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Cisco NAC Appliance: Enforcing Host Security with Clean Access by Alok Agrawal, Chad Sullivan - CCIE No. 6493, Jerry Lin - CCIE No. 6469, Jamey Heary - CCIE No. 7680

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Introduction

Almost every contemporary corporation and organization has acquired and deployed security solutions or mechanisms to keep its networks and data secure. Hardware and software tools such as firewalls, network-based intrusion prevention systems, antivirus and antispam packages, host-based intrusion prevention solutions, and vulnerability scanners have proven effective to a certain degree, but only if they are kept up to date. For example, classic virus attacks sent via e-mail attachments, such as netsky and MyDoom, can easily be detected and prevented by any up-to-date antivirus and antispam software package. The key to stopping host attacks is being able to proactively enforce security policies that ensure all hosts must be fully patched ...

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