ASA 5500 Series Adaptive Security Appliance
Cisco Adaptive Security Appliances: ASA Firewalls.
Available in a variety of sizes, Cisco ASA 5500 and ASA 5500-X Series Firewall’s performance levels can easily fit your network and budget. Offering the same proven level of security that protects some of the largest networks at some of the most security-conscious companies in the world, there are few firewalls that do it better.