Configuration Management and Change Control

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Description
This lesson covers configuration and change control. These two concepts work together when forming a safe and secure infrastructure. Configuration management is defined by ISC2 as “a process of identifying and documenting hardware components, software and the associated settings,” and consists of the following:
  • The goal is the move beyond the original design to a hardened, operationally sound configuration
  • Identifying, controlling, accounting for and auditing changes made to a baseline TCB
  • These changes come about as we perform hardening tasks to secure a system
  • Will control changes and test documentation through the operational lifestyle of a system
  • Implemented hand in hand with change control
  • ESSENTIAL to disaster recovery
This lesson also discusses change management which consists of the following:
  • Directive, administrative control that should be incorporated into organizational policy
  • The formal review of all proposed changes—no “on the fly” changes
  • Only approved changes will be implemented
  • The ultimate goal is system stability
  • Periodic reassessment of the environment to evaluate the need for upgrades/modifications
Finally, this lesson also covers the change management process and patch management.
  • Request submittal
  • Risk/impact assessment
  • Approval or rejection of change
  • Testing
  • Scheduling/user notification/training
  • Implementation
  • Validation
  • Documentation
Patch management is an essential part of configuration and change management ad may come as a result of vendor notification or pen testing.
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