With Splunk Enterprise it's possible to secure Splunk Web with your own certificate by copying your server certificate to /auth/splunkweb and doing some configuration in system/local/web.conf. With Splunk Cloud, I don't have access to the CLI and therefore cannot secure Splunk Web with a certificate in this way. Is there any way around this? Or do I have to send a support ticket as a change request to Splunk to get this done?
You will need to open up a ticket with Splunk support to get this done. Segmentation for compliance, security, reliability, etc. requires restricted access to the CLI. Splunk Cloud will become more and more user/GUI friendly as we progress through each version iteration over time, requiring more self service and reducing the need to leverage Splunk support for certain actions.