Using custom authentication and integrated authentication in the same time in different subsites?

From: Dean Kuntz (mulleteer_at_ziplip.com)
Date: 04/25/05 

Date: 25 Apr 2005 08:23:16 -0700

Hello,

Platform:
Windows Server 2003
IIS 6.0

I have several subsites in a single web site. Is it possible to have
one subsite to use custom login utilizing the CustomAuth.dll (provided
in e.g. IIS 6.0 resource kit) while preserving the integrated windows
authentication in the other subsites? Hierarchically the subsites are
on the same level and they are not nested. To me it seems like the
customauth.dll should be installed as an ISAPI filter and thus it will
affect all the subsites. Is this correct? I played around a little
hoping that it would work individually for each application (like
subsites) and installed the customauth.dll as wildcard mapping and
allowed it in web service extensions, allowed only anonymous access to
the directory and finally removed anonymous read rights from a test
file, but it seemed that then accessing that test file any of the
authentication methods were not working (I just got 401.2 response
without any authentication firing).