A Firewall is a security device or software that monitors and controls network traffic based on defined rules, permitting or blocking packets to enforce a boundary between trusted and untrusted zones. Ranging from stateful packet filters to next-generation firewalls with application awareness and intrusion prevention, it is a foundational control at data center perimeters and between internal segments.
Category: Security & Compliance · Subcategory: Cybersecurity & Zero Trust · Part of the AIDC Technical Terminology reference.