Busting CMMC Myths:
Why Network Segmentation and IIoT Isolation Are Critical for Cybersecurity Resiliency
Brought to you by Manufacturing Works and CyberWyoming
As the Department of Defense (DoD) continues rolling out the Cybersecurity Maturity Model Certification (CMMC), many small and mid-sized businesses remain uncertain about what compliance truly entails. Misunderstandings are common—but one truth is universal: cybersecurity isn’t optional. It’s not just an IT concern; it’s about safeguarding every internet-connected device in your environment, from smart sensors to smartphones.
“Isolation isn’t just for manufacturers. Small businesses need to think about separating those devices that don’t have antivirus loaded on them like their wireless-connected security cameras, smart TVs, and cell phones,”
— Laura Baker, Executive Director, CyberWyoming
Myth #1: “CMMC Doesn’t Apply to Us”
A common and risky misconception is that CMMC is only relevant to large prime contractors. In truth, any business within the DoD supply chain that handles Controlled Unclassified Information (CUI)—even indirectly—must comply.
This includes:
- Machine shops
- Subcontracted welders
- Parts suppliers
- IT service providers
Myth #2: “Cybersecurity Is Just for the IT Team”
CMMC promotes a comprehensive cybersecurity culture. It’s not just about email servers or administrative computers—production environments matter, too. If your CNC machines or IIoT sensors share a network with your cloud apps or business systems, you’re potentially creating a direct bridge for cybercriminals from phishing emails to machine shutdowns.
Network Segmentation: Digital Walls That Defend
Network segmentation divides your infrastructure into smaller, more secure segments—limiting attacker mobility.
Key benefits include:
- Shrinking the blast radius of intrusions
- Boosting visibility into network activity
- Enabling granular security controls
- Supporting CMMC Level 2 and 3 compliance
Why You Must Isolate IIoT and Smart Devices
IIoT and smart technologies—like PLCs, sensors, and smart TVs—typically lack encryption and antivirus protection. Placing them on the same network as sensitive business data dramatically increases risk.
“Smart TVs and IP cameras don’t run antivirus or have regular patch schedules, but they’re often on the same Wi-Fi as your finance systems,”
— Laura Baker, CyberWyoming
“Without segmentation, one compromised device could bring down your entire operation.”
Even consumer-facing companies should adopt zero-trust principles, requiring every device to validate its access rights before touching critical systems.
Action Steps for Cyber Resilience
To protect your systems and comply with CMMC, start here:
- Create dedicated VLANs for IIoT and operational technology (OT).
- Deploy firewalls and access control lists (ACLs).
- Enable MAC address filtering and identity-based authentication.
- Use jump boxes or proxies between business and machine networks.
The Road to Compliance Is the Road to Resilience
CMMC is more than a checklist—it’s a blueprint for business continuity. Segmentation and isolation aren’t just for large manufacturers—they are cost-effective, scalable defenses for every Wyoming business.
Need help getting started?
Manufacturing Works and CyberWyoming offer coordinated support to help your organization assess risk, understand CMMC requirements, and take concrete steps toward cybersecurity compliance. CyberWyoming can guide you through cyber hygiene best practices, help implement network segmentation, and connect you with trusted tools and resources tailored for Wyoming’s small business and manufacturing communities.
