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Repeated 'Unpatched' Alerts Were Stale; Monitoring Split Into Two Tiers

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An automated cloud routine that tracked security releases for PHP and other software kept sending urgent alerts claiming a production server was unpatched for 16 days. When the author checked the server directly, the PHP update had actually been applied two days after its release, because the cloud tool could not see what was installed locally. The author then divided the monitoring into two tiers: a cloud collector for release announcements and a local checker that queries each server's package manager for the real installed state. Using the package manager as the single source of truth for patch status eliminated the false alarms. The author also set rules such as never executing commands taken from summaries and limiting automatic patching to OS security updates.

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