Virtual Machine NAP Support
Windows Server virtualization can work together with the Network Access Protection (NAP) feature in Windows Server 2008 to prevent unhealthy virtual machines from accessing and compromising an organization’s network. NAP is used to configure and enforce computer health requirements and to update, or remediate, noncompliant computers before they can connect to the corporate network. With NAP, administrators can configure health policies that define such things as software requirements, security update requirements, and required configuration settings for computers that connect to the organization’s network.
NAP enforces health requirements by assessing the health of client computers, and limiting network access when computers are noncompliant. Both client and server-side components assist in the remediation of noncompliant computers, so that they can obtain unlimited network access. If a computer is determined to be noncompliant, it can be denied access to the network, or patched immediately to bring it into compliance.
NAP enforcement methods support four network access technologies that work in conjunction with NAP to enforce health policies: Internet Protocol security (IPSec) enforcement, 802.1X enforcement, virtual private network (VPN) enforcement for Routing and Remote Access, and Dynamic Host Configuration Protocol (DHCP) enforcement.
The benefits of NAP apply to virtual machines in the same way that they apply to physical computers in the environment (more comprehensive coverage of NAP is located in chapter 5, Security and Policy Enforcement).
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