Securing VMWare Guest OSs
Maintain VMWare Guest OSs as you maintain other security-critical resources in your organization. For example:
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Keep up to date on security patches for OS and third-party applications.
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Use the OS firewall in addition to other security mechanisms.
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Take appropriate backups.
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Protect data stored in the virtualized environment.
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Follow best practices for applications, including:
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Change all default passwords.
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Use encryption on network connections as appropriate.
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Enable and review security audit.