[snip] We are developing an intranet for my company. I would like to implement a single sign on service. We have Active Directory on one server and the intranet is being housed on a Redhat Linux server. When the internal user pulls up the intranet, I would like it to check to see if they successfully joined the domain when they logged into their personal machine, if so they do not need to log on to the intranet. Does anybody have any links to tutorials on this? Thanks! [/snip] Just to be clear, you want to take the network logon (from the Windows environment) and compare it against the AD via LDAP when someone accesses the intranet to make sure that they are authorized? I don't think that it is possible; it is a question that I have asked before. I have seen this sort of behavior before; when all of the boxes were Windows boxes (IIS web servers, etc). As far as I can tell you will have to ask the user to login at the web application level again, but you can verify it against your AD via LDAP with the basic stuff from http://www.php.net/ldap -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php