NTP synchronized: no

[John Pilkington]

On 08/09/15 18:02, Rick Stevens wrote:
> On 09/08/2015 03:27 AM, John Pilkington wrote:
>> On 08/09/15 10:52, Ed Greshko wrote:
>>> On 09/08/15 17:29, Patrick Dupre wrote:
>>>> I cannot synchronize the date:
>>>> My undestanding is that it should be set by:
>>>> timedatectl set-ntp yes
>>>>
>>>> Here, the results of some commands:
>>>>
>>>> netstat -a |grep ntp
>>>> udp        0      0 localhost.localdo:51314 ns346276.ip-94-23-3:ntp
>>>> ESTABLISHED
>>>> udp        0      0 localhost.localdo:39994 tomia.ordimatic.net:ntp
>>>> ESTABLISHED
>>>> udp        0      0 localhost.localdo:45035 ntp.tuxfamily.net:ntp
>>>> ESTABLISHED
>>>> udp        0      0 localhost.localdo:49209 host3.nuagelibre.or:ntp
>>>> ESTABLISHED
>>>> warning, got bogus l2cap line.
>>
>> That looks different: here's mine.
>>
>> [john at HP_Box ~]$ netstat -a | grep ntp
>> udp        0      0 0.0.0.0:ntp             0.0.0.0:*
>> udp6       0      0 [::]:ntp                [::]:*
>> [john at HP_Box ~]$ netstat -a | grep 323
>> udp        0      0 localhost:323           0.0.0.0:*
>> udp6       0      0 localhost:323           [::]:*
>> plus a few irrelevant responses.
>>
>> but ...grep 123 shows nothing that looks relevant.
>>
>> Quoting from the faq:
>>
>> Perhaps you have a firewall set up in a way that blocks packets on port
>> 323/udp.  You need to amend the firewall configuration in this case.
>
> ntp is UDP port 123 as is shown in your output. By default, netstat
> will translate port numbers to services found in your /etc/services
> file. If you want to verify it, try "netstat -apn | grep :123" and you
> should see something on that port:
>
> [root at prophead ~]# netstat -pna | grep :123
> ...
> udp        0      0 192.168.1.50:58156      104.41.150.68:123
> ESTABLISHED 841/chronyd
> ...
>
> So you can see that chronyd is connected to 104.41.150.68 via UDP port 123.

Thanks Rick.  On my system, ( which does have a working chrony setup)  I 
see:

$ uname -a
Linux HP_Box 3.10.0-229.11.1.el7.x86_64 #1 SMP Wed Aug 5 14:37:37 CDT 
2015 x86_64 x86_64 x86_64 GNU/Linux

[john at HP_Box ~]$ netstat -pna | grep :123
(Not all processes could be identified, non-owned process info
  will not be shown, you would have to be root to see it all.)
udp        0      0 0.0.0.0:123             0.0.0.0:* 
         -
udp6       0      0 :::123                  :::* 
         -
[john at HP_Box ~]$ su
Password:
[root at HP_Box john]# netstat -pna | grep :123
udp        0      0 0.0.0.0:123             0.0.0.0:* 
         692/chronyd
udp6       0      0 :::123                  :::* 
         692/chronyd
[root at HP_Box john]# netstat -pna | grep :323
udp        0      0 127.0.0.1:323           0.0.0.0:* 
         692/chronyd
udp6       0      0 ::1:323                 :::* 
         692/chronyd
[root at HP_Box john]# exit
exit
[john at HP_Box ~]$