6.5.1

Table Of Contents
Machine SSL Certificates
The machine SSL certificate for each node is used to create an SSL socket on the server side. SSL
clients connect to the SSL socket. The certificate is used for server verification and for secure
communication such as HTTPS or LDAPS.
Each node has its own machine SSL certificate. Nodes include vCenter Server instance,
Platform Services Controller instance, or embedded deployment instance. All services that are running on
a node use the machine SSL certificate to expose their SSL endpoints.
The following services use the machine SSL certificate.
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The reverse proxy service on each Platform Services Controller node. SSL connections to individual
vCenter services always go to the reverse proxy. Traffic does not go to the services themselves.
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The vCenter service (vpxd) on management nodes and embedded nodes.
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The VMware Directory Service (vmdir) on infrastructure nodes and embedded nodes.
VMware products use standard X.509 version 3 (X.509v3) certificates to encrypt session information.
Session information is sent over SSL between components.
Solution User Certificates
A solution user encapsulates one or more vCenter Server services. Each solution user must be
authenticated to vCenter Single Sign-On. Solution users use certificates to authenticate to vCenter Single
Sign-On through SAML token exchange.
A solution user presents the certificate to vCenter Single Sign-On when it first has to authenticate, after a
reboot, and after a timeout has elapsed. The timeout (Holder-of-Key Timeout) can be set from the
vSphere Web Client or Platform Services Controller Web interface and defaults to 2592000 seconds (30
days).
For example, the vpxd solution user presents its certificate to vCenter Single Sign-On when it connects to
vCenter Single Sign-On. The vpxd solution user receives a SAML token from vCenter Single Sign-On and
can then use that token to authenticate to other solution users and services.
The following solution user certificate stores are included in VECS on each management node and each
embedded deployment:
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machine: Used by component manager, license server, and the logging service.
Note The machine solution user certificate has nothing to do with the machine SSL certificate. The
machine solution user certificate is used for the SAML token exchange. The machine SSL certificate
is used for secure SSL connections for a machine.
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vpxd: vCenter service daemon (vpxd) store on management nodes and embedded deployments.
vpxd uses the solution user certificate that is stored in this store to authenticate to vCenter Single
Sign-On.
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vpxd-extensions: vCenter extensions store. Includes the Auto Deploy service, inventory service,
and other services that are not part of other solution users.
Platform Services Controller Administration
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