Deny by Default

Definitions

1. A security principle where access is blocked unless it has been explicitly allowed. Deny-by-default designs reduce accidental exposure because new users, systems, or traffic paths start with no privilege until policy grants it.

   In plain English: A rule that nothing is allowed unless someone specifically permits it.

   Example: "The new platform is deny by default, so every service-to-service call needs an explicit policy."

Related Terms

• Administrative Privilege
• Allowlist
• Block Listing
• Emergency Access
• Endpoint Privilege Management
• Geofencing Security
• Least Authority
• Minimum Privilege
• Overprivileged
• Permission Abuse
• Port Security
• Principle of Least Privilege
• Privilege Management
• Proxy Security
• Restriction
• Authorization Policy