Web Client: You are prompted for windows login. When you enter username/password they are not accepted.

SYMPTOMS

You have a ZyLAB web client set up with advanced security (windows integrated security).  When a user tries to log on they get prompted for a password.   When  they enter there correct password it is not accepted and they are challenged again.

CAUSE

This is related to the configuration of IIS. Windows Authentication or Windows Integrated Authentication can be configured in a number of different ways. The two most common are NTLM(challenge response) and KERBEROS(Negotiate). If you have KERBEROS enabled IE may give you this type of behavior.

RESOLUTION

There are several things you can do. 

• You can uncheck the "Enable Integrated Windows Authentication" in Interenet Explorer.  In some cases this will fix the problem.
• Another would be to change windows autentication type to NTLM in IIS.
• If you have configured a host name in addtion to the server name for example the server is server1.company.com and you create yoursite.company.com , you may have to enable KERBEROS for the second host.
• Some websites that have more information:
  • http://www.sidesofmarch.com/index.php/archive/2011/11/04/troubleshooting-windows-authentication-in-iis/
  • http://support.microsoft.com/kb/215383

APPLIES TO

6.2 Service Pack 2