I have an endpoint on my gateway which has to be protected by SiteMinder. As soon as I get to the 'Authenticate with CA Signle Sign On' assertion, API gateway fails with the 'Authentication required' errors in gateway. I would expect a basic authentication prompt instead.
Properties of that assertion:
se;ected 'Use Last Credentials'
Checked : 'username/password'
Referring to correct prefix.
However when I doisable this assertion and use 'Authoruze via Single sign on' am able to authorize access with a existing SMSESSION. Documentation is pretty cumbersome around this integration and appreciate any insight.