[ntp:questions] systems won't synchronize no matter what

Martin Burnicki martin.burnicki at meinberg.de
Mon Oct 25 10:56:40 UTC 2010

unruh wrote:
> On 2010-10-24, Richard B. Gilbert <rgilbert88 at comcast.net> wrote:
>> On 10/22/2010 2:24 PM, Florin Andrei wrote:
>>> server # local clock
>>> fudge stratum 10
>>> driftfile /etc/ntp/drift
>>> restrict mask
>>> restrict mask nomodify notrap
>>> restrict default ignore
>> Lose the restrict statements.  Getting it working first!

I absolutely agree.

>> You may have to ask your networking people to allow NTP traffic to get
>> through the firewall.  Port 123 should  be allowed.
> He says ntpdate works.

Yes, but a firewall may be a problem anyway:

- If you run "ntpdate -q server" then ntpdate uses an unprivileged port.
- If you run "ntpdate server" then ntpdate uses port 123

Please note whereas the former command (query only) can be used any time,
the latter works *only* while ntpd is *not* running.

On the other hand only the latter ntpdate command is affected by the same
firewall rules as ntpd.

Martin Burnicki

Meinberg Funkuhren
Bad Pyrmont

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