NTLM Tomcat and external users

Hi,

I am using jCIFS to authenticate the Intranet users. We used to have a 
login page that is now bypassed since the user are authenticated at 
connection time.
However, I have a good few customers who are not registered in our AD 
server and can no longer logon to the system.
Is there a way to setup jCIFS filter NTLM Filter so that in case of 
failure to authenticate it redirect to a specific page (My former login 
page for example)?

Thanks
Yannick