10.8. Hardened Virtual Server Images


10.8. Hardened Virtual Server Images
A virtual server is created from a template configuration called a virtual server image (or virtual machine image).
Hardening is the process of stripping unnecessary software from a system to limit potential vulnerabilities that can be exploited by attackers. Removing redundant programs, closing unnecessary server ports, and disabling unused services, internal root accounts, and guest access are all examples of hardening.
A hardened virtual server image is a template for virtual service instancecreation that has been subjected to a hardening process (Figure 10.13).

This generally results in a virtual server template that is significantly more secure than the original standard image.
Figure 10.13. A cloud provider applies its security policies to harden its standard virtual server images.
The hardened image template is saved in the VM images repository as part of a resource management system.
Hardened virtual server images help counter the denial of service, insufficient authorization, and overlapping trust boundaries threats.

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