Sam Sporidis

Physical security fails more CMMC assessments than contractors expect. Use this checklist for NIST SP 800-171 PE controls,visitor logs, escort procedures, server room access, and the walkthrough evidence your C3PAO assessor will request.

Examine, Interview, and Test: the three methods C3PAO assessors use to verify CMMC compliance under NIST SP 800-171A. Learn how each method works, what evidence to prepare, and how to train your staff for a clean audit.

Compare CMMC Level 1 vs. Level 2 requirements under 32 CFR Part 170. Understand the difference between FCI and CUI, annual self-assessments vs. triennial C3PAO audits, and which level your DFARS contract triggers.

Federal Contract Information (FCI) and Controlled Unclassified Information (CUI) carry entirely different CMMC compliance obligations. Learn how to identify each, apply correct CUI markings, and determine whether your contract scope is Level 1 or Level 2.

A CUI enclave uses logical isolation and network segmentation to contain Controlled Unclassified Information within a tightly defined CMMC assessment boundary. Learn how to design an enclave that keeps corporate IT out of scope.

If your MSP processes, stores, or transmits CUI, they are an External Service Provider (ESP) under CMMC scoping guidance and enter your assessment boundary. Learn the shared responsibility evidence your C3PAO assessor will require.

Security Protection Data (SPD),SIEM logs, firewall logs, vulnerability scans, and audit records,expands your CMMC Level 2 assessment boundary. Learn how SPD is classified under NIST SP 800-171 and how to scope your monitoring tools.

NIST SP 800-171 does not name a SIEM,but it requires audit log collection, centralized review, correlation, and alerting. Learn whether your environment needs a SIEM to satisfy CMMC Level 2 controls 3.3.1 through 3.3.9.

CMMC Level 2 requires audit logs from every in-scope system,collected, centralized, retained, reviewed, and producible on demand. Learn what events to log, retention periods under NIST SP 800-171, and how to prove log review to a C3PAO.

CMMC Level 2 requires authenticated vulnerability scanning of all in-scope systems under NIST SP 800-171 control 3.11.2. Learn scan frequency requirements, how to document exceptions, patch SLAs, and the remediation evidence assessors evaluate.

NIST SP 800-171 requires 'timely' flaw remediation but the timeline is organization-defined. Learn how to set severity-based patch SLAs (critical: 72 hours, high: 7 days), document emergency patching, and produce the evidence your C3PAO expects.

NIST SP 800-171 controls 3.5.3 and 3.7.5 require multi-factor authentication for all remote access and all privileged accounts. Learn which logins need MFA, when phishing-resistant factors are required, and the common assessment gaps contractors miss.

When a C3PAO assessor evaluates a CMMC control, they need evidence from whoever implements it,MSP, MSSP, or internal team. Learn how to build a shared responsibility matrix, collect third-party evidence, and avoid the gaps that fail audits.