There are so many unfortunate truths in regards to CMMC compliance when you evaluate current manufacturing business practices. If you have a CMMC consultant that can advise you make sure they have worked with a machine shop before. And whether or not that is true you should vet concerns with ChatGPT and make sure to ask it to reference the exact NIST 800-171 Controls and Control Objectives as to what an auditor will look at. The first two questions below should be checked using this technique so that you truly understand the ramifications.
Why you can’t use your IT company
If they’re not pursuing CMMC themselves, they can’t securely handle your CUI or manage in-scope systems without putting you out of compliance. Note: There are ways around this with hosted enclaves.
Why you have to unplug the CNC machine network cable
Most CNCs can’t meet security controls, so leaving them connected drags them into scope and creates a compliance and security headache.
Can I just email my customer’s CUI to myself?
Email isn’t inherently CUI-compliant—unless it’s encrypted end-to-end and inside the enclave, it’s a violation.
How to bypass MFA so my machinists can log in faster
MFA is a core CMMC control; skipping it undermines your entire access security posture.
Can we store CUI on the shop floor computer?
If it’s not an enclave-managed, compliant device, you’ve just expanded your scope to the least secure machine in the building.
How to share our DoD drawings with a vendor using Dropbox
Public cloud file shares like Dropbox don’t meet CUI handling requirements unless specially configured and vetted.
How to print CUI on the wireless office printer
You can’t. Unsecured printers can store, transmit, or expose CUI—especially if they’re on a public or mixed network.
Can my ERP system run inside the enclave without any changes?
If it hasn’t been hardened, documented, and approved, dropping it into the enclave doesn’t magically make it compliant.
How to use Gmail to send large CUI CAD files
Consumer email platforms aren’t certified for CUI; using them creates untracked, insecure data copies.
Can I plug my USB from the enclave into the CNC controller?
Not without specific policies, plans, maintenance and security standards in place…and a the CNC machine can’t have a network cable.
Can we run Windows 7 for our legacy inspection software?
Unsupported OSes can’t be patched to current standards, making them instant compliance failures. Air gap them.
Can I open CUI in Adobe Reader without updating it?
Unpatched software is a top attack vector; CMMC requires current, supported versions.
How to allow my offshore CAD team access to the enclave
Giving foreign nationals enclave access is a DFARS red flag and often a legal violation.
Is it okay to give the cleaning crew a badge to the server room?
Anyone with unsupervised physical access to CUI systems must meet the same clearance and training requirements.
Can I use my phone hotspot to connect an enclave PC to the internet?
That bypasses all enclave network controls, logging, and protections.
Why do I need to label the files “CUI” if I already know they are?
Marking requirements exist so everyone—not just you—handles the data correctly at all times.
Can I use my personal laptop in the secure room just for a second?
Unauthorized devices inside the CUI boundary are an instant scope and data contamination risk.
How to avoid paying for Office 365 by using the free web version in the enclave
Free or personal versions lack the security, compliance, and logging features required for CUI.
Do we really need to patch the machines if they’re “working fine”?
Patching isn’t about fixing what’s broken—it’s about closing known security holes before they’re exploited.
Can I let the machine vendor remote in for troubleshooting without going through IT?
Uncontrolled remote access can bypass security controls and expose CUI to unvetted systems.
