http://serverfault.com/questions/152134/pam-ldap-authentication-with-ubuntu-10-04
http://www.zytrax.com/books/ldap/ch6/slapd-config.html
http://wiki.idefix.fechner.net/index.php/FreeBSD-LDAP
http://www.linupedia.org/opensuse/Ldif
http://www.linux-club.de/viewtopic.php?f=59&t=43999
http://wiki.ubuntu-forum.de/index.php/OpenLDAP
https://help.ubuntu.com/community/LDAPClientAuthentication
https://help.ubuntu.com/9.10/serverguide/C/openldap-server.html
http://ubuntuforums.org/showthread.php?t=28102
http://hannibal.solstice.nl/hannibalwiki/doku.php?id=hannibal:start