The NSX Microsegmentation Vault: Protecting Every Workload with Distributed Firewall Policy

This article discusses NSX microsegmentation in VMware Cloud Foundation and vDefend, emphasizing its role as a workload protection system rather than a traditional firewall. It introduces a 'vault' metaphor to illustrate how distributed firewall policy creates controlled access boundaries for each workload, using groups, identity context, and application awareness. The article covers implementation strategies, rule lifecycle management, exceptions, and validation, highlighting the need for operational discipline to maintain security. It contrasts traditional perimeter-based security with modern east-west traffic patterns, advocating for intentional, observable, and reviewable connections. The content is technical, aimed at IT professionals, and provides practical guidance for designing and operating microsegmentation policies without breaking production.