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![]() ![]() Therefore, if possible, the host should be even more secure than the VMs it controls. ![]() ![]() A compromise to the hosting computer probably means a compromise to any guest operating systems. One last comment: A VM should be as secure as possible, but, in general, because the hosting computer is in a controlling position, it is likely more easily exploited. Keep an eye out for network shares and other connections between the virtual machine and the physical machine or connections between two VMs.Ĭonsider disabling any unnecessary hardware from within the virtual machine, such as optical drives, USB ports, and so on. This includes considerations for the virtual machine OS as well as the controlling virtual machine software. However, there are several things to watch out for that, if not addressed, could cause all your work compartmentalizing operating systems to go down the drain. The VM should have the latest updates, the newest AV definitions, perhaps a personal firewall, strong passwords, and so on. In general, the security of a virtual machine operating system is the equivalent to that of a physical machine OS. Keep in mind that the motherboard BIOS/UEFI and the CPU should have virtualization support.įor more information on how to create virtual machines with programs such as Hyper-V and VirtualBox, visit and. So in essence, the guts-the core of the system-need to be robust. This means a powerful, compatible motherboard as well. AMD chipsets use the AMD-Vi extension.Īny computer designed to run a hypervisor often has a powerful CPU (or multiple CPUs) with four cores or more and as much RAM as can fit in the system. AMD CPUs that support x86 virtualization use the AMD-V extension. Intel chipsets use the VT-d and VT-c extensions for input-output memory management and network virtualization, respectively. Intel CPUs that support x86 virtualization use the VT-x virtualization extension. To check whether your CPU can support VT. For example, some CPUs do not support Intel Virtualization Technology (VT). In addition, you need to make sure your CPU supports virtualization. However, keep in mind that the hardware/software requirements for a Type 1 hypervisor are more stringent and more costly. It is not nearly as efficient as running the hosted OS within a Type 1 environment. If you have ever run a powerful operating system such as Windows Server within a Type 2 hypervisor such as Virtual PC, you know that a ton of resources are used and those resources are taken from the hosting operating system. Because of this, Type 1 hypervisors are the kind used for virtual servers by web-hosting companies and by companies that offer cloud-computing solutions. Generally, Type 1 is a much faster and efficient solution than Type 2. You will note that it has a variety of virtual machines inside, such as Windows 7, Windows Server, and Linux Ubuntu. Figure 13.2 shows an example of VirtualBox. Examples of this include Microsoft Virtual PC and Oracle VirtualBox. Compared to Type 1, guests are one level removed from the hardware and therefore run less efficiently. Guest operating systems run within the hypervisor. ![]() Type 2: Hosted: This means that the hypervisor runs within (or “on top of”) the operating system. Examples of this include VMware vSphere and Microsoft Hyper-V. Because of this, it is also known as bare metal. Type 1: Native: This means that the hypervisor runs directly on the host computer’s hardware.It is also known as a virtual machine manager (VMM). The virtualization workstation uses what is known as a hypervisor, which allows multiple virtual operating systems (guests) to run at the same time on a single computer. However, if you build a workstation specializing in virtualization, you can run whatever operating systems on it that you need. But if you run those at the same time on your main computer, you are probably going to bring that PC to a standstill. Did you ever wish that you had another two or three extra computers lying around so that you could test multiple versions of Windows, Linux, and possibly a Windows Server OS all at the same time? Well, with virtual software, you can do this by creating virtual machines for each OS. Virtualization WorkstationĪ virtualization workstation is a computer that runs one or more virtual operating systems (also known as virtual machines or VMs). Don’t forget, CAD/CAM computers need powerful, multicore CPUs, high-end video cards, and as much RAM as possible. ![]()
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