CIS Control 13.3: Deploy a Network Intrusion Detection Solution
Network intrusion detection is your frontline defense against active threats targeting your enterprise assets. CIS Control 13.3 requires deploying a NIDS or equivalent cloud service to continuously monitor and alert on suspicious network activity. For SMBs managing limited security budgets, this control bridges detection and response capabilities across your infrastructure.
What this means
CIS Control 13.3 mandates the deployment of a Network Intrusion Detection System (NIDS) or equivalent managed detection service across enterprise assets. This control ensures your organization actively monitors network traffic for signs of compromise, malicious activity, or policy violations in real-time. Depending on your infrastructure, this may include traditional on-premise NIDS appliances, cloud-native detection services from your CSP, or hybrid monitoring solutions that cover both.
How to comply
- 1.Assess your network architecture and identify critical assets and network segments requiring intrusion detection coverage
- 2.Select a NIDS solution or CSP-managed detection service aligned with your infrastructure (on-premise, cloud, or hybrid)
- 3.Deploy the intrusion detection solution with proper sensor placement at network boundaries and critical chokepoints
- 4.Configure detection rules and signatures appropriate to your industry, threat landscape, and asset criticality
- 5.Establish alert thresholds and integrate alerting with your security monitoring team or SIEM
- 6.Conduct testing to validate detection capabilities across common attack scenarios
- 7.Document your NIDS configuration, rule sets, and monitoring procedures
- 8.Review and tune detection rules quarterly to reduce false positives and improve detection accuracy
Evidence auditors look for
- NIDS deployment documentation showing sensor locations and network segments covered
- Configuration records for detection rules, signatures, and alert thresholds
- CSP service enablement confirmation if using managed detection services
- Alert logs demonstrating active monitoring over a 30-day period
- Testing reports validating detection of known attack patterns
- Incident response logs showing NIDS alerts that triggered investigations
- Rule tuning records showing quarterly reviews and adjustments
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
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