[ntp:questions] ntpdate works, but ntpd doesn't (reach = 0)

Danny Mayer mayer at ntp.isc.org
Sat Feb 7 02:16:22 UTC 2009


Martin Burnicki wrote:
> Danny,
> 
> sorry for the late reply, I've been offline for a few days.
> 
> Danny Mayer wrote:
>> Martin Burnicki wrote:
>>> Lizvette,
>>>
>>> Lizvette Malave wrote:
>>>> ntpdate timeServer (without the -u option) works too.
>>>> Is there a way to make the ntpd use a different port?
>>> If "ntpdate timeServer" works then this does not seem to be a firewall
>>> issue.
>>>
>> On the contrary. Some people block outgoing packets from privileged
>> ports like 123/UDP. ntpdate uses a non-privileged port and is therefore
>> not blocked.
> 
> What you wrote above about port usage by ntpdate is not correct and you
> should know this.

You're right. I almost never go into this code so I misremembered.

Danny



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