I am not the right person to write this page, but here is a rough outline. There are basically three options with several variants - [[KaServer]] -- the standard option to comes with IBMAFS, implements [[KerberosIV]] with some custom features. - [[KerberosIV]] -- the original MIT implementation, and [[Krb4KTH]], an export version of [[MITKerberosIV]] (aka "bones"), but with encryption support put back in by the fine folks at KTH. - [[KerberosV]] -- version five of this protocol has numerous improvements over version four and is available from many sources: MIT, DCE, Microsoft (aka [[ActiveDirectory]]) and [[HeimdalKTH]]. The consensus these days is to use [[KerberosV]], even though lacking native support for V5, AFS still needs various conversion and migration tools. -- [[TedAnderson]] - 22 Jan 2002 Some other topics that should be explained. - SSH -- these instructions from [[CharlesClancy]] for building openssh might help . And another perspective from [[OwenLeBlanc]] . -- [[TedAnderson]] - 23 Jan 2002