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http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a00804357b1.html
http://www.cisco.com/en/US/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00803a9a24.html
http://www.cisco.com/en/US/products/hw/switches/ps5528/products_configuration_guide_chapter09186a00803a9a23.html
http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a0080435872.html
http://www.cisco.com/en/US/products/ps6642/products_white_paper0900aecd804fa16a.shtml
Chapter 5. Cisco IOS Firewall
Security is no longer a straightforward product or technology enabler, but a core system in a network design.
The innovative flagship Cisco IOS Software provides an array of security solutions including the flagship IOS
Firewall feature set. This set provides integrated firewall and intrusion detection technology for the Cisco IOS
Software. The Cisco IOS Firewall feature is a stateful-inspection software component of Cisco IOS Software.
The Cisco IOS Firewall feature set provides a single point of protection at the network perimeter, making
security policy enforcement an inherent component of the network.
Cisco IOS Firewall consists of several major subsystems: an advanced firewall engine for stateful-packet
inspection (SPI), Context-Based Access Control (CBAC), Zone-Based Policy Firewall (ZFW), Intrusion Prevention
Systems (IPS), Authentication Proxy, Port-to-Application Mapping (PAM), Multi-VRF firewall, Transparent
firewall, and several others.
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