ESXI-67-000061 - The virtual switch Promiscuous Mode policy must be set to reject on the ESXi host.

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Information

When Promiscuous Mode is enabled for a virtual switch, all virtual machines connected to the Portgroup have the potential of reading all packets across that network, meaning only the virtual machines connected to that Portgroup.

Promiscuous Mode is disabled by default on the ESXi Server, and this is the recommended setting. Promiscuous Mode can be set at the vSwitch and/or the Portgroup level. Switch-level settings can be overridden at the Portgroup level.

Solution

From the vSphere Client go to Configure >> Networking >> Virtual Switches.

For each virtual switch and port group, click Edit settings (dots) and change 'Promiscuous Mode' to reject.

or

From a PowerCLI command prompt while connected to the ESXi host, run the following commands:

Get-VirtualSwitch | Get-SecurityPolicy | Set-SecurityPolicy -AllowPromiscuous $false
Get-VirtualPortGroup | Get-SecurityPolicy | Set-SecurityPolicy -AllowPromiscuousInherited $true

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_6-7_Y22M10_STIG.zip

Item Details

References: CAT|II, CCI|CCI-000366, Rule-ID|SV-239315r674874_rule, STIG-ID|ESXI-67-000061, Vuln-ID|V-239315

Plugin: VMware

Control ID: 0aaed8a87a5e9969d593d272d2d9993156f79f11958431cf7e5fc03bc573a363