As Mark said, there are products that will do this on certain flavours of *nix. However they have their own, erm, peculiarities. The one that we used at my last job insisted on using it's own version of the pam modules to keep everything under control. I wasn't very happy about this but the architecture team had made a "decision". And then I discovered that it didn't work with a p/w that began with a capital letter (sigh) and then the fix insisted on running suid root (sigh). I was made redundant before they got a decent version in. And this didn't run under Linux for S/390 at the time... but times change... I wasn't impressed. (Don't ask me the name, I could give you one but I'm not certain that it wouldn't be the controlled su cmd one.)
In my playing round with NIS on my Solaris courses, it seemed reasonable. NIS+ on the other hand...
Rod
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