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