title: How to disable Service provider initialized SSO in Spring SAML?
body: <p>My product uses only Identity Provider initialized SSO and it works fine.
  Requests to <a href="http://localhost:8080/saml/SSO" rel="nofollow">http://localhost:8080/saml/SSO</a> are validated. For correct requests a session is created, for wrong ones I am getting status 401.</p>
  
  <p>I have problem with incoming requests to other endpoints (ones that should be secured), like 
  <a href="http://localhost:8080/messages" rel="nofollow">http://localhost:8080/messages</a></p>
  
  <p>When request has correct, authenticated session id  it works fine.
  But for not authenticated requests, I am redirected to my Identity provider page, with URL</p>
  
  <p>https:///sso/SSO?SAMLRequest=</p>
  
  <p>How to disable that behavior? I want just to reject those requests with 'Authentication failed' response, without any interaction with Identity provider.</p>