Does your organization still have a physical appliance for a firewall? You might be able to count the days before that black box is gone. Advancements in cloud solutions have brought a suite of security services to your fingertips, now including firewall technology. Firewall as a service, or FWaaS in cloudspeak, has emerged as a stand-alone product and a core component of comprehensive security tools like secure access service edge (SASE). We look at the history of firewalls, FWaaS as it stands now, and where top network firewall vendors are with cloud-based firewalls. Firewalls and FWaaS Firewalls have been a core component of comprehensive network security strategies for almost 30 years. As the concept has evolved, new technologies surrounding network connectivity have enhanced firewalls to meet enterprise needs. Cloud computing has now opened the door to virtually-deployed firewall solutions.