10 Tips For Virtualization Security Best Practices 


Safeguarding a virtual environment is essential to protect your data and ensure the security of virtual machines and infrastructure. Here are crucial steps to secure your virtualized infrastructure: 

  • Start with securing the hypervisors. Disable unnecessary services like SSH and remove unnecessary components that could give unauthorized access to your environment. Implement access controls. Keep hypervisors up-to-date with security patches and updates to address known vulnerabilities. 
  • Other essential things are isolation and segmentation. Use network and storage segmentation to isolate sensitive VMs from less secure ones. Implement firewalls and security groups to control traffic between VMs. For even more access control, you can use a VPN as well. All management interfaces, such as vCenter or Hyper-V Manager, should be on a dedicated management network. 
  • Use strong authentication, including two-factor authentication (2FA), for hypervisor management and VM access. 
  • Remember about proper monitoring and auditing solutions to detect and respond to security incidents, including tracking changes in VM configurations and monitoring network traffic. 
  • A crucial part of securing your virtual environment is having a backup and disaster recovery plan. Maintaining regular backups of your VMs and implementing a disaster recovery plan helps recover from data loss or VM corruption caused by security incidents. 
  • Not only host machines require regular updates. Keep guest VMs up-to-date with security patches and operating system and applications updates. 
  • A good rule to keep in mind is the least privilege principle. It tells us to limit the privileges and permissions granted to VMs and users. Grant only the minimum access necessary to perform required tasks. 
  • Encrypt sensitive data stored in your infrastructure. Protect access to storage systems and ensure data integrity. 
  • It is expected that human is the weakest link, which shows how necessary it is to train staff on virtualization security best practices and the importance of secure behaviors, such as not sharing credentials or using unapproved VM images or repositories. Your coworkers should also know how to respond in case of a security incident. 
  • Create standardized VM templates with hardened configurations to ensure new VMs are deployed with a solid security baseline. 

By implementing these best practices, you can significantly improve the security of your virtual environment and reduce the risk of data breaches or unauthorized access. Regularly review and update your security measures to stay ahead of emerging threats and vulnerabilities. 

09:19 AM, Oct 25


IT Systems Specialist at Storware

Adam Spinek