You can customize many of the essential security settings for your host through the Security Profile panel available in the vSphere Web Client . The Security Profile is especially useful for single host management. If you are managing multiple hosts, consider using one of the CLIs or SDKs and automating the customization.
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ESXi Firewall Configuration ESXi includes a firewall that is enabled by default. Customizing ESXi Services from the Security Profile ESXi host includes several services that are running by default. You can disable services from the security profile, or enable services a if company policy allows it. Enable or Disable a Service in the Security Profile vSphere Web Client . Lockdown Mode ESXi hosts, you can put them in lockdown mode. In lockdown mode, operations must be performed through vCenter Server by default. Manage the Acceptance Levels of Hosts and VIBs
