NET-04.1 ยท Deny Traffic by Default & Allow Traffic by Exception

Control Description

Mechanisms exist to configure firewall and router configurations to deny network traffic by default and allow network traffic by exception (e.g., deny all, permit by exception).

Control Question
Assessment question for control validation

Does the organization configure firewall and router configurations to deny network traffic by default and allow network traffic by exception (e.g., deny all, permit by exception)?

Control Weighting
10
Validation Cadence
Annual
NIST CSF Function
Protect
Supply Chain Risk Management (SCRM) Tiers
Applicable SCRM tier levels for this control
Tier 2 - Operational
Tier 3 - Tactical
Core Control Designations
Special designations and baseline inclusions
MAD: NET-04.1
ESP Level 2: NET-04.1
ESP Level 3: NET-04.1