Single sign on problem with kerberos in Windows XP

[Miika Parvio]

Hello!

I'm building application, which tries to authenticate against AD server( 
Windows 2003 server). I'm using JAAS and JNDI and 
com.sun.security.auth.module.Krb5LoginModule class to handle 
authentication. I have managed to authenticate using SSO. Only problem 
is that client machine (Windows XP pro, service pack 1) is lost TGT. For 
example if I lock and unlock the work station and then then run my test 
program, everyting works well. But after a couple minutes (about 15-20 
minutes) when I'm running my test program again, it cannot find any TGT 
tickets from cache. I have checked that expiration time of TGT is 10 
hours, so that cannot be a problem. Is there some kind of bug in Windows 
XP or what? Does any one know what should I do? I have tried to solve 
this problem many days without any progress. I'm using JDK 1.5 and I 
have installed MIT kerberos for windows 2.6.5 to my client. Do I need to 
install it also to the server?


Friendly

Miika Parvio