Ok: I have a RHEL 3.0 box and a Fedora Core 3. I am using pam_ldap for system authentication. They have the exact same configuration files and parameters. I copied the files from the working box to the malfunctioning system. I can execute getent passwd and see all of the user names that are available through ldap. However, when I try and login it fails. When I try and su to a vlaid user I get an 'incorrect password' error. I have tcpdumped the traffic and watched the logs on teh ldap server, the system is connecting and there has been no failure due to acls. However, when I run debug withe the pam module I get a pam_ldap: simple bind failure. Has anyone else come across anything like this? Thanks, Jon