It can describe provider-native network rules, a virtual firewall appliance run by the customer, a managed firewall attached to cloud networks, or a cloud-delivered service that filters traffic for users and sites.
These forms have different enforcement points and responsibility boundaries. A provider-native control may protect virtual interfaces or subnets, a virtual appliance may inspect routed traffic, and a service may enforce policy at remote points of presence. Operators must understand state tracking, rule evaluation, route symmetry, scaling, tenancy, logging, and failure behavior for the chosen design.
Key points
Policy coverageMap ingress, egress, workload-to-workload, hybrid, management, and service-provider paths, then confirm which component governs each flow.
Cloud integrationProtect administrative APIs and automation, restrict policy changes, monitor configuration drift, and account for ephemeral addresses and rapidly changing workloads.
Shared responsibilityDocument what the cloud or security provider operates and what the customer must configure, monitor, test, and investigate.
Important limitationThe cloud label does not guarantee elastic capacity, deep inspection, consistent multi-cloud policy, or secure configuration. A firewall also cannot correct excessive identity permissions, insecure application logic, or a path that bypasses it.