[CentOS] Synchronize Time Services

[Robert Moskowitz]

On 02/19/2013 01:49 PM, Todor Petkov wrote:
> On 19/02/2013 08:39 PM, Bassem Sossan wrote:
>> Hello all
>>
>> Can I use this to configure " ntp.conf " :
>>
>> server ns1.bos.redhat.com
>> server 10.5.26.10
>>
>> Or we have a replacement for CentOS that we've to use it...
>
> You can use
>
> 0.centos.pool.ntp.org
> 1.centos.pool.ntp.org
>
> or
> X.pool.ntp.org
>
> where X from 0 to 3
>
> You can check http://www.pool.ntp.org/en/use.html

And you may want to consider adding "iburst" to your server(s).  It is 
recommended, whereas "burst" is frowned upon and "could get you 
blacklisted".

If you are behind a firewall, remember that the response comes back on 
UDP 123, same as it went out on.