7 Ways to Secure a Facility

• Assess existing systems
  
• Establish control systems security policies and procedures
  
• Assure personnel are aware of importance of security and company policies
  
• Segment networks using defense-in-depth
  
• Control access to control system resources
  
• Harden computer systems by removing or disabling unused communication ports, applications and services
  
• Monitor the system

Source: John Cusimano, director of security solutions, exida (www.exida.com), Sellersville, Pa.