NERC CIP-015 Internal Network Security Monitoring Review
Use this NERC CIP-015 internal network security monitoring review template to document sensor coverage, alert handling, retention controls, and corrective actions for BES Cyber Systems. It helps you prove what was reviewed, what was found, and what needs follow-up.
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Overview
This template is a structured inspection record for reviewing internal network security monitoring on high and medium impact BES Cyber Systems. It is built to capture the full review trail: scope confirmation, monitoring coverage, data collection quality, alert review, anomalous activity disposition, retention and access controls, and corrective action assignment.
Use it when you need to prove that internal monitoring sources are deployed on the required segments, that data is being collected at the expected interval, and that alerts or unusual internal communications were actually reviewed for the period in scope. It is also useful when you need to document time synchronization, data-feed completeness, and whether records are retained in a secure, access-controlled location with retrievable backups or archives.
Do not use it as a generic cybersecurity checklist for every environment. It is specific to CIP-015-style internal network monitoring reviews and should be tied to the applicable procedure or SOP, the asset scope, and the reviewer’s qualification. If you are only validating firewall rules, vulnerability scans, or incident response actions, a different template is a better fit. This template is strongest when the goal is to inspect evidence, identify deficiencies, and assign follow-up actions for monitoring controls that support compliance and operational visibility.
Standards & compliance context
- This template supports NERC CIP-015 internal network security monitoring expectations by documenting coverage, review activity, and follow-up for applicable BES Cyber Systems.
- The retention and access-control checks align with common NERC CIP audit expectations for evidence integrity, traceability, and controlled access to compliance records.
- If your organization maps controls to ISO 9001:2015 or similar audit programs, the template provides a defensible record of review scope, findings, and corrective action ownership.
- Where monitoring data supports incident detection or response, the review should also align with internal cybersecurity governance and evidence-handling procedures.
General regulatory context for orientation only — verify current requirements with counsel or the relevant agency before relying on this template for compliance.
What's inside this template
Inspection Scope and Review Details
This section matters because it defines exactly what was reviewed, under what procedure, and by whom, which is the foundation for a defensible compliance record.
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Review period and asset scope documented
Record the inspection period, sites, and BES Cyber Systems included in the review.
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System impact level confirmed
Confirm the scope includes high impact and/or medium impact BES Cyber Systems.
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Applicable procedure or SOP referenced
Identify the governing monitoring, review, and escalation procedure used for this inspection.
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Inspector qualified for cybersecurity compliance review
Confirm the inspector is authorized and trained to perform the review.
Monitoring Coverage and Data Collection
This section matters because it proves the monitoring controls are actually deployed on the required segments and collecting usable data at the expected interval.
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Internal network monitoring sensors or controls deployed on required segments
Verify monitoring coverage exists on in-scope internal communication paths supporting BES Cyber Systems.
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Monitoring data is being collected continuously or at the required interval
Confirm monitoring data collection is active and aligned to the documented review cadence.
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Time synchronization verified across monitored systems
Confirm logs and monitoring sources use consistent time settings to support event correlation and review.
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Monitoring sources and data feeds are complete
Verify there are no known gaps in telemetry, log forwarding, or sensor health affecting review completeness.
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Data quality issues identified
Select any observed issues affecting monitoring data quality.
Review of Alerts and Anomalous Activity
This section matters because it shows whether suspicious internal events were reviewed, triaged, and dispositioned instead of merely logged.
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Alerts reviewed for the required period
Confirm alerts and monitoring events were reviewed for the full inspection period.
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Anomalous activity investigated and dispositioned
Verify anomalous events were investigated, documented, and closed or escalated appropriately.
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Unauthorized communication paths or unusual internal connections detected
Check for unexpected internal connections, lateral movement indicators, or policy violations.
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Alert triage timestamps captured
Record when the latest sample alert was detected and when it was reviewed.
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Observed event severity
Classify the most significant observed event during the review.
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Evidence of repeated or unresolved anomalies
Determine whether the same anomalous condition has recurred without effective remediation.
Retention, Storage, and Access Controls
This section matters because retained records must be secure, retrievable, and protected from unauthorized access to support audit and incident reconstruction needs.
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Monitoring records retained for the required retention period
Verify monitoring data, alerts, and review records are retained per the applicable retention requirement and procedure.
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Retention location is secure and access-controlled
Confirm stored monitoring records are protected from unauthorized access, alteration, or deletion.
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Backup or archive copies available
Verify backup or archive copies exist for the monitoring records reviewed.
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Records retrieval time
Enter the approximate time required to retrieve a sampled monitoring record.
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Retention or access control deficiencies observed
Select any deficiencies observed in retention, storage, or access control.
Response, Escalation, and Corrective Action
This section matters because findings only become useful when they are assigned, tracked, and closed through a clear escalation path.
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Escalation path used for significant findings
Confirm significant findings were escalated to the appropriate cybersecurity, operations, or compliance owner.
