Learn how to hide KVM Hypervisor signature. Our KVM Support team is here to help you with your questions and concerns.

Hide KVM Hypervisor signature

Hiding the KVM hypervisor boosts the security of virtualized environments. It works by hiding the fact that KVM is in use as the underlying hypervisor.

This makes it more challenging for potential attackers to target vulnerabilities or attack vectors associated with KVM.

Here are some key reasons for hiding the KVM hypervisor signature:

• It makes it more difficult for attackers to determine the hypervisor in use.
• KVM has some vulnerabilities that attackers can exploit. By hiding the hypervisor’s identity, we can reduce the risk of attacks that use these vulnerabilities.

Although hiding the hypervisor signature is important, it should be a part of a larger security strategy. In other words, it should not be the sole means of security.

How to hide the KVM hypervisor signature

1. To begin with, we have to take a backup of our system.
2. Then, head to the configuration settings of our VM.
3. The CPUID instruction helps virtualization-aware software to detect the presence of a hypervisor. So, we can hide KVM by modifying the CPUID flags. To do this, we have to add or modify the <cpu> in the XML configuration of our VM:

   
xml
<cpu mode='custom' match='exact'>
<model fallback='allow'>qemu64</model>
<feature policy='disable' name='hypervisor'/>
</cpu>


   This removes the hypervisor flag from the CPUID information presented to the guest OS.
4. Now, it is time to restart the VM to apply the modified CPUID information.
5. Finally, we have to test our VM to make sure it functions correctly after this change. Also, monitor the performance to verify that hiding the hypervisor signature does not effect the VM’s operation.

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Conclusion

In brief, our Support Experts demonstrated how to hide the KVM Hypervisor signature.