Introduction
The Cisco IOS Firewall feature set provides robust, integrated firewall and intrusion-detection functionality at the perimeter of the network. The type of perimeter network can be intranets, extranets (partnernets), and Internet connectivity to remote and branch offices. The Cisco IOS Firewall provides the flexibility by providing a well-rounded solution for perimeter security. IOS Firewall is also scalable and supports Cisco IOS IP Security (IPSec) virtual private network (VPN) solutions and other software-based technologies, including Layer 2 Tunneling Protocol (L2TP) and quality of service(QoS).
CBAC is an integral part of the Cisco IOS Firewall feature set and provides unidirectional as well as bidirectional stateful filtering. ...
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