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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[43114]: step time server 204.9.54.119 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[1186]: step time server 204.9.54.119 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 4.2.6@1.2089-o 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?
can you open port 123 without a source port? e.g so its the same as all the other entries? – user3788685 – 2016-04-03T17:14:17.297
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Welcome to Super User. You can freely edit your own posts but for your protection, this must be done under the original user account. It looks like you have created a second account, which will also interfere with your ability to comment within your thread and to accept an answer. See Merge my accounts to get your accounts merged, which will solve the problem.
– fixer1234 – 2016-04-03T18:51:50.957