To replace the default certificate, you first need to generate a certificate and matching private key. I did this against my Organisations CA. See here for more information on how to do that.
First log into the ESXi host via SSH:
[andy@home-pc ~]$ ssh [email protected] -p22
Change to the /etc/vmware/ssl directory:
[root@esxi01:~] cd /etc/vmware/ssl [root@esxi01:/etc/vmware/ssl]
Rename the current certificate and private key to something else:
[root@esxi01:/etc/vmware/ssl] mv rui.crt orig.rui.crt [root@esxi01:/etc/vmware/ssl] mv rui.key orig.rui.key
Now create a new file called rui.crt and copy the certificate contents to it.
[root@esxi01:/etc/vmware/ssl] vi rui.crt
Now do the same for rui.key:
[root@esxi01:/etc/vmware/ssl] vi rui.key
Now you should hopefully just need to reboot.
[root@esxi01:/etc/vmware/ssl] reboot
If this does not work for some reason, just copy the old certificates back in place and reboot again.
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