The ESX host uses automatically generated certificates that are created as part of the installation process. These certificates are unique and make it possible to begin using the server, but they are not verifiable and they are not signed by a trusted, well-known certificate authority (CA).

Using default certificates might not comply with the security policy of your organization. If you require a certificate from a trusted certificate authority, you can replace the default certificate.


If the host has Verify Certificates enabled, replacing the default certificate might cause vCenter Server to stop managing the host. If the new certificate is not verifiable by vCenter Server, you must reconnect the host using the vSphere Client.


Log in to the service console and acquire root privileges.


In the directory /etc/vmware/ssl, rename the existing certificates using the following commands.

mv rui.crt orig.rui.crt
mv rui.key orig.rui.key

Copy the new certificate and key to /etc/vmware/ssl.


Rename the new certificate and key to rui.crt and rui.key.


Restart the vmware-hostd process for the certificates to take effect.

service mgmt-vmware restart