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VMCA

The VMware Certificate Authority (VMCA) is a component of VMware vSphere that manages certificates for vCenter Server and ESXi hosts. Here are some key points about VMCA:

  1. Certificate Management: VMCA automates the management of certificates within a vSphere deployment, making it easier to handle the numerous certificates required.
  2. Modes of Operation:
    • VMCA Default: Uses a self-signed root certificate to issue certificates for vCenter, ESXi, and other VMware components.
    • VMCA Enterprise: Acts as a subordinate CA, issuing certificates that trust up to the enterprise CA’s root certificate.
    • Custom: Allows users to bypass VMCA and use their own certificates for VMware components.
  3. Integration with vSphere: VMCA is installed on every vCenter Server host and secures the solution without additional modifications. It provisions ESXi hosts with signed certificates when they are added to vCenter Server.
  4. Certificate Store: VMware Endpoint Certificate Store (VECS) is used to store certificates, private keys, and other certificate information locally on each host.
  5. Certificate Manager Tool: vSphere includes a Certificate Manager tool to simplify the process of managing and replacing certificates.

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