Individual skill
securing-historian-server-in-ot-environment
Audits and hardens process historian servers (OSIsoft PI, Honeywell PHD, GE Proficy, AVEVA Historian) in OT environments: Purdue-level network placement, interface access control, secure DMZ replication via data diodes or PI-to-PI connectors, SQL injection prevention, and process data integrity. Use when auditing or hardening a historian server, or designing secure OT-to-IT data replication through a DMZ.
skills/securing-historian-server-in-ot-environment/SKILL.md
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- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- ot-security Declared skill tag
- ics Declared skill tag
- scada Declared skill tag
- industrial-control Declared skill tag
- iec62443 Declared skill tag
- historian Declared skill tag
- osisoft-pi Declared skill tag
- data-integrity Declared skill tag
- data Derived category
- operations Derived category
- security Derived category
- data-databases Derived category
- security-application Derived category
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# Securing Historian Server in OT Environment
## When to Use
- When deploying a new historian server in an OT environment and configuring it securely from the start
- When hardening an existing historian after a security assessment identified it as a high-risk target
- When designing historian data replication architecture through a DMZ for IT access to process data
- When implementing access controls to prevent unauthorized modification of historical process data
- When investigating suspected historian compromise or data integrity issues
**Do not use** for IT-only database security without OT data (see general database hardening), for real-time SCADA data transmission security (see detecting-attacks-on-scada-systems), or for historian selection and sizing decisions.
## Prerequisites
