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I have an interesting situation where we have the exact same application running in a "Development" environment and another in a "Testing" environment behaving differently when authenticating with AD via LDAP. The behavior is we want LDAP to throw an Authentication Exception if a user tries to authenticate with a disabled account. In Development this works exactly as expected and we get a error as defined below (data code = 533):

http://www-01.ibm.com/support/docview.wss?uid=swg21290631

When we run this code in the Testing environment however it lets the disabled user login fine. Clearly something is configured differently with LDAP/AD in each environment right? If so what setting controls this behavior?

  • Do you have multiple domain controllers in the testing environment and are they replicating? (repadmin /showrepl) – Ryan Ries Apr 30 '16 at 14:08
  • We are not replicating in the test environment. – nwallman May 2 '16 at 14:38
  • so, just to make sure - both applications are using the same LDAP source? - sounds like kerberos or local caching to me. - you don't say how the app is integrated is it ldap bind or dir sync? – Sum1sAdmin May 3 '16 at 9:44
  • I'm more or less authenticating as shown in this documentation: docs.oracle.com/javase/jndi/tutorial/ldap/security/ldap.html – nwallman May 3 '16 at 14:12
  • 2
    try disabling local user credential caching support.microsoft.com/en-us/kb/172931 – Oxymoron May 6 '16 at 6:58
2

Looks like this is a bug with Microsoft AD and Guest Account, fix is disabling the guest account.

Guest Accounts on AD Server

  • I don't really see this as a bug per se. It's likely a combination of the way JNDI handles LDAP binding and the default settings of AD allowing anonymous (aka Guest) binds. Disabling the guest account is just a hacky way to disallow anonymous binds. You can do it more elegantly with group policy. – Ryan Bolger May 11 '16 at 22:46

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