[CentOS] Advice in Time Sync

[Fabrizio Di Carlo]

You can setup a your own NTP server following this howto:
http://brainwreckedtech.wordpress.com/2008/08/25/howto-run-your-own-ntp-server-when-your-isp-blocks-ports/
and adapting it for CentOS, or you can use a workaround like trying to
setup a cron job to run ntpdate every 15 minutes to sync system time
with ntp.org public servers using unprivilleged port.

15 * * * * /usr/sbin/ntpdate -s -u -B pool.ntp.org

-s option tells ntpdate to print output to syslog; -u tells it to use
unprivilleged port; -B tell it to adjust the time incrementally as
oppose to instantly.

Then setup ntpd as a local ntp server for internal use. This ntpd uses
it's localtime as the source instead of syncing from another ntp.org
public server.

On Wed, Jan 15, 2014 at 8:56 AM, Ku Wei Xiong <kuweixiong at gmail.com> wrote:
> Dear all,
>
> I would need some advice as I am a beginner in CentOS.
>
> The question is as follows:
>
> How to set up timing if NTP was block by ISP?
>
> I have try many way such as link the timezone , getting from the hardware
> clock.However , it is not the solution.
>
> Please advice.
>
> --
> Regards,
> Ku Wei Xiong
> 0166365831
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos



-- 
"The intuitive mind is a sacred gift and the rational mind is a
faithful servant. We have created a society that honors the servant
and has forgotten the gift." (A. Einstein)

"La mente intuitiva è un dono sacro e la mente razionale è un fedele
servo. Noi abbiamo creato una società che onora il servo e ha
dimenticato il dono."  (A. Einstein)

Fabrizio Di Carlo