Appendix C. Understanding the Local KDC
The local Key Distribution Center (LKDC) feature, new to Mac OS X v10.5 and Mac OS X Server v10.5, facilitates single sign-on for Apple Filing Protocol (AFP) file sharing and screen sharing. Because the LKDC shows up when you look at various configuration files, you may want to understand how it fits in with the other authentication services. The bottom line is that once your computer running Mac OS X or Mac OS X Server joins a Kerberos realm, its services no longer use the LKDC, and it shouldn’t interfere with authentication.
Every computer running Mac OS X v10.5 and Mac OS X Server v10.5 has its own LKDC that facilitates access to the Kerberized services running locally.
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