Reducing Alert Fatigue in Industrial Networks

Read full article here: https://corsha.com/blog/how-to-reduce-alert-fatigue-in-industrial-networks-without-losing-visibility/?source=nhimg

In modern industrial operations, network detection and response tools are essential for spotting threats, but too many unfiltered alerts can overwhelm security teams. This “alert fatigue” not only slows incident response but also increases the risk of missing genuine threats. According to CISA’s ICS guidance and NIST SP 800-82, excessive, contextless alerts can harm operational uptime, efficiency, and team morale.

To address this, organizations must shift from volume-based monitoring to context-driven, identity-aware security that ensures every alert is actionable.

Five Key Steps to Reduce Alert Fatigue Without Losing Critical Visibility

1. Tie Alerts to Verified Identity & Session Context

   • Move beyond IP-based alerts by correlating activity to a specific, verified machine, user, or vendor.

   • This context makes it easier to separate trusted, managed connections from potential threats, reducing wasted investigation time.

2. Segment Connections to Limit Lateral Movement

   • Use microsegmentation to confine access by zone, system, and session.

   • Reducing the scope of each connection decreases both attack surface and unnecessary alert cascades.

3. Prioritize Alerts Based on Policy, Purpose, and Role

   • Align alert thresholds with known schedules, job roles, and approved behaviors.

   • Suppress routine activity while surfacing high-risk anomalies.

4. Eliminate Blind Spots in Vendor & Remote Access

   • Require authentication, authorization, and monitoring for every external session.

   • Reduce noise from unmanaged VPNs, shared credentials, and shadow tools.

5. Automate Connection Lifecycles & Auditing

   • Enforce automatic session expiration, credential rotation, and token revocation.

   • Maintain detailed connection logs to improve post-incident analysis and compliance.

Corsha’s Identity-First Approach

Corsha’s Identity Platform for Machines applies these principles directly, delivering dynamic machine identity, session context, and fine-grained access control. By integrating with existing OT/ICS monitoring tools, Corsha ensures:

• Every connection is tied to a verified, trusted identity.

• Alerts focus on policy-relevant events rather than routine noise.

• Teams can respond faster, with greater clarity and confidence.

Bottom Line

Reducing alert fatigue in industrial networks isn’t about turning off alerts, it’s about making them meaningful. With identity-aware access, segmentation, and automation, manufacturers can protect uptime, improve security, and focus on what truly matters.