
Appendix A      Troubleshooting
Database Issues
A-8
User Guide for Cisco Secure ACS for Windows Server
78-16592-01
External databases not operating properly. Make sure that a two-way trust (for dial-in check) 
has been established between the Cisco Secure 
ACS domain and the other domains.
If Cisco Secure ACS is installed on a Member 
Server and is authenticating to a Domain 
Controller, see the “Authentication Failures When 
ACS/NT 3.0 Is Authenticating to Active 
Directory” Field Notice at the following URL:
http://www.cisco.com/en/US/products/sw/
secursw/ps2086/
products_field_notice09186a00800b1583.shtml
Cannot install Novell NDS database 
authentication.
Make sure Novell Requestor is installed on the 
same Windows server as the Cisco Secure ACS.
Unknown users are not authenticated. Go to External User Databases > Unknown 
User Policy. Select the Check the following 
external user databases option. From the 
External Databases list, select the database(s) 
against which to authenticate unknown users. 
Click —> (right arrow button) to add the database 
to the Selected Databases list. Click Up or Down 
to move the selected database into the desired 
position in the authentication hierarchy.
If you are using the Cisco Secure ACS Unknown 
User feature, external databases can only 
authenticate using PAP.
Novell NDS or Generic LDAP Group Mapping not 
working correctly.
Make sure that you have correctly configured 
Group Mapping for the applicable database.
For more information, see Chapter 16, “User 
Group Mapping and Specification”.
Condition Recovery Action