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Corrective action owner assigned
Identify the person or team responsible for remediation of any deficiency or non-conformance.
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Corrective action due date
Record the target completion date and time for remediation.
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Open findings count
Enter the number of open deficiencies or non-conformances identified during the review.
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Follow-up inspection required
Indicate whether a follow-up review is needed after corrective actions are completed.
Inspector Sign-Off
This section matters because it captures the final result, comments, and accountability for the completed review.
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Overall inspection result
Select the final result of the inspection.
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Inspector comments
Summarize key observations, deficiencies, and any compensating controls.
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Inspector signature
Inspector attestation for the completed review.
How to use this template
- 1. Enter the review period, asset scope, impact level, and referenced SOP so the inspection is tied to the exact BES Cyber Systems and control requirements being evaluated.
- 2. Confirm the monitoring sources, sensor placements, and data feeds for each in-scope segment, then record whether collection is continuous and whether time synchronization is verified.
- 3. Review the alert log and anomaly evidence for the full period, document triage timestamps, and note any unauthorized communication paths, repeated events, or unresolved dispositions.
- 4. Check retention storage, access controls, and backup or archive availability, then record retrieval time and any gaps that could affect auditability or incident reconstruction.
- 5. Assign each significant deficiency to an owner with a due date, decide whether follow-up inspection is required, and capture the overall result and inspector sign-off.
- 6. Attach or link the supporting evidence so the review can be re-performed later without relying on memory or informal notes.
Best practices
- Document the exact monitored segment, sensor name, or log source for every control you verify so coverage gaps are obvious.
- Treat time synchronization as a review item, not a background assumption, because misaligned clocks can invalidate alert correlation and event sequencing.
- Record the disposition of each significant anomaly, including whether it was benign, investigated, escalated, or left open.
- Flag repeated anomalies separately from one-off events so trend issues are not buried in a long alert list.
- Verify that retention copies are not only present but also access-controlled and recoverable within a reasonable retrieval time.
- Use objective evidence fields such as timestamps, source names, and ticket references instead of free-text conclusions alone.
- Photograph or export the relevant dashboard, log view, or case record at the time of review so the evidence matches the state you inspected.
What this template typically catches
Issues teams running this template most often surface in practice:
Common use cases
Frequently asked questions
What does this NERC CIP-015 internal network security monitoring review template cover?
It covers the review of internal network monitoring coverage, alert and anomaly handling, retention and access controls, and corrective action tracking for applicable BES Cyber Systems. The template is organized to match how a reviewer would verify scope, inspect evidence, and record deficiencies. It is meant to document the review itself, not replace your monitoring tools or incident response process.
Which assets should be included in the review scope?
Use it for high and medium impact BES Cyber Systems that fall under your internal network security monitoring program. The scope should identify the specific systems, segments, sensors, and log sources being reviewed so there is no ambiguity about coverage. If a system is outside the CIP-015 scope, document that exclusion rather than leaving it implied.
How often should this inspection be run?
Run it on the cadence required by your internal procedure and compliance program, and align the review period with the monitoring records you actually retain. Many teams use it as a periodic control check and after significant changes to network architecture, monitoring tools, or alerting logic. The key is consistency: the review period, evidence set, and sign-off should all match.
Who should complete the review?
It should be completed by a qualified reviewer who understands cybersecurity compliance requirements, the monitored environment, and the organization’s escalation path. In practice, that may be a compliance analyst, security operations lead, or control owner with the authority to validate evidence and assign corrective actions. The template includes a place to confirm reviewer qualification so the record is defensible.
How does this relate to NERC CIP and other standards?
This template is designed around NERC CIP-015 monitoring expectations for internal network security monitoring on applicable BES Cyber Systems. It also supports the broader audit discipline used in NERC CIP programs by capturing evidence, dispositions, and follow-up actions. If your organization maps controls to ISO 27001, ISO 9001-style audit records, or internal governance procedures, this template can be adapted to those workflows.
What are the most common mistakes when using this template?
Common mistakes include documenting that monitoring exists without proving the monitored segments are actually covered, or recording alerts without showing how they were triaged and closed. Another frequent issue is missing time synchronization checks, which can make event correlation unreliable. Teams also overlook retention access controls, leaving records available but not securely protected.
Can this template be customized for different monitoring tools or architectures?
Yes. You can adapt the monitoring coverage section for SIEM, IDS, EDR, NetFlow, packet capture, or other internal monitoring sources, as long as the review still proves continuous collection and complete feeds where required. You can also add fields for sensor IDs, log source names, ticket numbers, or evidence links. The structure should stay the same even if the tooling changes.
How does this template help during an audit or internal review?
It creates a single record showing what was reviewed, what evidence was checked, what anomalies were found, and what corrective actions were assigned. That makes it easier to answer auditor follow-up questions about scope, retention, and unresolved findings without reconstructing the review from scattered tickets. It also helps show that the review was not just performed, but dispositioned.
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