If you ever use Mac OS X client as a file server, or any type of server where you want some users to have access to SSH and others not, you can easily make it happen by using our old friend NetInfo Manager Applications > Utilities > NetInfo Manager. You can, very quickly, make sure that pesky user does not have shell access by defining the shell for the user as /bin/false. Sure there are other command line ways to do it, but come on, any chance to work with NetInfo Manager…you are going to take it!
