I have an heterogeneous system in my office with different OS and they change rapidly. I was looking for a solution to get authentication in a distributed way like OpenID so I can login machine_A using user@machine_B, is not important to get authorization and accounting globally distributed only authorization matters, and LDAP is too big for my needs. cheers
Check out OS X Server's Open Directory. it'll authenticate Macs, Linux and Windows (via a NT4 style domain, but it works). More importantly, it's just a bunch of easy clicky buttons to set everything up; very little in the way of difficult configuration is necessary to get it going. It does tend to be a bit of a black box when anything goes wrong, but is rather stable and so that doesn't happen terribly often. The only thing is it doesn't scale all that well over remote links; so if you have WAN connections in the middle of some of your users you probably want to look elsewhere.