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Virtual Machine Security

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Prerita Agarwal
Data Specialist @
23 Jul, 2024 @ 01:30 PM


The word "Cloud" refers to a network or the Internet. In other terms, the Cloud is something that exists in a remote location. The cloud can provide services over both public and private networks, such as WAN, LAN, and VPN. Cloud Computing is a service-oriented architecture technique that performs computational operations using virtualized resources. Similarly, A virtual machine (VM) is a digital substitute for a real computer. Virtual machine software is capable of running programs and operating systems, storing data, connecting to networks, and performing other computer operations Digitally. Still, it requires regular maintenance, such as updates and system monitoring. Since a VM( Virtual Machine) stores and accesses lots of data and can be misused and manipulated easily. Therefore we must ensure all the security features to protect data. 

Virtualized Security

The co-resident attack is a severe security threat in cloud infrastructure. Tenant virtual machines (VMs) security in cloud computing can be assigned on the same host using virtualization technology supplied by Cloud Service Provider. A multi-tenant environment allows hostile renters to undertake a co-resident attack and steal information from other tenants via side channels. Organizations focus on eliminating side channels to prevent this type of attack.

Virtualized security, often known as security virtualization, refers to software-based security solutions designed to operate in a virtualized IT environment. This is in contrast to traditional, hardware-based network security, which is static and operates on devices such as firewalls, routers, and switches.

Unlike hardware-based security, virtualized security is adaptable and dynamic. Instead of being connected to a specific device, it can be installed anywhere on the network and is frequently cloud-based. This is critical for virtual machine security in cloud computing, where operators constantly spin up workloads and applications; virtualized security allows security services and functions to move around with those dynamically produced workloads. These are the points that must be followed to make VM secured.

  • Protecting the guest operating systems
    To keep your guest operating system safe, ensure it has the most recent patches and, if necessary, anti-spyware and anti-malware software. Examine the documentation provided by your guest operating system provider, as well as any other material accessible in books or on the Internet about that operating system.
  • Use templates and scripted management
    Virtual machine templates allow you to configure the operating system to match your needs and then build more VMs with the same parameters. Consider using scripts like PowerCLI to alter virtual machine parameters after the first deployment. This guide explains how to use the GUI to execute tasks. To keep your environment consistent, consider using scripts instead of the GUI. To optimize scripting in large environments, virtual machines can be organized into folders.
  • Consider UEFI secure boot.
    You may set up your virtual computer to boot from UEFI. If your operating system supports secure UEFI boot, you can enable it for your VMs for added protection.
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How does Virtual Security work?

Virtualized security can simulate the functionalities of traditional security hardware appliances (such as firewalls and antivirus protection) and deliver them through software. Furthermore, virtualized security can carry out additional security functions. These functions are only available because of the benefits of virtualization, and they are designed to address the unique security requirements of a virtualized system.

To decrease the potential attack surface, a business can, for example, install security measures between the application layer and the underlying infrastructure or utilize tactics such as micro-segmentation.

Virtualized security can be implemented as an application running directly on a bare-metal hypervisor (from which it can provide good application monitoring) or as a hosted service running on a virtual machine. Unlike physical security, which is bound to a single device, it can be instantly deployed where it is most effective.


Security virtualization serves as a barrier to secure network perimeter access. As an additional managed service, it offers dedicated security services and guaranteed traffic isolation within the cloud, as well as customizable firewall settings. Enterprises and service providers can use their virtualization investment to create a granular security perimeter, providing tenants and service subscribers with dedicated security resources within a cloud construct.

Benefits of Virtualized Security

Virtualized security is now needed to fulfil the complex security demands of a virtualized network, and it is more flexible and efficient than traditional physical security.

