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Apple Pro Training Series: OS X Lion Server Essentials by Ben Greisler, Arek Dreyer

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Troubleshooting

Because Open Directory includes several services, there are several log files used for tracking status and errors. You can use Server Admin to view status information and logs for Open Directory services. For example, you can use the password-service logs to monitor failed login attempts for suspicious activity, or use the Open Directory logs to see all failed authentication attempts, including the IP addresses that generated them. Review the logs periodically to determine whether there are numerous failed tries for the same password ID, which would indicate that somebody might be generating login guesses. It is imperative that you understand where to look first when troubleshooting Open Directory issues.

Accessing Open Directory ...

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