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NIST describes several approaches on how organizations can establish a demilitarized zone (DMZ). This blog will discuss the following topics around NIST SP 800-171 practice 3.13.5

Organizations handling sensitive information must define the external boundary of their system. Establishing internal boundaries helps create a multi-layer defense. Enable monitoring, control traffic and protect communications at each boundary.

NIST SP 800-171 derived three requirements from this part of FIPS 200. The Federal Acquisition Regulation derived one practice from this part of FIPS 200.

Implementing physical security controls is a critical component of safeguarding sensitive information. The NIST physical and environmental protection (PE) domain focuses on physical safeguarding practices.

Media may flow out to vendors for equipment repairs or in paper form through recycle bins. Adversaries may try to retrieve data from media after it leaves the organization. Media protection limits access to system media in both paper and digital forms.

System architecture design and separation techniques may isolate assets that handle sensitive information. Organizations may consider these separated systems external to the system handling sensitive information.

Forbes Advisor reported 68% of Americans changed passwords across accounts due to compromise. Social media and email accounts were the most common compromised passwords...

Identifying accounts and devices is foundational to creating a secure and accountable system. Accounts may have assignments to people and non-person entities...

Organizations should prevent the release of nonpublic information on systems accessible to the public. Systems accessible to the public include websites and social media...

If 3.1.1 authorizes access to the system, 3.1.2 authorizes permissions within the system. The rules of chess, for example, limit the types of functions allowed for each piece...