I am trying to synchronize my clock with a NTP server by following the instructions here http://support.ntp.org/bin/view/Support/GettingStarted , but this works only with some connections, not with others.
I am on Mac OS X El Capitan 10.11.2, and I am using a WIFI connection (A). I picked server ntp.your.org and I synchronize my computer with it:
$ sudo ntpdate -b ntp.your.org 31 Mar 20:05:04 ntpdate: step time server 220.127.116.11 offset -0.005629 sec $ ntpdc -c peers nodename nor servname provided, or not known $ ntpq -pcrv nodename nor servname provided, or not known
On the other hand, if I do the same by switching my internet connection to a different WIFI network (B), I get a different output:
$ sudo ntpdate -u -b ntp.your.org 3 Apr 18:22:07 ntpdate: step time server 18.104.22.168 offset 0.153946 sec $ ntpdc -c peers remote local st poll reach delay offset disp ======================================================================= =ntp.your.org 172.20.10.4 1 64 1 0.15540 0.158759 2.81735 $ ntpq -pcrv remote refid st t when poll reach delay offset jitter ============================================================================== ntp.your.org .CDMA. 1 u 9 64 3 140.650 -1.642 160.401 associd=0 status=c012 leap_alarm, sync_unspec, 1 event, freq_set, version="ntpd email@example.com Fri May 28 01:20:53 UTC 2010 (1)", processor="x86_64", system="Darwin/15.2.0", leap=11, stratum=16, precision=-20, rootdelay=0.000, rootdisp=1.140, refid=INIT, reftime=00000000.00000000 Mon, Jan 1 1900 0:09:21.000, clock=daabc1ea.c9fead6c Sun, Apr 3 2016 18:23:06.789, peer=0, tc=3, mintc=3, offset=0.000, frequency=-47.221, sys_jitter=0.000, clk_jitter=0.001, clk_wander=0.000
I previously posted this question here, and the answers pointed out that this may due to the fact that port 123/UDP might be blocked when using A. In this regard, here is a snapshot of the port settings for connection A
As you can see, I enabled NTP on port 123 in both directions (line 9 and 22). However, I still get the errors above when using connection A.
Do you have any solution in mind?