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sica-fondt/knowledge/cyber-skills/skills/securing-historian-server-in-ot-environment/references/api-reference.md
Claude 24f816b6a3
Consolidate 22 sibling repos into layered organism structure 
Place useful parts of the surrounding repos into sica-fondt by layer, per the
body model (Ada = membrane; brain/endocrine/capabilities/knowledge non-Ada):

- brain/        LLM reasoning + providers (dapr, hermes, MoMoA)
- capabilities/ REPRAG sidecars: hermes tools/skills, dapr tools, parallel
                dispatch, A51 channels, and the OSINT cluster
- knowledge/    LORAG corpus: 754 cyber-skills, agency personas, secure-coding,
                MITRE ATT&CK data
- reference/    defensive threat-reference (C3, shhbruh doc) + AdaYaml parser

License handling: AGPL sources (worldosint, advanced_evolution, mercury,
Reticulum) and GPL DeTTECT are SPEC-only clean-room/port descriptions — no
copyleft code copied. MIT/Apache/data parts copied as working trees.

Safety: shhbruh escape/persistence material and C3 covert-C2 kept as reference
only, not wired into the running organism. See CONSOLIDATION.md.

https://claude.ai/code/session_01UehUqEXXJJCsHoA4voCU5c
2026-06-10 06:53:01 +00:00

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API Reference: Securing Historian Server in OT Environment

Common Historian Ports

Port Service Risk if Exposed
5450 PI Data Archive SDK/API data access
5457 PI AF Server Asset Framework access
443 HTTPS Web API (acceptable if TLS)
80 HTTP Cleartext credentials/data
1433 MS SQL Direct database queries
3389 RDP Remote admin access
135/445 RPC/SMB Lateral movement target
502 Modbus Industrial protocol

Purdue Model Placement

Level Systems Historian Role
0-1 Field devices, PLCs Data source
2 HMI, SCADA Data source
3 Site Operations OT Historian location
3.5 DMZ Replica historian
4-5 Enterprise Consumer of DMZ data

Authentication Methods

Method Security Level Recommendation
PI Trust (IP-based) Insecure Migrate immediately
piadmin default Insecure Disable account
Windows Integrated Recommended Use AD groups/PI Mappings
Certificate-based Strong For inter-server comms

Python Libraries

Library Version Purpose
socket stdlib Port scanning
json stdlib Report generation
pathlib stdlib File handling

References

  • OSIsoft PI Security Guide: https://docs.aveva.com/
  • IEC 62443: Industrial Automation Security
  • NIST SP 800-82: Guide to ICS Security