After this lesson, you will be able to: Understand patch management at scale across diverse fleets.
Most breaches exploit known vulnerabilities with available patches. Patching is the cheapest, highest-impact control. Doing it at fleet scale is harder than it sounds.
Compatibility (will this break our app?). Reboot windows (production servers). Bandwidth (10K endpoints downloading the same patch). Visibility (do we even know what's installed?).
1. Inventory, know what's installed (asset mgmt).
2. Vulnerability scan, find what's missing patches.
3. Test patches in non-prod ring.
4. Deploy to prod in waves.
5. Verify (re-scan).
6. Track exceptions with risk acceptance signoff.
Microsoft WSUS / Intune. Windows. Jamf, macOS. Linux: ansible, puppet, package-manager + cron. Cross-platform: Tanium, Ivanti, Automox.
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