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Cisco Networks: Engineers’ Handbook of Routing, Switching, and Security with IOS, NX-OS, and ASA by Noel Rivera, Richard Bedwell, William Wilson, Chris Carthern

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CHAPTER 21

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ASA and IDS

No other network security device is as common as the firewall; however, modern firewalls have evolved leaps over the traditional plain state tracking firewalls. Modern firewalls provide options such as traffic normalization, template style policies, application inspection, IDS integration, and VPN capabilities among many other features. Of particular interest and not commonly enabled, perhaps mainly for lack of understanding are the TCP normalization and application inspections features. This chapter gleans over some of these features; however, if you wish to get a deep understanding, we suggest references,1,2 and.3

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