  • Less Expenditure
    Virtual machine security in cloud computing enables a company to maintain a secure network without incurring significant additional costs for expensive proprietary hardware. Pricing for cloud-based virtualized security services.
  • Flexible in Nature
    Virtualized security services can track workloads everywhere, which is essential in a virtualized environment. It protects data across various data centers, as well as in multi-cloud and hybrid cloud scenarios, allowing a company to get the full benefits of virtualization while also keeping data secure.
  • Operational Effectiveness
    Virtualized security is faster and easier to implement than hardware-based security because it eliminates the need for IT personnel to set up and configure multiple hardware appliances. Instead, they can deploy security solutions using centralized software, allowing quick expansion. Using software to run security technologies also allows security chores to be automated, giving IT workers more time.
  • Regulatory Compliance
    Traditional hardware-based security is static and incapable of meeting the demands of a virtualized network, making virtual machine security in cloud computing a must-have for enterprises that must maintain regulatory compliance.

Essential Steps to Secure Virtual Machine

  • Keep connections secure and separate.
    Virtual networking is an excellent approach to creating flexible connections to redeployed or scaled features. Still, each time a virtual network modification is made, it is likely that an unintended connection will be established between two different services, tenants, or features/functions deployments. This can result in a data plane leak, a connection between actual user networks, or a management or control leak, allowing one user to influence the service.
  • Separate management APIs are used to secure the network.
    The second step is to isolate infrastructure management and orchestration from the service itself. Because management APIs are designed to regulate features, functionalities, and service behavior, they will always pose a significant risk. It is crucial to protect all such APIs, but especially those that control infrastructure parts that should never be accessed by service consumers.
  • Ensure that all components have been tested and verified.
    Before allowing virtual features and functions to be implemented, step three in cloud-virtual security is to certify them for security compliance. Outside attacks are a significant danger with virtual networking, but inner attacks are disastrous. When a feature with a back-door security flaw is added to a service, it becomes part of the service infrastructure and is much more likely to have open attack routes to other infrastructure pieces. It is critical to insist on a robust lifecycle management compliance process flow for all hosted features and functionalities, one that operators can audit and confirm.
  • Protect hosted elements by isolating them
    Isolating the new hosted elements is the last step in securing virtual machine security in cloud computing. For example, three features contained within an edge device could be delivered in the cloud as a part of the service data plane, with addresses accessible to network users, or as part of an invisible private subnetwork. If you deploy in the cloud, any of the features can be attacked, and your hosting and administration operations may become visible and vulnerable as well. When you isolate your hosting and feature connections within a private subnetwork, they are safe from unauthorized access.

I hope now you have a clear understanding of the point while securing a Virtual Machine. Let us move to the Frequently Asked Questions Section.

Frequently Asked Questions

What are the unique security issues virtualization produces in IT environments?

The two most significant issues introduced by virtualization are, first, the high degree of misconfiguration and errors caused by the frequent changes made to virtual machines (VMs); and, second, the mixed-mode use of VM hosts (e.g., where high-value VMs are on the same host as Web servers and Internet-connected servers), which necessitates proper VM isolation.

Who should manage the Virtual Machine firewall policies?

In general, management is a collaborative effort. Security administrators define the policies, and they are refined by virtualization infrastructure managers, who have greater context and expertise on the use and essential isolation requirements of the VMs.

How Do Virtual Machines Work?

Virtual machines are enabled via virtualization technology. Virtualization employs software to replicate virtual hardware, allowing numerous virtual machines (VMs) to run on a single computer. The physical machine is called the host, and the VMs that run on it are called guests.

Why would someone use a virtual machine?

Because a virtual machine behaves like a completely different computer that does not require additional hardware, it has various possible applications:

Running software that necessitates the use of multiple operating systems, creating software for a different platform, different amounts of processing power are accommodated, application testing in a secure environment, obtaining access to virus-infected data, creating backups of the operating system, creating virtual servers, creating system snapshots that you can restore at any time.


In this article, we have extensively discussed Virtual Machines, the benefits of preferring virtual machines over physical Machines, and how to Secure them to avoid data leaks and privacy features.

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Topics covered
Virtualized Security
How does Virtual Security work?
Benefits of Virtualized Security
Essential Steps to Secure Virtual Machine
Frequently Asked Questions
What are the unique security issues virtualization produces in IT environments?
Who should manage the Virtual Machine firewall policies?
How Do Virtual Machines Work?
Why would someone use a virtual machine?