From: Frank Schaare [mailto:[EMAIL PROTECTED] 
> we�re building an Intranet application running on Tomcat 
> 4.1.30 (Client 
> OS is Win2K). It would be very suitable to authentificate the users 
> against the NT Domain Controller to avoid a second login.
> 
> I searched this ML and Google but did not find very much 
> about this theme.
> 
> There is a SourceForce Project called NTDCRealm which seems 
> to fit our 
> needs, but has absolutely no documentation.
> 
> Probably, we need to nest a custom NTDCRealm Tag in our 
> WebApp context. 
> To learn, how to do this, i searched the Tomcat documentation 
> (http://jakarta.apache.org/tomcat/tomcat-4.1-doc/realm-howto.h
> tml#Standard%20Realm%20Implementations)
> and again, there is a gap:
> 
> "It is also possible to write your own Realm implementation, and 
> integrate it with Tomcat 4. However, doing this is beyond the 
> scope of 
> this document. See (FIXME - reference to developer stuff) for more 
> information."
> 
> Here are my questions:
> 
> Does this reference to developer stuff exist anywhere ?
Short of reading the source code, no.

> Does anyone ever made the NTDCRealm to work ?
Not to my knowledge.

> Does anyone knows another (documentatet) Implementation of NT 
> authentification ?
I believe you can put IIS in front of Tomcat and use IIS to do the
authentication.
There are windows authentication modules you can use with JAAS and a JAAS realm
provided with Tomcat.

> Any hints, links, documents about this theme are warmly welcome.
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jk2/index.html



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