[CentOS] Advice in Time Sync

[m.roth at 5-cent.us]

SilverTip257 wrote:
> On Wed, Jan 15, 2014 at 5:53 AM, John Doe <jdmls at yahoo.com> wrote:
>
>> From: John R Pierce <pierce at hogranch.com>
>>
>> >>  How to set up timing if NTP was block by ISP?
>> > your ISP doesn't have their own timeserver you can access??
>> > I've never heard of an ISP blocking ntp protocol, unless they are
>> > blocking /everything/ but web and email via proxy, whereupon they
>> > aren't really an internet service provider, they are just a web-n-mail
>> > service provider.
>>
>> Maybe related to the (recent?) DDOS using ntp servers...?
>
> Sounds likely.
> ACLs like that are bad practice, but some people can get overzealous.
>  Hopefully they're only temporary until the hosts running NTP have been
> further secured.
>
> http://blog.cloudflare.com/understanding-and-mitigating-ntp-based-ddos-attacks
>
> It is probably a good idea to call and complain to your ISP if this is
> happening to you.
>
> As others mentioned, the OP might be able to sync time off their ISP's NTP
> servers (if provided). Or go with a GPS time source as John Pierce
suggested.

Missed the beginning of this thread. You did try to point to nist.gov?
<http://tf.nist.gov/tf-cgi/servers.cgi>

        mark