers financial reporting controls; SOC 2 covers security, availability, processing integrity, confidentiality, and privacy; SOC 3 is a public summary.
- Type I reports assess design at a point in time; Type II assesses operating effectiveness over a period.
Report to the audience
Technical findings go to engineers; senior management needs business risk, trend, and cost of remediation. A finding that management cannot act on has not been reported effectively.