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FWaaS works by routing egress network traffic through a cloud firewall service, where security policies are applied, and inspection happens before traffic reaches websites, apps, or cloud services. Instead of deploying and managing firewall appliances at every location, organizations send traffic to a cloud-based enforcement point near the user or branch office and manage policy centrally.
- Traffic is routed to the cloud firewall service
Users and branches send traffic to the firewall in the cloud (often via clients or tunnels). - Apply policies first
The service applies firewall rule sets, such as allowed IP addresses/ports/protocols, application layer controls, user/group rules, and FQDN destination rules. - Inspection runs on the network traffic
The cloud firewall service inspects network egress traffic using capabilities such as 5-tuple firewall rules, intrusion prevention (IPS), DNS security checks, and domain-based DNS URL filtering. - A decision is made to allow, block, alert, or log an event
Based on policy and firewall inspection results, network egress traffic is allowed or blocked. Users can also be sent alerts and events can be logged for review and auditing. - A central console manages FWaaS policy globally
Admins create and update firewall policies once, then enforce them consistently across users, locations, and cloud environments.
- Logs feed monitoring and investigation workflows
Traffic logs typically flow into monitoring tools and, where used, SIEM/SOAR platforms to support detection, investigation, and compliance needs.
FWaaS is a policy enforcement network egress checkpoint in the cloud that sits between users or branch offices and the desired destination of the internet or cloud resources.
