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SC-7(5)
Deny by Default — Allow by Exception
System and Communications Protection (SC)
Baselines
Low · Not includedModerate · IncludedHigh · Included
Description
Deny network communications traffic by default and allow network communications traffic by exception [assignment].
Discussion
Denying by default and allowing by exception applies to inbound and outbound network communications traffic. A deny-all, permit-by-exception network communications traffic policy ensures that only those system connections that are essential and approved are allowed. Deny by default, allow by exception also applies to a system that is connected to an external system.
Implementation guidance
No content available.
CSF 2.0 crosswalk
No CSF mappings exist for this control.