Infrastructure Security · IS-Q21B

Bonus Question: Are network time, logging, and synchronization mechanisms standardized across all devices and monitored for drift?

Why This Matters

Accurate time and consistent logs are critical for incident correlation and forensic accuracy. Clock drift can break event sequencing and weaken audit trails.

Maturity

0 — Unaware
No NTP configuration; logs unsynchronized.
1 — Ad Hoc
Some devices manually synced; no validation.
2 — Defined
Central NTP servers configured; manual drift checks.
3 — Managed
Automated synchronization and log timestamp validation.
4 — Integrated
NTP and log servers monitored for tampering or failures.
5 — Optimized
End-to-end log integrity validation integrated with SIEM analytics.

How to Level Up

| From → To | Actions | |—|—| | 0 → 1 |Enable NTP on all critical devices.|
| 1 → 2 |Use central, authenticated time sources.|
| 2 → 3 |Automate drift detection and alerting.|
| 3 → 4 |Integrate time and log servers with SIEM.|
| 4 → 5 |Implement log-integrity validation and tamper-proof storage. |

Enablers

Evidence

KPIs

Low-Cost / Open-Source Options (MSME)

| Purpose | Tool | Notes | |—|—|—| | NTP service | Chrony / ntpd | Authenticated sync |
| Log aggregation | Rsyslog / Fluent Bit | Centralized logging |
| Drift alerting | Prometheus exporter | Metric monitoring |

Common Pitfalls

Compliance Mapping

| Standard | Clauses / Notes | |—|—| | ISO/IEC 27001 | A.8.28 / A.8.29 | | NIST CSF 2.0 | DE.AE / GV.MA | | CERT-In 2022 | Section 17 | | NIRMATA Mapping | IS-Q21B enhances Infrastructure Security with time-sync and log-integrity assurance. |