By default, vSphere uses TLS/SSL certificates that are signed by VMCA (VMware Certificate Authority). These certificates are not trusted by end-user devices or browsers.
As a security best practice, replace at least all user-facing certificates with certificates that are signed by a third-party or enterprise Certificate Authority (CA). Certificates for machine-to-machine communication can remain as VMCA-signed certificates.
|Decision ID||Design Decision||Design Justification||Design Implication|
|CSDDC-VI-VC-022||Replace the vCenter Server machine certificate and Platform Services Controller machine certificate with a certificate signed by a third-party Public Key Infrastructure.||Infrastructure administrators connect to both vCenter Server and the Platform Services Controller using a Web browser to perform configuration, management and troubleshooting activities. Using the default certificate results in certificate warning messages.||Replacing and managing certificates is an operational overhead.|
|CSDDC-VI-VC-023||Use a SHA-2 or higher algorithm when signing certificates.||The SHA-1 algorithm is considered less secure and has been deprecated.||Not all certificate authorities support SHA-2.|