This white paper explains why Protective DNS (PDNS) is a required control under the Department of Defense Cybersecurity Maturity Model Certification (CMMC) and provides a practical checklist for manufacturing organizations pursuing DoD contracts. It outlines how DNS filtering directly supports the protection of Controlled Unclassified Information (CUI) under requirement SC.3.192, referencing guidance from the NSA and CISA. The checklist details core PDNS capabilities, including blocking malware and phishing domains, mitigating domain generation algorithms, leveraging AI-driven threat classification, proactively identifying newly registered malicious domains, enforcing DNS encryption via DoT or DoH, validating DNSSEC, and enabling granular policy creation by user, device, or network. It als

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