Yes - you will need to open up a support ticket so that this can be discussed with your team as to what is required, the pros/cons pitfalls etc. Specific ports will need to be opened, etc. But all in all, yes, we have customers running LDAP in Cloud.
That being said, if you have a SAML SSO solution, that is a much better way to integrate SSO to your Splunk Cloud instance. With v6.5.x we support any IdP that is SAML 2.0 compliant. If it is an IdP that we have not integrated with before in the past, we will work with you to get it set up, then document how it was done. If it is one that we've integrated with before, we'll simply send you information on how to get it up and running, and assist you in the integration if required.
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