The vDefend Distributed Firewall is a comprehensive, full-stack security enforcement mechanism. It provides protection starting from Layer 2 of the OSI model (enforcing MAC address-based rules within the Ethernet policy category) all the way up through Layer 3/Layer 4 (IP addresses, TCP/UDP ports, and stateful inspection) and extending completely into Layer 7 (Deep Packet Inspection, Application Identity (App-ID), FQDN filtering, and URL analysis). This L2-L7 coverage is what enables true, context-aware micro-segmentation.
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