ESXi NTP Security Configuration

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To further extend the hardening of my VMware ESXi hosts, I have been working on scripted ESXi NTP Security Configuration. I wanted to restrict access to the host’s NTP client to the configured NTP Server IPs. Per default, the host firewall is configured to allow all IPs if a service is enabled. You can add Allowed IP Addresses for an ESXi Host via vSphere Client, vSphere Web Client, vCLI, or PowerCLI. The ESXi Host Client does currently not offer this ability. The desired ESXi NTP Security Configuration looks like this in the vSphere Client: But as usual, it is not an

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