Hello here at my job we have a custom user management system other than the typical AD/LDAP and I was looking for way to be able to support a custom access layer for splunkweb. Since it already supports AD/LDAP maybe it would not be difficult to add another authentication mechanism to it?
Not done this myself, however Splunk does have authentication API. You should probably start with the following documentation:
You can create your own authentication for Splunk to use, see http://docs.splunk.com/Documentation/Splunk/latest/Security/ConfigureSplunkToUsePAMOrRADIUSAuthentic... for more info. Basically you write a Python script that delegates authentication to your custom system.