You can use the NeST command to control which protocols that Open Directory uses in Mac OS X 10.4 server. To do so you’re going to use the -setprotocols option from the command line, followed by the protocols you would like to disable and then the off string. For example, the following would disable APOP:
NeST -setprotocols APOP off
The following would then reenable it:
NeST -setprotocols APOP on
