Chapter 4 provides essential information regarding software hardening as well as instructions on the elimination of unnecessary software. Maintaining a record of what software is installed on each server is a critical step in preparing for recovery. Documenting configuration is also important. Finally, make sure to record changes that are made, including configuration, software installation and removal, and patching and updating.
|Heads Up|| |
It is a sound practice to document in a journal all changes made after installation, recording details of every change made. At some future time someone may need to reinstall the system without the benefit of your knowledge and common sense. Second-guessing a previous administrator's installation decisions is not pleasant and leaves risk of some important matter being overlooked.