ldap provider on IIS websites

[bshbsh]

I have a website running on IIS 6, windows 2003 Ent. There is an another department which maintains a LDAP provider. The users of this department need access to this site. Basically users have to login to access this site. Could I setup IIS in such a way that it prompts users for username/password, queries their LDAP provider for username/password and lets them in once they successfully authenticate?
I know I can use Windows Int Auth if the webserver is part of a domain. But this is a stand alone server.
Please advice.
Thanks.

 

[bshbsh]

This is what makes me fell that it can be done from IIS.

"LDAP Routing (IIS 6.0)' and
"Setting LDAP Routing Information (IIS 6.0)'
in this site,

http://www.microsoft.com/technet/prodtechnol/WindowsSer...972703.mspx?mfr=true

Please advice.
Thanks.