The most common way to configure the security stance of our ESXi hosts is through the vSphere Client. vSphere Client can be connected directly to a host that is not managed by vCenter or can be connected to vCenter and manage the host centrally. While vSphere 5.5 has features that are only available in the vSphere Web Client, for the purposes of configuring the ESXi host security profile, we'll use the vSphere client.
In order to proceed, we require access to a vSphere Client. The client can be run on any modern Windows desktop operating system or server operating system.
The vSphere Client can be downloaded from the link provided on the ESXi host web page, in our example http://192.168.10.10, or from www.vmware.com as a component of the vCenter server: https://my.vmware.com/web/vmware/evalcenter?p=vsphere-55.