Every industry with a control network has a line to hold.
Wherever a business network meets the systems that run a process, a few firewall rules decide what can cross. Pick an industry to see where that line usually sits, one crossing that should not be there, and the rules it answers to.
- ManufacturingStop one bad laptop from stopping the line.
- Water and wastewaterKeep the treatment plant off the office network.
- Oil and gasKeep the pipeline running when IT has a bad day.
- Electric powerSee every firewall rule into the Electronic Security Perimeter.
- Pharmaceuticals and life sciencesProtect the batch, not just the network.
- Defense manufacturingShow the shop floor is scoped, not forgotten.
- Ports and maritimeGet terminal segmentation ready before the Coast Guard asks.
- Rail and transitKeep passenger systems away from signaling.
- Warehousing and logisticsKeep the dock moving when the office network goes down.
Warehousing and logistics
Automated distribution centers run conveyors, sorters, storage and retrieval systems and cold storage on controllers the warehouse management system drives every minute. SegAudit shows which rules let the business network and outside support reach that floor, and the change that keeps orders moving.
What crosses the line in warehousing and logistics
Each one is a finding ranked by risk, with the rule that allows it, the hosts that used it when a traffic log is loaded, and the change that closes it.
- The WMS talking straight to PLCs
Pick orders go from the warehouse management system to conveyor controllers directly instead of passing down through warehouse control and the sorter's own supervisory systems.
- Integrator access that never closes
A remote support rule for the automation integrator stays open to the sortation network on any service.
- Scanners and office hosts in one zone
Handheld scanners, mobile robots and office laptops share one network, so a problem in the office can reach the floor.
- Cold storage open to the business network
Refrigeration controllers accept traffic from the whole business network instead of the hosts that monitor them.
Illustrative examples of what an audit can find. They are not from a customer.
The rules warehousing and logistics answers to
SegAudit judges the controls a firewall's evidence can speak to as supported, partial or gap, and shows each one again after the change. It helps you assess segmentation; it does not certify compliance.
| Rule | What it asks of segmentation | Judged from the evidence |
|---|---|---|
| IEC 62443-3-3 | Zones and conduits: network segmentation (SR 5.1), zone boundary protection (SR 5.2) and least functionality. | 9 controls |
| NIST CSF 2.0 | Networks protected from unauthorized logical access (PR.IR-01), asset inventories and log monitoring. | 10 controls |
| ISO/IEC 27001:2022 Annex A | Segregation of networks (A.8.22), networks security (A.8.20) and logging. | 7 controls |
| NIS2 Article 21(2) | Cybersecurity risk-management measures for essential and important entities in the EU. | 6 controls |
Control by control in the frameworks overview. Confirm the versions in force for your audit period.
Who runs the audit
The same audit either way. What differs is who approves the change.
Asset owners
Your own firewall team runs the audit on its own sites, every quarter, and approves each change through its own change process. Priced per site with the Asset Owner edition.
For asset ownersConsultants
You assess a client's sites and deliver the findings and the fix under your firm's letterhead. The client's team approves. Professional or Engagement.
For consultantsSee what crosses the line on your own firewalls.
Export a firewall configuration, add a traffic log if you have one, and read the findings on your own workstation. Nothing leaves it, and SegAudit never connects to your network.
Step-by-step export guides, for customers and trial holders: Palo Alto, FortiGate, Cisco ASA, Cisco FTD, Check Point.