mardi 23 décembre 2014

Disabling NTP on OS X Lion or older


Following a new security vulnerability in the Network Time Protocol software package, Apple has provided a software update for Mountain Lion and newer versions of OS X.


As usual, the older versions of OS X that one may be stuck with (because the hardware does not support newer version, because one needs Rosetta, …) are not covered by the security update.


My questions are:




  • is disabling “set date and time automatically” in Software Preferences enough to ensure that ntpd is not running?




  • what might break if the ntdp binary was simply deleted for safety on OS X Snow Leopard or Lion?




In doubt I might use these instructions to limit the scope of ntpd without completely disabling/deleting it, but in this case there remains the risk of getting it wrong and leaving ntpd exposed.





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