[ntp:questions] NTPD concurrent clients limit

Richard B. Gilbert rgilbert88 at comcast.net
Sun Aug 17 15:21:27 UTC 2008

Danny Mayer wrote:
> Phil wrote:
>> I may have an application that could conceivably hit timeservers by the tens 
>> of thousands, and potentially far far greater.  It would be from different 
>> ip's but my concern, should that be the case, it may or could be considered 
>> a rouge script or equipment causing an attack. I certainly don't want you 
>> and the rest of the Calvary to be hunting me down.  If we follow through on 
>> this project, we intend to use our own timeservers not only to keep the 
>> Calvary at bay; I can have better and more accurate control using gps 
>> disciplined rubidium timebases for the servers.
> This concerns me. If you have an application that needs NTP server 
> sources requiring those kinds of volumes you should be deploying your 
> own NTP servers or negotiating deals with other service providers in 
> those countries that you will be delivering your services. Neither the 
> stratum 1 or stratum 2 or the pool servers are designed to meet the 
> needs of high-volume private applications.
> Danny

If many systems at a single site are running the application, then 
broadcast or multicast would appear to be viable solutions.

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