A step-by-step checklist to secure VMware:
For VMware 6.7 (CIS VMware ESXi 6.7 Benchmark version 1.1.0)
CIS has worked with the community since 2009 to publish a benchmark for VMware
Other CIS Benchmark versions:
For VMware (CIS VMware ESXi 5.5 Benchmark version 1.1.0)