CAS is widely used in universities and should fit your needs. I believe that behind the scenes, the CAS server can use a LDAP server for the ultimate authentication.<br><br><a href="http://drupal.org/project/cas">http://drupal.org/project/cas</a><br>
<br clear="all">--<br>Kyle Mathews<br><br><a href="http://kyle.mathews2000.com/blog">kyle.mathews2000.com/blog</a><br><a href="http://twitter.com/kylemathews">http://twitter.com/kylemathews</a><br>
<br><br><div class="gmail_quote">On Thu, Aug 6, 2009 at 12:35 PM, Greg Knaddison <span dir="ltr">&lt;<a href="mailto:Greg@growingventuresolutions.com">Greg@growingventuresolutions.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">On Thu, Aug 6, 2009 at 7:13 AM, antgiant&lt;<a href="mailto:antgiant%2BdrupalDevel@gmail.com">antgiant+drupalDevel@gmail.com</a>&gt; wrote:<br>
</div><div><div></div><div class="h5">&gt; We have several drupal installs that all use the same LDAP setup for<br>
&gt; authentication.  We would like to setup Single Sign On for all of those<br>
&gt; sites, but it is not feasible for us to use a shared database.<br>
&gt;  Additionally, we are using LDAP groups to create the Drupal roles.  Any<br>
&gt; advice on how to accomplish this?  Thanks in advance.<br>
<br>
</div></div>I&#39;ve done this before, but it required custom code in all cases.  In<br>
my experience building these systems each one is just different enough<br>
that it wasn&#39;t something that could be contributed as a general<br>
module.<br>
<br>
Regards,<br>
Greg<br>
<font color="#888888"><br>
--<br>
Greg Knaddison | 303-800-5623 | <a href="http://growingventuresolutions.com" target="_blank">http://growingventuresolutions.com</a><br>
Cracking Drupal - Learn to protect your Drupal site from hackers<br>
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</font></blockquote></div><br>