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ESXi Firewall Disabled

Detects the ESXi firewall being turned off or switched to a default allow. The firewall is the host filter for management services. Disabling it, or setting the default action to accept, lets later connections reach…

Description

Detects the ESXi firewall being turned off or switched to a default allow. The firewall is the host filter for management services. Disabling it, or setting the default action to accept, lets later connections reach services that were previously blocked.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

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Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source category
event_index

Known benign triggers

  • Firewall changes are part of some network troubleshooting and product installs. Confirm the change was temporary and that `--enabled true` and a DROP default action were restored.

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