I have a Ubuntu machine that is configured SSSD for Authentication to Active Directory Kerberos Domain.
The Kerberos setup works well on this machine. No issues accessing AD protected File Shares. However when I try to configure Apache Directory Studio to use GSSAPI (Kerberos) to connect to the Active Directory LDAP port (636), I get the following exception: The authentication failed - javax.security.auth.login.LoginException: Unable to obtain Principal Name for authentication org.apache.directory.api.ldap.model.exception.LdapException: javax.security.auth.login.LoginException: Unable to obtain Principal Name for authentication at org.apache.directory.ldap.client.api.LdapNetworkConnection.bindAsync(LdapNetworkConnection.java:1657) at org.apache.directory.ldap.client.api.LdapNetworkConnection.bind(LdapNetworkConnection.java:1543) at org.apache.directory.studio.connection.core.io.api.DirectoryApiConnectionWrapper$2.run(DirectoryApiConnectionWrapper.java:444) at org.apache.directory.studio.connection.core.io.api.DirectoryApiConnectionWrapper.runAndMonitor(DirectoryApiConnectionWrapper.java:1171) at org.apache.directory.studio.connection.core.io.api.DirectoryApiConnectionWrapper.doBind(DirectoryApiConnectionWrapper.java:457) at org.apache.directory.studio.connection.core.io.api.DirectoryApiConnectionWrapper.bind(DirectoryApiConnectionWrapper.java:303) at org.apache.directory.studio.connection.core.jobs.CheckBindRunnable.run(CheckBindRunnable.java:79) at org.apache.directory.studio.connection.ui.RunnableContextRunner$1.run(RunnableContextRunner.java:127) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122) Caused by: javax.security.auth.login.LoginException: Unable to obtain Principal Name for authentication at com.sun.security.auth.module.Krb5LoginModule.promptForName(Krb5LoginModule.java:841) at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:704) at com.sun.security.auth.module.Krb5LoginModule.login(Krb5LoginModule.java:617) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at javax.security.auth.login.LoginContext.invoke(LoginContext.java:755) at javax.security.auth.login.LoginContext.access$000(LoginContext.java:195) at javax.security.auth.login.LoginContext$4.run(LoginContext.java:682) at javax.security.auth.login.LoginContext$4.run(LoginContext.java:680) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:680) at javax.security.auth.login.LoginContext.login(LoginContext.java:587) at org.apache.directory.ldap.client.api.LdapNetworkConnection.bindAsync(LdapNetworkConnection.java:1644) ... 8 more javax.security.auth.login.LoginException: Unable to obtain Principal Name for auth