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SAS 018 – Patch Management

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In today’s episode I talk about patching various types of systems and my recommendations for each.

Workstations

  • BIOS/Firmware
    • Update at deployment then as needed
  • Drivers
    • Update at deployment then as needed
  • OS
    • Update monthly
    • Delay one month from release date unless critical
  • Applications
    • Enable auto-update if available
    • Update monthly if reasonable, otherwise as needed
      • Level of effort
      • Cost

Servers

  • BIOS/Firmware
    • Update at deployment then as needed

  • Drivers
    • Update at deployment then as needed
  • OS
    • Update monthly
    • Delay one month from release date unless critical
  • Applications
    • Deploy stable version and update annually or as needed

Networking

  • Firmware
    • Deploy stable version and update annually or as needed

Printers

  • Firmware
    • Deploy stable version and update annually or as needed
  • Drivers
    • Deploy stable version and update as needed

Mobile

  • Smartphones
    • Update major version as stable
    • Enable auto-update for minor version if historically stable
    • Apps should auto-update, delayed if necessary for testing
  • Tablets
    • Update major version as stable
    • Enable auto-update for minor version if historically stable
    • Apps should auto-update, delayed if necessary for testing

Misc

  • IOT
    • Try to deploy only if reputable manufacturer
    • Enable auto-updates
  • Intrusion Prevention
    • Deploy stable version and update annually or as needed
  • Access Control
    • Deploy stable version and update annually or as needed
  • Fire Alarm
    • Deploy stable version and update annually or as needed

Final Thoughts

  • Keeping systems updated is typically around 25% of your time as a SysAdmin
  • Depending on the system much of this work will need to be completed after hours
  • Choosing how often a system is updated is an important balance between required up time, stability and security
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