Can a zone be an NTP client or server?
A1: A zone can be an NTP server. A2: The NTP client software sets the system time clock shared by all zones, including the global zone. By default, non-global zones cannot do this. However, the global zone administrator can give a zone the ability to change the system time clock with the “sys_time” privilege. Be aware that this changes the time clock for all zones. See http://blogs.sun.com/JeffV/entry/shrink_wrap_security1 for an example.