Cisco asa 5500 and asa 5500 x series next generation firewalls integrate the worlds most proven stateful inspection firewall with a comprehensive suite of highly integrated next generation firewall services for networks of all sizes small and midsize businesses with one or a few locations large enterprises service providers and mission critical data centers the cisco asa 5500 and asa 5500 x series next generation firewalls deliver multiscale performance with unprecedented services flexi