ACS 4.2 failure to authenticate windows users

Question

Hi all , we have a bit of a problem which we cannot seem to resolve.
The ACS can authenticate people using local database , it can also authenticate a single user (using windows database) if you are fast after the service is restarted , however after a few secounds, it fails to authenticate any users , the error we are seeing on the logs appear as authentication failure type : internal error. Also on the log files, the authentication request from the user does not appear in the correct group, it is thrown into the default group.
Any ideas on where we should look to the problem?

Answer 1

Hi,
Its running on windows 2003 server, is running as the system account.
Auth.log details below on a failed authentication
AUTH 04/09/2009 17:02:13 A 5789 3000 0x69 Worker 0 waiting for work
AUTH 04/09/2009 17:02:13 A 5789 1400 0x6 Worker 3 waiting for work
AUTH 04/09/2009 17:02:13 A 5789 0368 0x4 Worker 1 waiting for work
AUTH 04/09/2009 17:02:23 E 6028 3888 0x0 AllocateThread returned 0
AUTH 04/09/2009 17:02:23 A 5821 3000 0x69 Worker 0 established conn 166 with 127.0.0.1:1879
AUTH 04/09/2009 17:02:23 E 6028 3888 0x0 AllocateThread returned 1
AUTH 04/09/2009 17:02:23 A 5821 0368 0x4 Worker 1 established conn 167 with 127.0.0.1:1881
AUTH 04/09/2009 17:02:23 E 6028 3888 0x0 AllocateThread returned 3
AUTH 04/09/2009 17:02:23 A 5821 1400 0x6 Worker 3 established conn 168 with 127.0.0.1:1883
AUTH 04/09/2009 17:02:24 A 5853 0236 0x51 Worker 4 error/timeout, forcing API disconnect of connection 165.
AUTH 04/09/2009 17:02:24 A 5887 0236 0x51 Worker 4 closing conn 165 endpoint. Handled 2 messages.
AUTH 04/09/2009 17:02:24 A 5789 0236 0x51 Worker 4 waiting for work
AUTH 04/09/2009 17:02:30 E 2100 4080 0x6d External DB [NTAuthenDLL.dll]: Windows authentication FAILED (error 1783L)