Network segmentation is a core control in Zero Trust, PCI-DSS, NIST, and FedRAMP. But segmentation silently decays — a "temporary" rule for a late-night debug, an exception that outlives its ticket, a misordered NSG priority. The diagram still looks correct, but a path is quietly open, and no one knows until an incident.
Manually auditing layered NSG rules across a real environment is slow and error-prone. Azure IP Flow Verify collapses it to one definitive answer — so segmentation can be validated continuously and automatically, catching the open path before an attacker does.