tis 2016-09-13 klockan 10:43 -0700 skrev Chuck Guzis:
Heh, the first message that I got after I changed the PRAM battery and
booted MacOS was that the system time didn't match the NTP time within
reasonable limits. But there the oddity hit--if I wanted to get rid of
the message, I had to open the Control Panel and manually set the time
to something close to NTP--Mac OS did not offer to do it for me.
Which is how it is done in Linux today - if the system clock is to much
off ntpd won't touch it.
What would happen if the selected ntp server which ntpd wants is cracked
and intentionally serving false time ?
For ntpd it is a security feature that it won't change a system time
which is badly out of sync.
ntp is intentionally designed so that it will only change system time
gradually.