The Cisco Catalyst Firewall Security System is ideal for perimeter and campus deployments where security policies or network architectures require the use of a separate dedicated security appliance. The Cisco Catalyst Firewall Security System not only offers exceptional firewall performance, but also provides extensive flexibility and modularity that is unprecedented in typical firewall appliances. The Cisco Catalyst Firewall Security System takes advantage of the robust security and network services integral to Cisco Catalyst systems - line-rate Layer 2-4 access control list (ACL) processing; protocol and Media Access Control (MAC) filtering; authentication, authorization, and accounting (AAA) support; Open Shortest Path First (OSPF); switching and routing infrastructure; and access to the broadest array of high-density LAN and WAN modules for site-specific customization.For environments requiring extensive site customization or additional security services, the Cisco Catalyst 6506 Firewall Security System integrates the Cisco Catalyst 6000 Supervisor 2 and Cisco Catalyst Firewall Service Module preinstalled, with an additional four slots for local customization (six slots total). This is an excellent choice where additional physical ports are required, the integration of additional security services is warranted (such as intrusion detection), or higher firewall throughput is desired. For example, up to three additional Firewall Service modules may be inserted, achieving up to 20 Gbps of aggregate firewall throughput - meeting the needs of the most demanding security environments.