OT Network Security Monitoring

Explore detection across physical, IT, and OT layers and their attack surfaces and detection tools. Focus on the human-in-the-loop approach and OT-specific deep packet inspection to prevent threats.

Explore the Purdue enterprise reference architecture, from level 0 sensors to level 5 enterprise IT, and see how IT-OT separation and a level 4 dmz protect critical industrial systems.

Learn span port monitoring, a port mirroring technique that copies production traffic to an IDS or network sniffer, enabling passive OT security without disrupting operations.

Compare SPAN and NetworkTap for traffic capture in OT networks, detailing reliability, error visibility, resource impact on switches, and deployment requirements.

Monitor OT networks remotely using ERSPAN for encapsulated traffic from PLCs, HMIs, and sensors, sent over GRE and IP headers to a centralized security operation center for analysis.

Explore inline monitoring mode and how it actively blocks malicious traffic, while explaining why OT environments favor passive visibility due to availability, latency, and legacy protocols, with careful DPLA protection.

Explore modern OT security tools that protect industrial environments, including Dragoz, Clarity, Nozomi, and Armis, offering asset discovery, real-time monitoring, anomaly detection, and agentless threat detection for industrial control systems.

Explore how asset visibility in OT networks reveals thousands of devices—automatically grouped into 89 categories without agents or downtime—enabling policy enforcement, detection, and incident response.

Map a single device's complete asset profile, including vendor, OS, serial, MAC, and IP, then assess risk and location to guide safe, non-disruptive actions without touching the device.

The Armis dashboard delivers a single, actionable view of your OT environment, instantly showing asset counts, network health, and segment status across corporate, ICS, and medical networks, with agentless discovery.

Explore pcap analysis for threat hunting in OT cybersecurity by capturing raw network traffic and identifying suspicious communications, unauthorized devices, and protocol behavior such as DNP3, ModeBall, and Ethernet IP.

Analyze pcap files in Wireshark to reveal protocol usage, top communicating systems, and key traffic patterns; apply filters to study mode bus, DNS, and HTTP activity in OT environments.

Explore how a SIEM aggregates logs and alerts from firewalls, endpoint security, Active Directory, and OT sensors to provide centralized visibility, correlate events, and enable faster incident detection and response.

Siem enables real-time threat detection by monitoring logs from firewalls, servers, endpoints, and OT sensors; centralizes log management; speeds incident response; supports compliance reporting; reduces security noise.

Understand how OT vulnerability management protects physical processes and safety, using ICS-specific sources and tools like ARMYs and Clarity. Then navigate patching, risk scoring, compensating controls, and end-of-life issues.

Explore the RMAs vulnerability dashboard, showing 12.3k total vulnerabilities across assets, including personal devices, with high-risk findings like Log4j and actionable patching insights.

Explore sources of OT cyber threat intelligence, including ICS-CERT/CISA's ICS-Search, the National Vulnerability Database, and vendor advisories, and learn to correlate multiple sources for active vulnerability management.

Compensating control helps manage vulnerabilities in OT by reducing attack surface through network segmentation and micro-segmentation, virtual patching, risk registers with vulnerability restore, enhanced monitoring, application control, and planned decommissioning.